Recursively flatten an array or arrays. This is the fastest implementation of array flatten.
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Returns an array with only the unique values from all given arrays using strict equality for comparisons.
:milky_way: nano library to enhance String.substring / Array.slice with python slice style by Proxy.
Return the last element in an array. Faster than `.slice`
Return true if a value exists in an array. Faster than using indexOf and won't blow up on null values.
Get the first element or first n elements of an array.