Javascript Basics - Swapping Elements in An Array
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This video will shows you how to use the swapping operation swap elements inside an array in place. We will also go over an example on how to take advantage of this operation to write our own reverse function on array. This operation is very useful during technical interview process. It will be used for sorting, reversing, transposing etc. for an array or array of arrays (nested array). There will be a follow up video for how to use swap operation to solve a transpose a 2D matrix video.
Here is what we are going to do:
let say we have an array [1,2,3,4]. We want to swap the 1 and 4 so the array will be [4,2,3,1].
In our reverse function we will reverse [1,2,3,4,5,6] to [6,5,4,3,2,1].