Coding Question And Answer Thread

[welcome to hell 23]

I have a few questions:

What would be the correct way of replacing elements in an array?

Converting Array to a text string?

Edit:

Nested Arrays?

Edited June 23, 2009 by Welcome To Hell

[rocket 9]

This was covered pretty well with ArmA, has been around a while. Since the latest ArmA patch you've even been able to publish them across multiplayer clients.

Check out the wiki for the toString and toArray commands.

A nested array is very simple, i.e:

_array1 = [["one_one","one_two"],["one_two","two_two"]];

If I wanted to set "one_two" to "blaa", I could go:

_array2 = _array1 select 1;

_array2 set [1,"blaa"];

_array1 set [0,_array2];

Biki has heaps on this if you're interested in that area.

[welcome to hell 23]

Thank you for the reply it helped a lot, i looked around biki some more, but i have another question.

How would i extract the data position from an array inside the nested array?

For example: here is the nested array:

_array = [ [1,2,3], ["m16","ak","g36"] ];

_myvar =  2;

How would i go about finding which pos (which is "1" in the first array) the var 2 is at?

And if i get the pos? How would i go about querying the second array?

Basically what i really want to know if is there is a simpler way of doing it than described above?

[Mike84 1]

if you mean the value 2, then use:

_array = [ [1,2,3], ["m16","ak","g36"] ];

_var = ((_array select 0) select 1);

basically the parenthesis manipulate the order of precedence (what gets evaluated first (innermost first)). So first it grabs the pos (i assume) array which is the 1st element of _array (array counting starts at 0)

[1,2,3]

and then its grabs the 2nd element from that array

2

[welcome to hell 23]

Thanks!

Ok example i have an array:

_array = [1,2,3];

how do i make it a variable = 123;

[Mike84 1]

I hope this is correct (latenight coding always gets me):

mk_fArrayToNumber = {
_arr = _this;   
_output = [];

{
	_output set[count _output, _x + 48]    
}forEach _arr;      
parseNumber(toString(_output))  
};

execute the function like so:

_numberValue = [1,2,3] call mk_fArrayToNumber;

[welcome to hell 23]

Thank you, i looked if there was function for it in BI functions but could not find a function for it!

[welcome to hell 23]

Is there another function that converts array to string? I played around with toString command and some loops, but i get some weird characters instead.

_array = [1,2,3,4,5]

So the output of the function would be:

_STRarray = "12345";

[Mike84 1]

It's because toString uses those numeric values as ascii values, that's why i'm doing a + 48 there.

If you absorb this table, you'll see why.

and to do that thing, just remove the parseNumber function call in the mk_fArrayToNumber function, so it won't be converted to an integer.

[welcome to hell 23]

Alright got it working.