Js deletes an array instance by specifying a subscript or an element. js subscript

Js deletes an array instance by specifying a subscript or an element. js subscript

Example:

Deletes the Array element Array of the specified subscript. prototype. del = function (index) {if (isNaN (index) | index> = this. length) {return false;} for (var I = 0, n = 0; I <this. length; I ++) {if (this [I]! = This [index]) {this [n ++] = this [I] ;}} this. length-= 1 ;}; Delete the specified element Array. prototype. indexOf = function (val) {for (var I = 0; I <this. length; I ++) {if (this [I] = val) return I;} return-1 ;}; Array. prototype. remove = function (val) {var index = this. indexOf (val); if (index>-1) {this. splice (index, 1) ;}}; function a () {var arr = [1, 2, 3, 4, 5]; alert (arr. toString (); arr. remove (3); alert (arr. toString ());}

Method 1

Arr. del (0 );

The above is all the content of the js instance that deletes an array by specifying a subscript or a specified element ~