Detecting if letter is lower or upper case

05-14-2006, 07:35 PM

EDIT: Ignore this thread, since it appears that a != A in a string comparison (now?). I was under the impression that a == A in WC3. This means that all of this is a complete waste of time; sorry.

I'm not sure if anyone has thought of this before, or indeed if it works, as I cannot test it, but in theory I think it should.

As far as I know, it is thought to be impossible to test if a letter in a string is upper or lower case. If it was possible, it would make save codes a lot shorter.

However, JASS is case sensitive. This means that the function stringA and stringa would be different functions, correct? This means that if we can run a trigger via a string, then we could have functions from a-z and A-Z, with them giving a boolean referring to if it is upper or lower case function.

Since ExecuteFunc takes a string, this could be used to find out if a letter is upper or lower case, if you made the required 52 functions.

05-14-2006, 07:44 PM	#2
PipeDream	JASS: function IsCharUpper takes nothing returns nothing return c == StringCase(c,true) endfunction

05-14-2006, 07:51 PM	#3
The_AwaKening	NIce, didn't know about that function. Will come in handy.

05-14-2006, 07:57 PM

Captain Griffen

Why is that function returning nothing and yet then returns something, which is an undefined variable (I don't know much JASS, but I do know several other programming languages)?

Why do Blizzard add stuff like this and then not tell anyone or put it into the patch notes?

EDIT: Okay, I was a little suspicious, so I checked around, and all StringCase does it turn a string either into upper case or into lower case - which ISN'T the same thing.

05-14-2006, 08:07 PM	#5
TaintedReality	What that function does is takes a string c (although it wasn't in Pipe's arguements, guessing he just forgot it). Then, it checks whether c is equal to an all uppercase version of c. If it is, it returns true (therefore being uppercase). If it's not, it returns false (therefore being lowercase).

05-14-2006, 08:15 PM

Captain Griffen

Quote:

native StringCase takes string source, boolean upper returns string

Takes a string, turns it to upper/lower case, returns string.

05-14-2006, 08:22 PM	#7
PipeDream	I recommend reading common.j. As far as I know StringCase is part of the original RoC API, but shrug.

05-14-2006, 08:22 PM	#8
TaintedReality	JASS: function IsCharUpper takes string c returns nothing return c == StringCase(c,true) endfunction I'm talking about that function. Read it again, I bet you'll get it =P.

05-14-2006, 08:26 PM

Captain Griffen

Ahh, yea, sorry, missed the double '=' (silly me). And for your information, that function was new in 1.13.

Do string comparisons actually test for the case? I was under the impression that they didn't, and that testing for the upper or lower case was impossible (hence why upper and lower case letters aren't used in save codes, despite the effectiveness they would have in reducing their length). If it does, then my memory is failing me and this thread is worthless.

05-14-2006, 08:27 PM	#10
TaintedReality	Never actually tried, but it would be easy to test.

05-14-2006, 08:30 PM	#11
iNfraNe	The jass still isnt correct, it should return a boolean: JASS: function IsCharUpper takes string c returns boolean return c == StringCase(c,true) endfunction

05-14-2006, 08:31 PM	#12
Captain Griffen	Can someone test this for me (at present I can't)? Wondering if I'm going insane here...

05-14-2006, 08:35 PM	#13
PipeDream	Upper and lower case characters are distinguished. Part of the preprocessing for Aftermath's save system is to StringCase(playername,false).

05-14-2006, 08:39 PM	#14
Captain Griffen	Strange, guessing it got changed some time (haven't done anything with save codes for a long time). Or my memory is tricking me. Never mind.

05-15-2006, 04:11 PM

#15

The)TideHunter(

Quote:

Originally Posted by iNfraNe

The jass still isnt correct, it should return a boolean:

JASS:

function IsCharUpper takes string c returns boolean
    return c == StringCase(c,true)
endfunction

That function does return a boolean, return (c == StringCase(c,true))
meaning:

JASS:

return (c == StringCase(c,true))

is the same as:

JASS:

if(c == StringCase(c,true)) then
    return true
endif
return false