Array.prototype.push = function() {

[muazzez]

I found this code on Internet:

 
<script type="text/javascript">

Array.prototype.push = function() {
    var n = this.length >>> 0;
    for (var i = 0; i < arguments.length; i++) {
        this[n] = arguments[i];
        n = n + 1 >>> 0;
    }
    this.length = n;
    return n;
};

</script>

Question 1: How to call this function?
Question 2: When I delete >>> 0, what I lose? ( >>>0 ı sildiğim zaman, ne kaybederim?)

[jtrelfa]

That code is a way to add the .push method to the native Array object in Javascript.

All A-grade browsers have this method already built-in, so the script you're showing is designed to allow for older browsers to also have this method available.

To use the push() method of the array object:

var a = ["apples","oranges"];
a.push("bananas"); //a = ["apples","oranges","bananas"]

HTH

[muazzez]

Thanks...
I add message

 
<script type="text/javascript">

Array.prototype.push = function() {
alert(this.length); // 4
    var n = this.length >>> 0;
    alert(n); // 4
    alert(arguments.length);  // 3
    for (var i = 0; i < arguments.length; i++) {
    alert(arguments[i]);
        this[n] = arguments[i];
        n = n + 1>>> 0;
    }
    this.length = n;
    return n;
};

var arr = ["aa","bb","cc","dd"];
arr.push("ee","ff","gg");
alert(arr); // aa,bb,cc,dd,ee,ff,gg
</script>

I delete >>> 0

 
<script type="text/javascript">

Array.prototype.push = function() {
alert(this.length); // 4
    var n = this.length ;
    alert(n); // 4
    alert(arguments.length);  // 3
    for (var i = 0; i < arguments.length; i++) {
    alert(arguments[i]);
        this[n] = arguments[i];
        n = n + 1 ;
    }
    this.length = n;
    return n;
};

var arr = ["aa","bb","cc","dd"];
arr.push("ee","ff","gg");
alert(arr); //  aa,bb,cc,dd,ee,ff,gg
</script>

Both of them display same messages. I think, >>> 0 is unnecessary.

[Pepejeria]

its basically IE 5 that didn't support push, so there is really no need to use that script.

[felgall]

If you are going to use it you should first check that push doesn't exist so as to not override the more efficient version built into almost all browsers.