Completely off-topic, but I thought I’d post this up in case anyone searching has the same problem as me. I was trying to work out how to take an array, and remove duplicate (triplicate, etc, etc) entries.

Searched google for ages and could only find solutions which would remove only one ‘instance’ of a multiple entry and not the third, fourth, fifth etc, or only remove multiples of the same value if they were next to each other, or sort the array alphabetically and then test the value at index -1, which doesn’t really work either. Plus they were all loops within loops which always messes with my karma.

Anyway – I finally fixed it myself using the nice shiny new array.some() method in Actionscript 3.  Actually I suppose this also loops within a loop – but at least you don’t have to see it! Here’s the code:

//——————————————————————–

var originalArray:Array = new Array(“yellow”, “red”, “blue”, “red”, “yellow”, “green”, “yellow”, “purple”, “ginger”, “red”, “blue”);
var dedupedArray:Array = new Array();

function ArrayTest() {
for each (var colour:String in originalArray){
var tempValue:String = colour;
if(dedupedArray.some(hasDupes)==false){
dedupedArray.push(tempValue);
}
}
function hasDupes(element:String, index:int, array:Array):Boolean {
return (element == tempValue);
}

trace(“dedupedArray: “+dedupedArray);

}
ArrayTest();

//——————————————————————————

Dan will be proud of me!

This entry was posted on Friday, August 1st, 2008 at 11:55 and is filed under Off topic. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.