js array clone clone clone replicate data

Little scum · Posted on 2020-5-18 11:39:28

There is an array of A, and I want to clone this array to get B, and I am modifying the value of array A, and I don't want to affect array B.

The code is as follows:

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When using slice, Object.assign to copy,Modifying the value of the test1 array will affect other arrays.As shown below:

How can you modify the original array without affecting other cloned arrays?

Solution 1

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Solution 2

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Continuation for anticipation · Posted on 2020-5-22 10:16:58

I generally implement it through JSON.parse(JSON.stringify(arr)), how does the efficiency of the two methods mentioned by the owner compare?

Little scum · Posted on 2020-5-22 11:12:51

Continued for anticipation Posted on 2020-5-22 10:16
I generally implement it through JSON.parse(JSON.stringify(arr)), how does the efficiency of the two methods mentioned by the owner compare?

Without comparison, I don't feel like it makes much sense.

You can compare the performance and send it out

[JavaScript] js array clone clone clone replicate data

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