Prototype ¬ Detail

author: daafy [+], Submitted: 09.17.01 4a

// just verify an element is not already in before adding one.
array.prototype.addDistinct = function(val){
    for(var i = 0; i < this.length; i++)
       if(val == this[i]) return trace("element already in");
    return this.push(val);
}

usage

var myArray = new Array("Tic", "Tac", "Toe");
myArray.addDistinct("Tac") // => doesn't push
myArray.addDistinct("Jim") // => all right
this example is with strings but is of course ok with objects & else also.