Making an independent copy of a reversed array in JavaScript

Question

Here is my fiddle: http://jsfiddle.net/sepoto/Zgu9J/1/

I\'m starting with a reverse function:

function reverseArr(input) {
    var ret = new Array;
          


        

Answer 1

All you have to do is clone your array before you reverse it! :)

The shortest way to type is:

var b = a.slice();

But using concat is correct as well. See:

Javascript fastest way to duplicate an Array - slice vs for loop

If slice does not create a copy for you, you can use numpy arrays and create a deep copy this way:

np.copy(a);

see: http://docs.scipy.org/doc/numpy/reference/generated/numpy.copy.html