Initial commit
This commit is contained in:
@@ -0,0 +1,48 @@
|
||||
// https://tc39.github.io/ecma262/#sec-array.prototype.includes
|
||||
if (!Array.prototype.includes) {
|
||||
Object.defineProperty(Array.prototype, "includes", {
|
||||
value: function(searchElement, fromIndex) {
|
||||
|
||||
// 1. Let O be ? ToObject(this value).
|
||||
if (this == null) {
|
||||
throw new TypeError("\"this\" is null or not defined");
|
||||
}
|
||||
|
||||
var o = Object(this);
|
||||
|
||||
// 2. Let len be ? ToLength(? Get(O, "length")).
|
||||
var len = o.length >>> 0;
|
||||
|
||||
// 3. If len is 0, return false.
|
||||
if (len === 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// 4. Let n be ? ToInteger(fromIndex).
|
||||
// (If fromIndex is undefined, this step produces the value 0.)
|
||||
var n = fromIndex | 0;
|
||||
|
||||
// 5. If n ≥ 0, then
|
||||
// a. Let k be n.
|
||||
// 6. Else n < 0,
|
||||
// a. Let k be len + n.
|
||||
// b. If k < 0, let k be 0.
|
||||
var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
|
||||
|
||||
// 7. Repeat, while k < len
|
||||
while (k < len) {
|
||||
// a. Let elementK be the result of ? Get(O, ! ToString(k)).
|
||||
// b. If SameValueZero(searchElement, elementK) is true, return true.
|
||||
// c. Increase k by 1.
|
||||
// NOTE: === provides the correct "SameValueZero" comparison needed here.
|
||||
if (o[k] === searchElement) {
|
||||
return true;
|
||||
}
|
||||
k++;
|
||||
}
|
||||
|
||||
// 8. Return false
|
||||
return false;
|
||||
}
|
||||
});
|
||||
}
|
||||
@@ -0,0 +1,10 @@
|
||||
const reduce = Function.bind.call(Function.call, Array.prototype.reduce);
|
||||
const isEnumerable = Function.bind.call(Function.call, Object.prototype.propertyIsEnumerable);
|
||||
const concat = Function.bind.call(Function.call, Array.prototype.concat);
|
||||
const keys = Object.keys;
|
||||
|
||||
if (!Object.entries) {
|
||||
Object.entries = function entries(O) {
|
||||
return reduce(keys(O), (e, k) => concat(e, typeof k === 'string' && isEnumerable(O, k) ? [[k, O[k]]] : []), []);
|
||||
};
|
||||
}
|
||||
@@ -0,0 +1,7 @@
|
||||
if (typeof Object.getPrototypeOf !== "function") {
|
||||
Object.getPrototypeOf = typeof "test".__proto__ === "object" ? function (object) {
|
||||
return object.__proto__;
|
||||
} : function (object) {
|
||||
return object.constructor.prototype;
|
||||
};
|
||||
}
|
||||
@@ -0,0 +1,13 @@
|
||||
if (!String.prototype.includes) {
|
||||
String.prototype.includes = function(search, start) {
|
||||
if (typeof start !== 'number') {
|
||||
start = 0;
|
||||
}
|
||||
|
||||
if (start + search.length > this.length) {
|
||||
return false;
|
||||
} else {
|
||||
return this.indexOf(search, start) !== -1;
|
||||
}
|
||||
};
|
||||
}
|
||||
Reference in New Issue
Block a user