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st98/Array#has.js

Last active August 29, 2015 14:06
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Array#has。
Raw
Array#has.js
Object.defineProperty(Array.prototype, 'has', {
value: function (value) {
return this.indexOf(value) > -1;
},
enumerable: false,
configurable: true,
writable: false
});
Object.defineProperty(Array.prototype, 'contains',
Object.getOwnPropertyDescriptor(Array.prototype, 'has')
);
//-----
[1, 2, 3].has(2); // => true
[1, 2, 3].has(4); // => false
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