working with arrays

[mattporritt]

is there a quick script to clear an array?
Something like

myArray.clearArray();

would be great.

any help would be great

Matt

[catbert303]

Hi,

you could just create a new array with the same name,

code:

---

var myArray = [];

---

[ninudesi]

The best way to go about this is usually to always set the value of the variable/array/etc. to null as explained by catbert303. Good advice from him :-)

[mattporritt]

ok, good advice.
I got it settled with a button that does this:

clear_btn.onRelease = function() {
for (i=0; i<_root.drinkArray.length; i++){
_root.drinkArray [i] = "";
}
drink_list.setDataProvider(drinkArray);
}

second question:

would

myArray[i] = [];

remove an element from my array?
would this effect the length of the array?

matt

[catbert303]

Hi,

myArray[i] = [];

wouldn't change the size of myArray, it would just mean at position i the element was an empty array. to remove the element at position i (and reduce the length of the array by 1) you could use the splice method,

myArray.splice(i, 1);

[mattporritt]

that's the thing.

so,

myArray.splice(0);

would clear the whole thing and shorten the length of the array to zero?

matt

[catbert303]

yep

[mattporritt]

cool thanks!

see the working thing

matt

[willyeago!]

i get some weird thing ahppenin whenever i use splice. the object i removed from the array, but it leaves an empty spot. after a while my array looks like [,,,,,,,,,]. why is it placing an empty spot?

[catbert303]

what does your splice code look like? splice can be used to remove elements from an array and also insert things in their place.

[willyeago!]

i use a getIndex function to find its index and set it to x.
so its

var x = getIndex(this);
eArray.splice(x, 1);

[catbert303]

what happens if you try testing a movie using,

trace("original eArray...");
trace(eArray.join("\n"));
var x = getIndex(this);
trace("x = " + x);
eArray.splice(x, 1);
trace("new eArray...");
trace(eArray.join("\n"));

[willyeago!]

oops, i defined getIndex as a prototype and was using it wrong.
so that mystery is solved
thanks catbert