Removes value from an array

removeValue.js

function removeValue( v, a ) {
        if( a.length ) {
                var i = a.indexOf(v);
                if( -1 === i ) {
                        return a;
                }
                a.splice( i, 1 );
                return removeValue( v, a );
        }
        return a;
}

Or it can be done as an extension to an array prototype like this:

Array.prototype.removeByValue = function(value) {
    var i = this.indexOf(value);
    if( -1 === i ) {
        return this;
    }
    this.splice( i, 1 );
    return this.removeByValue(value);
}