jQuery AS3中的each（）函数

Question

Though flash is dying technology I still have to finish my project :)))

How to implement for each loop in AS3 that gives me the index of the element in the array, much like the jquery each() function does it

jQuery.each( collection, callback(indexInArray, valueOfElement) )

I use this

for each(var myObj:* in myArray)
{ 
     // do some stuff with myObj
}

How to use stateme like this myArray.splice(index, 1) in for each???

Or is it possible at all?

Answer 1

jQuery's .each() is just an object iterator that does some additional checking for you. You should be able to get away with a syntax like:

var i = 0;
for ( property in object ) {
    callback( i++, object[property] )
}

Though, I don't know how AS3 works, but keep in mind that there is no order to object properties in JavaScript.

Answer 2

This would work.

var arr:Array = new Array();
arr[1] = true;
arr[5] = true;
arr.forEach(function (item:*, index:int, array:Array)
{
    if(item != undefined)
    {
        callback(index, item);          
    }        
});

Answer 3

Why not using the forEach function belonging to the Array object that will executes a function on each item in the array.

Here a live sample using it : http://wonderfl.net/c/mLhCM

ex:

var ar:Array = ["hello", 1, "world", 2];
ar.forEach(
   function(elm:*, index:int, arr:Array):void {
            trace("got elm : "+elm+" at index : "+index);
   }
);

Answer 4

Why not simple for...in loop:

var arr:Array = [2,1,5,0,0,0,87,8,110];

for (var i:String in arr)
{
    trace("Value:" + arr[i] + " at " + i);
}

Answer 5

Do you mean something like this?

for(var i:int=0; i<myArray.length; i++){
    var myObj = myArray[i];
}

it's hard to know exactly what to use unless you specify what you wish to achieve :)

Answer 6

a "for each" should not be used to iterate through an indexed array, the standard for(var i=0;xxx;xxx) should be used.
If for whatever reason you still find yourselff needing a for each loop then this would be how to get the index

var arr:Array = ['00','11','22','33','44','55','66','77','88','99']
for each(var o:Object in arr){
    trace(arr.indexOf(o))
}

Another option would be to use the for in loop

for (var key:String in arr){
    trace(key)
}