Function shuffleArray

shuffle a 1D array via mutation. the ordering of elements will be randomized by the end.

import { assertEquals, assertNotEquals } from "jsr:@std/assert"

const
	range_100 = Array(100).fill(0).map((_, i) => (i)), // sequntially numbered array
	my_arr = range_100.slice()
shuffleArray(my_arr) // shuffling our array via mutation

// the shuffled array is very unlikely to equal to the original unshuffled form 
assertNotEquals(my_arr, range_100)
// sort the shuffled array to assert the preservation of the contained items
assertEquals(my_arr.toSorted((a, b) => (a - b)), range_100)
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