JavaScript array element, add two functions to array, implement Delete function __ function

An array of JavaScript does not seem to have a default function to delete elements, when colleagues asked the next Google, found that there is no, continue to the valley to delete elements you need to do the following three steps:

1. Delete element

2. Index of all elements after the deletion of the element-1

3. Array Length-1

According to the three-step strategy above, the prototype of the lower array is expanded, and two functions are added to remove the array, which, of course, does not consider the performance issue for the time being, just to meet the daily use. The code is as follows:

<script language= "JavaScript" >

Array.prototype.removeitems=function () {

if (Arguments.length = = 0) {

Return

}else{

for (var idx in arguments) {

for (Var i=0,n=0;i<this.length;i++) {

if (!) ( THIS[I]==ARGUMENTS[IDX])) {

This[n++]=this[i];

}

}

This.length-=1;

}

}

}

Array.prototype.removeindex=function () {

if (Arguments.length = = 0) {

Return

}else{

for (var idx in arguments) {

if (isNaN (Arguments[idx])) {

Continue

}

for (Var i=0,n=0;i<this.length;i++) {

if (!) ( I==ARGUMENTS[IDX])) {

This[n++]=this[i];

}

}

This.length-=1;

}

}

}

Test code

var dd = new Array ();

Dd[0]= ' a ';

Dd[1]= ' B ';

Dd[2]= ' C ';

Dd[3]= ' E ';

Dd.removeitems (' B ', ' a ');

Dd.removeindex (1,2);

Alert (DD);

</script>

The removeitems function deletes the corresponding element values in the array, passing more than one argument and defaults to no processing when the argument is not passed.

The Removeindex function deletes the element value of the corresponding index in the array, passing multiple arguments and ignoring the arguments when the parameter is not passed or the length is tasted, when the argument is not passed by default.