95 lines
2.4 KiB
JavaScript
95 lines
2.4 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @polyfill
|
|
* @nolint
|
|
*/
|
|
|
|
/* eslint-disable no-bitwise, no-extend-native, radix, no-self-compare */
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex
|
|
function findIndex(predicate, context) {
|
|
if (this == null) {
|
|
throw new TypeError(
|
|
'Array.prototype.findIndex called on null or undefined'
|
|
);
|
|
}
|
|
if (typeof predicate !== 'function') {
|
|
throw new TypeError('predicate must be a function');
|
|
}
|
|
var list = Object(this);
|
|
var length = list.length >>> 0;
|
|
for (var i = 0; i < length; i++) {
|
|
if (predicate.call(context, list[i], i, list)) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
if (!Array.prototype.findIndex) {
|
|
Object.defineProperty(Array.prototype, 'findIndex', {
|
|
enumerable: false,
|
|
writable: true,
|
|
configurable: true,
|
|
value: findIndex
|
|
});
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
|
|
if (!Array.prototype.find) {
|
|
Object.defineProperty(Array.prototype, 'find', {
|
|
enumerable: false,
|
|
writable: true,
|
|
configurable: true,
|
|
value: function(predicate, context) {
|
|
if (this == null) {
|
|
throw new TypeError(
|
|
'Array.prototype.find called on null or undefined'
|
|
);
|
|
}
|
|
var index = findIndex.call(this, predicate, context);
|
|
return index === -1 ? undefined : this[index];
|
|
}
|
|
});
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
|
|
if (!Array.prototype.includes) {
|
|
Object.defineProperty(Array.prototype, 'includes', {
|
|
enumerable: false,
|
|
writable: true,
|
|
configurable: true,
|
|
value: function (searchElement) {
|
|
var O = Object(this);
|
|
var len = parseInt(O.length) || 0;
|
|
if (len === 0) {
|
|
return false;
|
|
}
|
|
var n = parseInt(arguments[1]) || 0;
|
|
var k;
|
|
if (n >= 0) {
|
|
k = n;
|
|
} else {
|
|
k = len + n;
|
|
if (k < 0) {
|
|
k = 0;
|
|
}
|
|
}
|
|
var currentElement;
|
|
while (k < len) {
|
|
currentElement = O[k];
|
|
if (searchElement === currentElement ||
|
|
(searchElement !== searchElement && currentElement !== currentElement)) {
|
|
return true;
|
|
}
|
|
k++;
|
|
}
|
|
return false;
|
|
}
|
|
});
|
|
}
|