shift

public T+ shift()

The first element of the array that was removed or undefined if there were no elements in the array.

Removes the first element of the array and returns the element. If there are no elements in the array, undefined is returned.

This method mutates the array.

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import System;   int[] arr = [ 1, 2, 3, 4 ]; Console.log(arr.first()); // 1 arr.shift();              // Removes first element Console.log(arr.first()); // 2

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import System;   int[] arr = [ 100, 200, 300, 400]; Console.log(arr.length);   // 4 Console.log(arr.shift());  // 100 Console.log(arr.length);   // 3