How to shift and unshift using javascript?
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Answer / Aakriti Sharma
The shift() method removes the first element from an array and returns that element. The unshift() method adds one or more elements to the beginning of an array and returns the new length of the array. For example: var arr = [1, 2, 3]; arr.shift(); // removes 1 and returns 1, arr.unshift(0); // adds 0 at the beginning and returns 4
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