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Generic type array shuffling based on @fincha solutions
using System.Collections.Generic;
using UnityEngine;
public static class EnumerableExtensions {
public static T[] ShuffleArray<T>(this T[] a) {
// Loops through array
for (int i = a.Length - 1; i > 0; i--) {
// Randomize a number between 0 and i (so that the range decreases each time)
int rnd = UnityEngine.Random.Range(0, i);
// Save the value of the current i, otherwise it'll overright when we swap the values
T temp = a[i];
// Swap the new and old values
a[i] = a[rnd];
a[rnd] = temp;
return a;
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munkbusiness commented Mar 20, 2018

All arrays automatically gets the shuffle method so you can access it on any array by simple calling anyArrayName.ShuffleArray();

Adapted from this gist by @fincha

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