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feat(linter): implement unicorn/prefer-negative-index (#6920)

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[unicorn/prefer-negative-index](https://github.com/sindresorhus/eslint-plugin-unicorn/blob/v56.0.0/docs/rules/prefer-negative-index.md)

---------

Co-authored-by: Brian Liu <brian@redflagsdating.com>
Co-authored-by: Cameron Clark <cameron.clark@hey.com>
This commit is contained in:
Brian Liu 2024-11-25 20:25:15 +11:00 committed by GitHub
parent ecd0c0807f
commit 0b9da38a9e
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3 changed files with 1154 additions and 0 deletions
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2
crates/oxc_linter/src/rules.rs
View file

@ -353,6 +353,7 @@ mod unicorn {
pub mod prefer_modern_dom_apis; pub mod prefer_modern_dom_apis;
pub mod prefer_modern_math_apis; pub mod prefer_modern_math_apis;
pub mod prefer_native_coercion_functions; pub mod prefer_native_coercion_functions;
pub mod prefer_negative_index;
pub mod prefer_node_protocol; pub mod prefer_node_protocol;
pub mod prefer_number_properties; pub mod prefer_number_properties;
pub mod prefer_optional_catch_binding; pub mod prefer_optional_catch_binding;
@ -943,6 +944,7 @@ oxc_macros::declare_all_lint_rules! {
unicorn::prefer_modern_dom_apis, unicorn::prefer_modern_dom_apis,
unicorn::prefer_modern_math_apis, unicorn::prefer_modern_math_apis,
unicorn::prefer_native_coercion_functions, unicorn::prefer_native_coercion_functions,
unicorn::prefer_negative_index,
unicorn::prefer_node_protocol, unicorn::prefer_node_protocol,
unicorn::prefer_number_properties, unicorn::prefer_number_properties,
unicorn::prefer_optional_catch_binding, unicorn::prefer_optional_catch_binding,

646
crates/oxc_linter/src/rules/unicorn/prefer_negative_index.rs Normal file
View file

@ -0,0 +1,646 @@
use oxc_ast::{
ast::{
Argument, ArrayExpressionElement, BinaryExpression, BinaryOperator, Expression,
StaticMemberExpression,
},
AstKind,
};
use oxc_diagnostics::OxcDiagnostic;
use oxc_macros::declare_oxc_lint;
use oxc_span::{GetSpan, Span};
use crate::{context::LintContext, fixer::Fix, rule::Rule, utils::is_same_reference, AstNode};
fn prefer_negative_index_diagnostic(span: Span) -> OxcDiagnostic {
OxcDiagnostic::warn("Prefer negative index over .length - index when possible").with_label(span)
}
#[derive(Debug, Default, Clone)]
pub struct PreferNegativeIndex;
#[derive(Debug)]
enum TypeOptions {
String,
Array,
TypedArray,
Literal,
Unknown,
}
declare_oxc_lint!(
/// ### What it does
/// Prefer negative index over `.length` - index when possible
///
/// ### Why is this bad?
/// Conciseness and readability
///
/// ### Examples
///
/// Examples of **incorrect** code for this rule:
/// ```js
/// foo.slice(foo.length - 2, foo.length - 1);
/// foo.at(foo.length - 1);
/// ```
///
/// Examples of **correct** code for this rule:
/// ```js
/// foo.slice(-2, -1);
/// foo.at(-1);
/// ```
PreferNegativeIndex,
style,
fix
);
impl Rule for PreferNegativeIndex {
fn run<'a>(&self, node: &AstNode<'a>, ctx: &LintContext<'a>) {
let AstKind::CallExpression(call_expr) = node.kind() else {
return;
};
if !call_expr.callee.is_member_expression() {
return;
}
let callee_object_expr = call_expr.callee.to_member_expression().object();
let Some(name) = call_expr.callee_name() else { return };
let is_prototype_call = name == "call";
let is_prototype_apply = name == "apply";
let is_prototype =
callee_object_expr.is_member_expression() && (is_prototype_call || is_prototype_apply);
let Some(callee_name) = (if is_prototype {
callee_object_expr.to_member_expression().static_property_name()
} else {
Some(name)
}) else {
return;
};
let callee_type = if is_prototype {
get_prototype_callee_type(callee_object_expr.to_member_expression().object())
} else {
TypeOptions::Literal
};
let identifier_expr = match (callee_type, callee_name) {
(TypeOptions::String, "slice" | "at")
| (TypeOptions::TypedArray, "slice" | "at" | "with" | "subarray")
| (TypeOptions::Array, "slice" | "at" | "splice" | "with" | "toSpliced")
| (
TypeOptions::Literal,
"slice" | "at" | "splice" | "subarray" | "with" | "toSpliced",
) => {
if is_prototype {
let Some(first_arg) =
call_expr.arguments.first().and_then(Argument::as_expression)
else {
return;
};
first_arg
} else {
callee_object_expr
}
}
_ => return,
};
let mut member_exprs: Vec<&StaticMemberExpression> = Vec::new();
let range_increment = if matches!(callee_name, "slice" | "subarray") { 2 } else { 1 };
let arg_range_start = usize::from(is_prototype);
let arg_range_end = if is_prototype_apply {
arg_range_start + 1
} else {
arg_range_start + range_increment
};
for (i, argument) in call_expr.arguments.iter().enumerate() {
if i >= arg_range_end {
break;
}
let Some(arg_expr) = argument.as_expression() else {
continue;
};
match arg_expr {
Expression::BinaryExpression(binary_expr) => {
let Some(member_expr) = get_binary_left_expr(binary_expr) else {
continue;
};
if is_same_node(identifier_expr, &member_expr.object, ctx) {
member_exprs.push(member_expr);
}
}
Expression::ArrayExpression(array_expr) => {
for (j, element) in array_expr.elements.iter().enumerate() {
if j >= range_increment {
break;
}
if let ArrayExpressionElement::BinaryExpression(binary_expr) = element {
let Some(el_member_expr) = get_binary_left_expr(binary_expr) else {
continue;
};
if is_same_node(identifier_expr, &el_member_expr.object, ctx) {
member_exprs.push(el_member_expr);
}
}
}
}
_ => continue,
}
}
if !member_exprs.is_empty() {
ctx.diagnostic_with_fix(prefer_negative_index_diagnostic(call_expr.span), |fixer| {
let mut fixes = fixer.new_fix_with_capacity(member_exprs.len());
for member_expr in member_exprs {
let member_expr_span = member_expr.span();
let member_expr_next_end = member_expr_span.end + 1;
let member_expr_with_next_span =
Span::new(member_expr_span.start, member_expr_next_end);
let member_expr_with_next_str = ctx.source_range(member_expr_with_next_span);
if member_expr_with_next_str.ends_with(' ') {
fixes.push(Fix::delete(member_expr_with_next_span));
} else {
fixes.push(Fix::delete(member_expr_span));
}
}
fixes
});
}
}
}
fn is_same_node(left: &Expression, right: &Expression, ctx: &LintContext) -> bool {
if is_same_reference(left, right, ctx) {
return true;
}
match (left, right) {
(
Expression::ComputedMemberExpression(left_computed_expr),
Expression::ComputedMemberExpression(right_computed_expr),
) => is_same_node(&left_computed_expr.expression, &right_computed_expr.expression, ctx),
(Expression::StringLiteral(left_lit), Expression::NumericLiteral(right_lit)) => {
left_lit.to_string() == right_lit.to_string()
}
(Expression::NumericLiteral(left_lit), Expression::StringLiteral(right_lit)) => {
left_lit.to_string() == right_lit.to_string()
}
(
Expression::TemplateLiteral(left_template_lit),
Expression::StringLiteral(right_string_lit),
) => {
let Some(template_str) = left_template_lit.quasi() else {
return false;
};
return template_str.as_str() == right_string_lit.to_string();
}
(
Expression::StringLiteral(left_string_lit),
Expression::TemplateLiteral(right_template_lit),
) => {
let Some(template_str) = right_template_lit.quasi() else {
return false;
};
return left_string_lit.to_string() == template_str.as_str();
}
_ => false,
}
}
fn get_prototype_callee_type(expression: &Expression) -> TypeOptions {
match expression {
Expression::ArrayExpression(_) => TypeOptions::Array,
Expression::StringLiteral(_) => TypeOptions::String,
Expression::StaticMemberExpression(static_member_expr) => {
let Some(identifier_ref) = static_member_expr.object.get_identifier_reference() else {
return TypeOptions::Unknown;
};
if static_member_expr.property.name.as_str() != "prototype" {
return TypeOptions::Unknown;
}
match identifier_ref.name.as_str() {
"String" => TypeOptions::String,
"Array" => TypeOptions::Array,
"Int8Array" | "Uint8Array" | "Uint8ClampedArray" | "Int16Array" | "Uint16Array"
| "Int32Array" | "Uint32Array" | "Float32Array" | "Float64Array"
| "BigInt64Array" | "BigUint64Array" | "ArrayBuffer" => TypeOptions::TypedArray,
_ => TypeOptions::Unknown,
}
}
_ => TypeOptions::Unknown,
}
}
fn get_binary_left_expr<'a>(
binary_expr: &'a BinaryExpression,
) -> Option<&'a StaticMemberExpression<'a>> {
if !matches!(binary_expr.operator, BinaryOperator::Subtraction)
|| !binary_expr.right.is_number_literal() | binary_expr.right.is_number_0()
{
return None;
}
match &binary_expr.left {
Expression::ParenthesizedExpression(paren_expr) => {
let Expression::BinaryExpression(paren_inner_binary_expr) = &paren_expr.expression
else {
return None;
};
get_binary_left_expr(paren_inner_binary_expr)
}
Expression::BinaryExpression(inner_binary_expr) => get_binary_left_expr(inner_binary_expr),
Expression::StaticMemberExpression(member_expr) => {
if member_expr.property.name == "length" {
return Some(member_expr.as_ref());
}
None
}
_ => None,
}
}
#[test]
fn test() {
use crate::tester::Tester;
let pass = vec![
"foo.slice(-2, -1)",
"foo.splice(-1, 1)",
"Array.prototype.slice.call(foo, -2, -1)",
"Array.prototype.slice.apply(foo, [-2, -1])",
"slice(foo.length - 1)",
"foo.forEach(foo.length - 1)",
"Array.prototype.forEach.call(foo, foo.length - 1)",
"FOO.prototype.slice.apply(foo, [-2, -1])",
r#"Array.prototype.slice.apply(foo, "")"#,
"new Foo.forEach(Foo.length - 1)",
"foo.slice(bar.length - 1)",
"foo.slice(foo.length - 0)",
r#"foo.slice(foo.length - "1")"#,
"foo.slice(foo.length - (-1))",
"foo.slice(foo.length + 1)",
"foo.slice(foo.length - 2 + 1)",
"foo.slice((foo.length - 1) + 1)",
"foo.slice(foo.length - 1 / 1)",
"[1, 2, 3].slice([1, 2, 3].length - 1)",
"foo[bar++].slice(foo[bar++].length - 1)",
"foo[a + b].slice(foo[a + b].length - 1)",
"foo[`${bar}`].slice(foo[`${bar}`].length - 1)",
"function foo() {return [].slice.apply(arguments);}",
"String.prototype.toSpliced.call(foo, foo.length - 1)",
"String.prototype.with.call(foo, foo.length - 1)",
"Uint8Array.prototype.toSpliced.call(foo, foo.length - 1)",
"Array.prototype.subarray.call(foo, foo.length - 1)",
];
let fail = vec![
"foo.slice(foo.length - 2, foo.length - 1)",
"foo.splice(foo.length - 1, 1)",
"Array.prototype.slice.call(foo, foo.length - 2, foo.length - 1)",
"Array.prototype.slice.apply(foo, [foo.length - 2, foo.length - 1])",
"foo.slice(foo.length - 1 - 1)",
"foo.bar.slice(foo.bar.length - 1)",
"foo['bar'].slice(foo['bar'].length - 1)",
"foo[1].slice(foo[1].length - 1)",
"foo.slice(foo.length/* comment */ - 1)",
"
foo.slice(
// comment 1
foo.length
// comment 2
- 1
-1
,
foo.length // comment 3
- 1
)
",
"foo.slice((foo.length - 1) - 1)",
"foo.slice(/* will keep */(/* will keep 1 */foo.length - 1) - 1)",
"
[].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
[].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
[].slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
[].splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
[NOT_EMPTY].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
[NOT_EMPTY].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
[NOT_EMPTY].slice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
[NOT_EMPTY].splice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
",
"
''.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
''.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
''.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
''.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
'NOT_EMPTY'.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
'NOT_EMPTY'.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
'NOT_EMPTY'.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
'NOT_EMPTY'.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
",
"
Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
String.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
String.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
ArrayBuffer.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
ArrayBuffer.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int8Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8ClampedArray.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8ClampedArray.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int16Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint16Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigInt64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigInt64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigUint64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigUint64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
NOT_SUPPORTED.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
NOT_SUPPORTED.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
",
"
Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
String.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
String.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
ArrayBuffer.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
ArrayBuffer.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int8Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8ClampedArray.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8ClampedArray.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int16Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint16Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigInt64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigInt64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigUint64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigUint64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
NOT_SUPPORTED.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
NOT_SUPPORTED.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
",
"/**/foo.slice(foo.length - 2, foo.length - 1)",
"/**/foo.splice(foo.length - 1, 1)",
r#"foo.bar.slice(foo["bar"].length - 1)"#,
r#"foo[`bar`].slice(foo["bar"].length - 1)"#,
r#"foo[1].slice(foo["1"].length - 1)"#,
r#"foo['bar'].slice(foo["bar"].length - 1)"#,
"foo.toSpliced(foo.length - 3, foo.length - 6)",
"Array.prototype.toSpliced.call(foo, foo.length - 3, foo.length - 6)",
"[].toSpliced.call(foo, foo.length - 3, foo.length - 6)",
"foo.with(foo.length - 3, foo.length - 6)",
"Array.prototype.with.call(foo, foo.length - 3, foo.length - 6)",
"foo.subarray(foo.length - 3, foo.length - 6)",
"Uint8Array.prototype.subarray.call(foo, foo.length - 3, foo.length - 6)",
"Uint8Array.prototype.subarray.apply(foo, [foo.length - 3, foo.length - 6])",
];
let fix = vec![
("foo.slice(foo.length - 2, foo.length - 1)", "foo.slice(- 2, - 1)", None),
("foo.splice(foo.length - 1, 1)", "foo.splice(- 1, 1)", None),
(
"Array.prototype.slice.call(foo, foo.length - 2, foo.length - 1)",
"Array.prototype.slice.call(foo, - 2, - 1)",
None,
),
(
"Array.prototype.slice.apply(foo, [foo.length - 2, foo.length - 1])",
"Array.prototype.slice.apply(foo, [- 2, - 1])",
None,
),
("foo.slice(foo.length - 1 - 1)", "foo.slice(- 1 - 1)", None),
("foo.bar.slice(foo.bar.length - 1)", "foo.bar.slice(- 1)", None),
("foo['bar'].slice(foo['bar'].length - 1)", "foo['bar'].slice(- 1)", None),
("foo[1].slice(foo[1].length - 1)", "foo[1].slice(- 1)", None),
("foo.slice(foo.length/* comment */ - 1)", "foo.slice(/* comment */ - 1)", None),
(
"
foo.slice(
// comment 1
foo.length
// comment 2
- 1,
-1
,
foo.length // comment 3
- 1
)
",
"
foo.slice(
// comment 1
// comment 2
- 1,
-1
,
foo.length // comment 3
- 1
)
",
None,
),
("foo.slice((foo.length - 1) - 1)", "foo.slice((- 1) - 1)", None),
(
"foo.slice(/* will keep */(/* will keep 1 */foo.length - 1) - 1)",
"foo.slice(/* will keep */(/* will keep 1 */- 1) - 1)",
None,
),
(
"
[].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
[].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
[].slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
[].splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
",
"
[].slice.call(foo, - 1, - 2, foo.length - 3);
[].splice.call(foo, - 1, foo.length - 2, foo.length - 3);
[].slice.apply(foo, [- 1, - 2, foo.length - 3]);
[].splice.apply(foo, [- 1, foo.length - 2, foo.length - 3]);
",
None,
),
("
''.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
''.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
''.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
''.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
", "
''.slice.call(foo, - 1, - 2, foo.length - 3);
''.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
''.slice.apply(foo, [- 1, - 2, foo.length - 3]);
''.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
", None),
("
Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
String.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
String.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
ArrayBuffer.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
ArrayBuffer.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int8Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8ClampedArray.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8ClampedArray.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int16Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint16Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigInt64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigInt64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigUint64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigUint64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
NOT_SUPPORTED.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
NOT_SUPPORTED.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
", "
Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Array.prototype.splice.call(foo, - 1, foo.length - 2, foo.length - 3);
String.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
String.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
ArrayBuffer.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
ArrayBuffer.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int8Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Int8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Uint8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint8ClampedArray.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Uint8ClampedArray.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int16Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Int16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint16Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Uint16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Int32Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Int32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Uint32Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Uint32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float32Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Float32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
Float64Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
Float64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigInt64Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
BigInt64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
BigUint64Array.prototype.slice.call(foo, - 1, - 2, foo.length - 3);
BigUint64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
NOT_SUPPORTED.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
NOT_SUPPORTED.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
", None),
("
Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
String.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
String.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
ArrayBuffer.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
ArrayBuffer.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int8Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8ClampedArray.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8ClampedArray.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int16Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint16Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigInt64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigInt64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigUint64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigUint64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
NOT_SUPPORTED.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
NOT_SUPPORTED.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
", "
Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Array.prototype.splice.apply(foo, [- 1, foo.length - 2, foo.length - 3]);
String.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
String.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
ArrayBuffer.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
ArrayBuffer.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int8Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Int8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Uint8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint8ClampedArray.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Uint8ClampedArray.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int16Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Int16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint16Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Uint16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Int32Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Int32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Uint32Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Uint32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float32Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Float32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
Float64Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
Float64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigInt64Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
BigInt64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
BigUint64Array.prototype.slice.apply(foo, [- 1, - 2, foo.length - 3]);
BigUint64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
NOT_SUPPORTED.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
NOT_SUPPORTED.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
", None)
];
Tester::new(PreferNegativeIndex::NAME, pass, fail).expect_fix(fix).test_and_snapshot();
}

506
crates/oxc_linter/src/snapshots/prefer_negative_index.snap Normal file
View file

@ -0,0 +1,506 @@
---
source: crates/oxc_linter/src/tester.rs
---
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.slice(foo.length - 2, foo.length - 1)
· ─────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.splice(foo.length - 1, 1)
· ─────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ Array.prototype.slice.call(foo, foo.length - 2, foo.length - 1)
· ───────────────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ Array.prototype.slice.apply(foo, [foo.length - 2, foo.length - 1])
· ──────────────────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.slice(foo.length - 1 - 1)
· ─────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.bar.slice(foo.bar.length - 1)
· ─────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo['bar'].slice(foo['bar'].length - 1)
· ───────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo[1].slice(foo[1].length - 1)
· ───────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.slice(foo.length/* comment */ - 1)
· ──────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:2:16]
1 │
2 │ ╭─▶ foo.slice(
3 │ │ // comment 1
4 │ │
5 │ │ foo.length
6 │ │
7 │ │ // comment 2
8 │ │ - 1
9 │ │ -1
10 │ │ ,
11 │ │ foo.length // comment 3
12 │ │ - 1
13 │ ╰─▶ )
14 │
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.slice((foo.length - 1) - 1)
· ───────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.slice(/* will keep */(/* will keep 1 */foo.length - 1) - 1)
· ───────────────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:2:16]
1 │
2 │ [].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ──────────────────────────────────────────────────────────────────
3 │ [].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:3:16]
2 │ [].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
3 │ [].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────
4 │ [].slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:4:16]
3 │ [].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
4 │ [].slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ─────────────────────────────────────────────────────────────────────
5 │ [].splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:5:16]
4 │ [].slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
5 │ [].splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────
6 │ [NOT_EMPTY].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:6:16]
5 │ [].splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
6 │ [NOT_EMPTY].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────────────
7 │ [NOT_EMPTY].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:7:16]
6 │ [NOT_EMPTY].slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
7 │ [NOT_EMPTY].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────
8 │ [NOT_EMPTY].slice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:8:16]
7 │ [NOT_EMPTY].splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
8 │ [NOT_EMPTY].slice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ─────────────────────────────────────────────────────────────────────────────
9 │ [NOT_EMPTY].splice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:9:16]
8 │ [NOT_EMPTY].slice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
9 │ [NOT_EMPTY].splice.call(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────────────
10 │
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:2:16]
1 │
2 │ ''.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ──────────────────────────────────────────────────────────────────
3 │ ''.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:4:16]
3 │ ''.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
4 │ ''.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ─────────────────────────────────────────────────────────────────────
5 │ ''.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:6:16]
5 │ ''.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
6 │ 'NOT_EMPTY'.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────────────
7 │ 'NOT_EMPTY'.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:8:16]
7 │ 'NOT_EMPTY'.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
8 │ 'NOT_EMPTY'.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────────────
9 │ 'NOT_EMPTY'.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:2:16]
1 │
2 │ Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────────────────
3 │ Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:3:16]
2 │ Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
3 │ Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────────
4 │ String.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:4:16]
3 │ Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
4 │ String.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────────
5 │ String.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:6:16]
5 │ String.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
6 │ ArrayBuffer.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ─────────────────────────────────────────────────────────────────────────────────────
7 │ ArrayBuffer.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:8:16]
7 │ ArrayBuffer.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
8 │ Int8Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────────────────────
9 │ Int8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:10:16]
9 │ Int8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
10 │ Uint8Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────────────
11 │ Uint8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:12:16]
11 │ Uint8Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
12 │ Uint8ClampedArray.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────────────────────────────
13 │ Uint8ClampedArray.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:14:16]
13 │ Uint8ClampedArray.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
14 │ Int16Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────────────
15 │ Int16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:16:16]
15 │ Int16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
16 │ Uint16Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ─────────────────────────────────────────────────────────────────────────────────────
17 │ Uint16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:18:16]
17 │ Uint16Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
18 │ Int32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────────────
19 │ Int32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:20:16]
19 │ Int32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
20 │ Uint32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ─────────────────────────────────────────────────────────────────────────────────────
21 │ Uint32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:22:16]
21 │ Uint32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
22 │ Float32Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ──────────────────────────────────────────────────────────────────────────────────────
23 │ Float32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:24:16]
23 │ Float32Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
24 │ Float64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ──────────────────────────────────────────────────────────────────────────────────────
25 │ Float64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:26:16]
25 │ Float64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
26 │ BigInt64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ───────────────────────────────────────────────────────────────────────────────────────
27 │ BigInt64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:28:16]
27 │ BigInt64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
28 │ BigUint64Array.prototype.slice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
· ────────────────────────────────────────────────────────────────────────────────────────
29 │ BigUint64Array.prototype.splice.call(foo, foo.length - 1, foo.length - 2, foo.length - 3);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:2:16]
1 │
2 │ Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────────────────
3 │ Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:3:16]
2 │ Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
3 │ Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ───────────────────────────────────────────────────────────────────────────────────
4 │ String.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:4:16]
3 │ Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
4 │ String.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ───────────────────────────────────────────────────────────────────────────────────
5 │ String.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:6:16]
5 │ String.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
6 │ ArrayBuffer.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ────────────────────────────────────────────────────────────────────────────────────────
7 │ ArrayBuffer.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:8:16]
7 │ ArrayBuffer.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
8 │ Int8Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────────────────────
9 │ Int8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:10:16]
9 │ Int8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
10 │ Uint8Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ───────────────────────────────────────────────────────────────────────────────────────
11 │ Uint8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:12:16]
11 │ Uint8Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
12 │ Uint8ClampedArray.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────────────────────────────
13 │ Uint8ClampedArray.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:14:16]
13 │ Uint8ClampedArray.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
14 │ Int16Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ───────────────────────────────────────────────────────────────────────────────────────
15 │ Int16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:16:16]
15 │ Int16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
16 │ Uint16Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ────────────────────────────────────────────────────────────────────────────────────────
17 │ Uint16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:18:16]
17 │ Uint16Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
18 │ Int32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ───────────────────────────────────────────────────────────────────────────────────────
19 │ Int32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:20:16]
19 │ Int32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
20 │ Uint32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ────────────────────────────────────────────────────────────────────────────────────────
21 │ Uint32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:22:16]
21 │ Uint32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
22 │ Float32Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ─────────────────────────────────────────────────────────────────────────────────────────
23 │ Float32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:24:16]
23 │ Float32Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
24 │ Float64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ─────────────────────────────────────────────────────────────────────────────────────────
25 │ Float64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:26:16]
25 │ Float64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
26 │ BigInt64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ──────────────────────────────────────────────────────────────────────────────────────────
27 │ BigInt64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:28:16]
27 │ BigInt64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
28 │ BigUint64Array.prototype.slice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
· ───────────────────────────────────────────────────────────────────────────────────────────
29 │ BigUint64Array.prototype.splice.apply(foo, [foo.length - 1, foo.length - 2, foo.length - 3]);
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:5]
1 │ /**/foo.slice(foo.length - 2, foo.length - 1)
· ─────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:5]
1 │ /**/foo.splice(foo.length - 1, 1)
· ─────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.bar.slice(foo["bar"].length - 1)
· ────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo[`bar`].slice(foo["bar"].length - 1)
· ───────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo[1].slice(foo["1"].length - 1)
· ─────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo['bar'].slice(foo["bar"].length - 1)
· ───────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.toSpliced(foo.length - 3, foo.length - 6)
· ─────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ Array.prototype.toSpliced.call(foo, foo.length - 3, foo.length - 6)
· ───────────────────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ [].toSpliced.call(foo, foo.length - 3, foo.length - 6)
· ──────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.with(foo.length - 3, foo.length - 6)
· ────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ Array.prototype.with.call(foo, foo.length - 3, foo.length - 6)
· ──────────────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ foo.subarray(foo.length - 3, foo.length - 6)
· ────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ Uint8Array.prototype.subarray.call(foo, foo.length - 3, foo.length - 6)
· ───────────────────────────────────────────────────────────────────────
╰────
⚠ eslint-plugin-unicorn(prefer-negative-index): Prefer negative index over .length - index when possible
╭─[prefer_negative_index.tsx:1:1]
1 │ Uint8Array.prototype.subarray.apply(foo, [foo.length - 3, foo.length - 6])
· ──────────────────────────────────────────────────────────────────────────
╰────