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My arraylist class
Posted: Tue Jul 31, 2007 12:03 am
by thetarget
Code: Select all
function ArrayList() {
this.a_list = new Array(); function add(value) {
var currentIdx = this.size();
this.a_list[currentIdx] = value;
}
function get(idx) {
return this.a_list[idx];
}function remove(idx) {
for (x = idx; x < this.a_list.length; x++) {
this.a_list[x] = this.a_list[x+1];
}
this.a_list[this.a_list.length-1] = null;
}function size() {
var t_size = this.a_list.length;
if (t_size > 0 && this.a_list[this.a_list.length-1] == null) {
t_size--;
}
return t_size;
}function move(idxFrom,idxTo) {
var t_value = this.a_list[idxFrom];
//direction: move down
if (idxFrom < idxTo) {
for (x = idxFrom; x < idxTo; x++) {
this.a_list[x] = this.a_list[x+1];
}
this.a_list[idxTo] = t_value;
} else if ( idxTo < idxFrom) { //direction: move up
for (x = idxFrom; x > idxTo; x--) {
this.a_list[x] = this.a_list[x-1];
}
this.a_list[idxTo] = t_value;
}
}
function exchange(idxChange,idxWith) {
var t_value = this.a_list[idxWith];
this.a_list[idxWith] = this.a_list[idxChange];
this.a_list[idxChange] = t_value;
}
this.move = move;
this.remove = remove;
this.get = get;
this.add = add;
this.size = size;
this.exchange = exchange;
}
Available for download here:
arraylist.js
Just to make arrays more neat and simple. I created this Arraylist class myself.. Using with not much problem(there are still problems tho)
Any problems faced when using it, please post it here so that i can improve on it
thanks
Posted: Tue Sep 04, 2007 7:54 pm
by Gyanu
WHT it this?
Posted: Wed Sep 05, 2007 7:12 am
by Lixas
This is a javascript function, to work with javascript arrays. these functions can:
- Get a value of specific array item.
- Swap to items
- move items
GYANU, i have a golden rule: if you don't know what is that, probably you don't need that :P
Note for developer: you should more comment your code, because sometimes it is difficult to understand what is going on
by the way, it's nice. develop it further and maybe you will do best JS class to work with arrays.
Posted: Sun Sep 09, 2007 7:38 pm
by Flipper3
I am confused though...can't you use arrays without that code?
Posted: Fri Sep 14, 2007 2:06 pm
by Lixas
sure you can, but if you want to manipulate with the, so you have to code your own functions. These are already-made functions for manipulating arrays in JS
Posted: Sat Sep 15, 2007 9:30 pm
by Flipper3
Lixas wrote:sure you can, but if you want to manipulate with the, so you have to code your own functions. These are already-made functions for manipulating arrays in JS
Ok...I am
really lost because I never really use JS. :/
Why would you manipulate arrays and what does that even mean? :/
Posted: Sun Sep 16, 2007 9:09 am
by Lixas
if you are creating a little bit sophisticated software, you probably will have to use arrays (I'm talking about every kind of programming languages: php, c++, delphi, JS or whatever else). So, these are pre-made functions for you to work with arrays in javascript language.
i will try to illustrate with an example:
we have an variable with array of digits:
for example you don't really know what is third member of array, so you can use function
get(item_on_array)
and you will have variable
third_member is equal to
5
the same are with other functions.
Posted: Sun Sep 16, 2007 3:51 pm
by Flipper3
Ahh!!! I get it now. Thanks!!!
