How to change array key in javascript

Question

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Javascript swap array elements

For example i have an array var arr = ['one', 'two', 'three']; and i wona to replace 1st key to 2nd and my array should start to look like ['two', 'one', 'three']; how can i do that, it need to me for bubble sorting

Answer 1

var arr = ['one', 'two', 'three'],
    temp;

temp = arr[1]; // temp is 'two'
arr[1] = arr[0]; // Now it is ['one', 'one', 'three']
arr[0] = temp; // And now it is ['two', 'one', 'three']

Just use a temporary variable.

Demo