Clean way to remove element from javascript array (with jQuery, coffeescript)

CoffeeScript:

Array::remove = (e) -> @[t..t] = [] if (t = @indexOf(e)) > -1

Which simply splices out the element at position t, the index where e was found (if it was actually found t > -1). Coffeescript translates this to:

Array.prototype.remove = function(e) {
    var t, _ref;
    if ((t = this.indexOf(e)) > -1) {
        return ([].splice.apply(this, [t, t - t + 1].concat(_ref = [])), _ref);
    }
};

And if you want to remove all matching elements, and return a new array, using CoffeeScript and jQuery:

Array::remove = (v) -> $.grep @,(e)->e!=v

which translates into:

Array.prototype.remove = function(v) {
    return $.grep(this, function(e) {
        return e !== v;
    });
};

Or doing the same without jQuery's grep:

Array::filterOutValue = (v) -> x for x in @ when x!=v

which translates to:

Array.prototype.filterOutValue = function(v) {
    var x, _i, _len, _results;
    _results = [];
    for (_i = 0, _len = this.length; _i < _len; _i++) {
        x = this[_i];
        if (x !== v) {
            _results.push(x);
        }
    }
    return _results;
};

Using vanilla Javascript:

Array.prototype.remove = function(elem) {
    var match = -1;

    while( (match = this.indexOf(elem)) > -1 ) {
        this.splice(match, 1);
    }
};

var a = [4, 8, 2, 3];

a.remove(8);

Only jQuery:

jQuery.removeFromArray = function(value, arr) {
    return jQuery.grep(arr, function(elem, index) {
        return elem !== value;
    });
};

var a = [4, 8, 2, 3];

a = jQuery.removeFromArray(8, a);

This is really easy with jQuery:

var index = $.inArray("value", myArray);
if(index != -1)
{
  myArray.splice(index, 1);
}

Notes:

splice returns the elements that were removed, so don't do myArray = myArray.splice(). myArray.splice(index,1) means "remove the array element at index 'index' from the array".

$.inArray returns the index in the array of the value you're looking for, or -1 if the value isn't in the array.