unshift Method
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unshift Method 

Inserts specified elements into the beginning of an array.

function unshift([item1 : Object [, ... [, itemN : Object]]]) : Array

item1, ... , itemN

Optional. Elements to insert at the start of the Array.

The unshift method inserts elements into the start of an array, so they appear in the same order in which they appear in the argument list.

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