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undo .shift() in an array

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undo .shift() in an array

by bigpumpkin » Mon Feb 04, 2013 11:30 pm

Anyone know a quick trick to restore the shifted array to its original? Doesn't seem to work with only .unshift().
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bigpumpkin

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Re: undo .shift() in an array

by XainPro » Tue Feb 05, 2013 10:52 am

Use it like This

var a = [1, 2, 3, 4];
a.unshift(0);
a; // => [0, 1, 2, 3, 4]

a.slice(0).unshift(0); // Use "slice" to avoid mutating "a".
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