[geran]

If I got list with char's, how should I write a funtion to get that list to a int?

ex:

I want this list:

-val chList = [#"5",#"1",#"2"];
>val chList = [#"5",#"1",#"2"] : char list

to this int:

512

the type of that funtion should be:

char list -> int

[Camelot]

Assuming you're working with digital numbers, the obvious way would be to iterate through the list multiplying the current value by 10 and adding the new digit.

I don't know what language you're using, but a AppleScript-based model could be:

Code:
set theList to {"5", "1", "2"}
set theResult to 0

repeat with i from 1 to (number of items in theList)
	set theResult to theResult * 10
	set theResult to theResult + (item i of theList as number)
end repeat
theResult

I've used AppleScript as an example because it's the easiest to understand and therefore translate into other languages, but the principle should be the same.

Of course, good code would add error handling, bounds checking, etc.