Remove specific element from a javascript array?

delete array[i]

or

array.splice(i,1);

I may have misunderstood your question, and this might be what you want instead:

for(var i = array.length; i>=0; i--){
  if(array[i]==number){
   array.splice(i,1);
   break;
  }
}

Be aware that when you use delete for an array than you could get wrong results for anArray.length. In other words, delete would remove the element but not update the value of length property.

Be careful when you use delete for an array. It is good for deleting attributes of objects but not so good for arrays. It is better use splice for arrays.

Array.prototype.remByVal = function(val) {
    for (var i = 0; i < this.length; i++) {
        if (this[i] === val) {
            this.splice(i, 1);
            i--;
        }
    }
    return this;
}
//Call like
[1, 2, 3, 4].remByVal(3);

Depends on whether you want to keep an empty spot or not.

If you do want an empty slot, delete is fine:

delete array[ index ];

If you don't, you should use the splice method:

array.splice( index, 1 );

And if you need the value of that item, you can just store the return value:

var value = array.splice( index, 1 );

In case you want to do it in some order, you can use array.pop( ) for the last one or array.shift( ) for the first one (and both return the value of the item too).

And if you don't know the index of the item, you can use array.indeOf( item ) to get it (in a if() to get one item or in a while() to get all of them). array.indexOf( item ) returns either the index or -1 if not found.

You can always delete the specific element and filter out the array. It might need an extension of the array object for browsers that don't implement the filter method but in the long term its easier since all you do is this:

var my_array = [1,2,3,4,5,6];
delete my_array[4];
console.log(my_array.filter(function(a){return typeof a !== 'undefined';}));

Should display [1, 2, 3, 4, 6]