Returns all elements in an array except for the first one.
const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);
tail([1, 2, 3]); // [2, 3] tail(); // 
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Checks if the elements of the first array are contained in the second one regardless of order.
Returns all the elements of an array except the last one.
Creates an array of elements, ungrouping the elements in an array produced by zip and applying the provided function.