duplicate array
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| Language | JavaScript |
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| Owner | pheker |
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| Modified | |
| Visibility | Public |
Array.prototype.duplicate = function(){
return arr.concat(arr.slice(0));
}
var arr = [1,2,3,4,5];
console.log(
arr.duplicate()
);
console.log(arr);
// [1,2,3,4,5,1,2,3,4,5]
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