How can add element to array in AS3?

Question

How can add element to array in ActionScript3

If i have an array:

var myArray:Array;

How can add element to this array "myArray", something like this:

myArray[] = value;

My second question is: How can compare if variable value exist in array element value?

Something like in_array function in php

livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/Array.html — TM_
– TM_, Commented Jul 10, 2011 at 21:24
My second question is: How can compare if variable value exist in array element value? Something like in_array function in php — Faraona
– Faraona, Commented Jul 10, 2011 at 21:26
Voted to close. User did not do any research before asking question. — J_A_X
– J_A_X, Commented Jul 11, 2011 at 14:36
@Faraona can you change the accepted answer to the highly upvoted one? I'd like to remove my answer but cannot because it is the accepted answer. While my answer isn't incorrect, it isn't as complete and people are inappropriately using downvotes to express that the other answer is better. — user562566
– user562566, Commented Sep 1, 2015 at 12:32

Michael Antipin · Accepted Answer · 2020-02-07 17:17:14Z

28

1. All of these are different ways of adding item to array.

someArray.push(someValue); : add last item
someArray.unshift(someValue); : add first item
someArray[index] = someValue; : set item somewhere
someArray.splice(index, 0, someValue); : insert item somewhere

2. Checking if a value is present in array.

if (someArray.indexOf(someValue) == -1) { /*value is not present*/ }

Refer to ActionScript language reference on Adobe livedocs.

edited Feb 7, 2020 at 17:17

answered Jul 10, 2011 at 21:29

Michael Antipin

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2 Comments

Jono Over a year ago

Thanks. Comprehensive, but brief.

user562566 Over a year ago

Nate... indexOf.. IS looping. Inside indexOf, the VM is doing a loop. How else would it know what the index of an item is? Magic?

score 4 · Accepted Answer · 2014-06-23 07:24:50Z

4

To answer both your questions here, you can add to an array by direct access or by the push() method, like so:

myArray[7] = something;

or

myArray.push(something);

Also as Nox noted, you can use the splice method as well to add in elements. This method is used to delete N amount of elements at a specific index, but you can also simultaneously inject one or more elements at the same index.

For your second question about how to check values or compare them in an array, here is one method:

var i:int = 0;

for(i; i < myArray.length; ++i){
    if(myArray[i] == 10){
       trace('found');
    }
}

edited Jun 23, 2014 at 7:24

answered Jul 10, 2011 at 21:31

user562566

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