You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
1.3 KiB
32 lines
1.3 KiB
var toIndexedObject = require('../internals/to-indexed-object'); |
|
var toAbsoluteIndex = require('../internals/to-absolute-index'); |
|
var lengthOfArrayLike = require('../internals/length-of-array-like'); |
|
|
|
// `Array.prototype.{ indexOf, includes }` methods implementation |
|
var createMethod = function (IS_INCLUDES) { |
|
return function ($this, el, fromIndex) { |
|
var O = toIndexedObject($this); |
|
var length = lengthOfArrayLike(O); |
|
var index = toAbsoluteIndex(fromIndex, length); |
|
var value; |
|
// Array#includes uses SameValueZero equality algorithm |
|
// eslint-disable-next-line no-self-compare -- NaN check |
|
if (IS_INCLUDES && el != el) while (length > index) { |
|
value = O[index++]; |
|
// eslint-disable-next-line no-self-compare -- NaN check |
|
if (value != value) return true; |
|
// Array#indexOf ignores holes, Array#includes - not |
|
} else for (;length > index; index++) { |
|
if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0; |
|
} return !IS_INCLUDES && -1; |
|
}; |
|
}; |
|
|
|
module.exports = { |
|
// `Array.prototype.includes` method |
|
// https://tc39.es/ecma262/#sec-array.prototype.includes |
|
includes: createMethod(true), |
|
// `Array.prototype.indexOf` method |
|
// https://tc39.es/ecma262/#sec-array.prototype.indexof |
|
indexOf: createMethod(false) |
|
};
|
|
|