javascript array unshift some elements

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I have two arrays. The first array contains some values while the second array contains some elements which should be inserted to the first array. For example:

var aArr = [ {'a':111}, {'b':222}, {'c':333} ... ]
var bArr = [ {'x': 0}, {'y': 0} ] // I'm not sure it's length 

// finail I need got something like 
var aArr = [{'x': 0}, {'y': 0}, {'c':333} ...]

and bArr array is not sure it's length ,maybe it has one element

var aArr = [ {'a':111}, {'b':222}, {'c':333} ... ]
var bArr = [ {'x': 0} ] 

// finail I need got something like 
var aArr = [{'x': 0}, {'b': 222}, {'c':333} ...]

I use splice() which not work very well

var a = [1, 2, 3],
    b = [4, 5];

function prependArray(a, b) {

    a.splice(0, b.length, b);
    return a;
}

var result = prependArray(a, b);
// result =  [[4, 5], 3]  not  [ 4, 5, 3]

What should I do? ? I need more efficient method, because the aArr have more than 3000 values, and bArr have more than 100 values.

thanks.

asked 41 secs ago

M.D

1

javascript array unshift some elements