How to iterate over an array and remove elements in JavaScript [duplicate]

Start from the top!

var elements = [1, 5, 5, 3, 5, 2, 4];for(var i = elements.length -1; i >= 0 ; i--){    if(elements[i] == 5){        elements.splice(i, 1);    }}

You could use the filter method here:

var elements = [1, 5, 5, 3, 5, 2, 4].filter(function(a){return a !== 5;});//=> elements now [1,3,2,4]

Or if you don't want to touch elements:

var elementsfiltered   ,elements = [1, 5, 5, 3, 5, 2, 4]                .filter( function(a){if (a!==5) this.push(a); return true;},                         elementsfiltered = [] );   //=> elementsfiltered = [1,3,2,4], elements = [1, 5, 5, 3, 5, 2, 4]

See MDN documentation for filter

Alternatively you can extend the Array.prototype

Array.prototype.remove = Array.prototype.remove || function(val){    var i = this.length;    while(i--){        if (this[i] === val){            this.splice(i,1);        }    }};var elements = [1, 5, 5, 3, 5, 2, 4];elements.remove(5);//=> elements now [1,3,2,4]