The implementation code for cloning an array in JavaScript

Source: Internet
Author: User

This article mainly introduces the implementation code for cloning an array in JavaScript. Need friends can come to the reference, I hope to help you

08 A Company JS interview questions, the position is JavaScript engineer (to Google) interviewer asked me how to clone an array, then think of the next JS object without the Clone method, Java object has.   So how do we get a new array? I replied: Use a loop to push the source array elements into the new array in turn.   This is the easiest way, but it's obviously not the answer the interviewer wants. Finally told me: the use of array slice method.    Examples are as follows: The code is as follows: var ary = [1,2,3];//source array var ary2 = ary.slice (0);//Clone a new array console.log (ARY2);  /* Change Ary2, does not affect the ARY, the description is indeed two arrays rather than reference * If two references, then any one of them is to the same array operation * * ary2[0] = 10;  Console.log (Ary2); Console.log (ary);
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