Add an element to the object array with unshift

arrayObject.unshift(newelement1,newelement2,....,newelementX)

Parameters	describe
newelement1	It's necessary . The first element added to the array .
newelement2	Optional . The second element added to the array .
newelementX	Optional . Several elements can be added .

 

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explain ：

unshift() Method will insert its parameters into arrayObject The head of , And move the existing elements to the higher subscript successively , To make room for . The first parameter of this method will be the new element of the array 0, If there's a second parameter , It's going to be a new element 1, And so on .

Please note that ,unshift() Method does not create a new creation , Instead, modify the original array directly .