/comp/ - Computers and Technology

Currently learning Java, I've no previous knowledge with programming and that slows me down to some degree but the progress I make keeps me happy and motivated.

I don't think I have any fixed projects yet, but making simple games and apps for android is something I would enjoy doing.

Just today I found something curious when making a simple text game, if anyone can help me out;

Why does this works fine:
do {
ignore = (char) System.in.read();
} while (ignore != '\n');
} while ( choice < '1' | choice > '3');

But this won't

do {
ignore = (char) System.in.read();
} while (ignore != '\n');
} while ( choice == '1' | choice == '2');

Why can't I have two equals separated by OR?
I'm sure it's a dumb question.

>>364
Yuck.. Java hurts my brain.

I don't know java… but you might be trying to use syntax of a different language that you just "picked up" from your readings somewhere.

Did you know the operator you are using "[|]" its logic is not "OR" it is instead logic " bitwise inclusive OR"?

Can you explain the difference between "logical OR" [||] , "bitwise inclusive OR" [|] , "bitwise exclusive OR" [^] ?

Some reading about [|] and [||]:
http://stackoverflow.com/questions/7101992/why-do-we-usually-use-not-what-is-the-difference

Anyway, goodluck. Pls let us know of your discoveries, I would like to know the answer too (to lazy to into java and figure it out myself)

I want to start learning C but K^R is kind expencive so I still haven't gotten anywhere. I wonder if the wikibooks are useable…

>>381

If you're interested, this guide is pretty good.

http://c.learncodethehardway.org/book/

>>382
I will take a look thank you

I just wrote a bash script to download all images from uboaru.

http://pastebin.com/DtvBhW50

>>364

>Why can't I have two equals separated by OR?
>I'm sure it's a dumb question.

I know this is late as fuck but whatever.
I don't know java but shouldn't it be something like this?

do {
ignore = (char) System.in.read();
} while (ignore != '\n');
} while ( (choice == '1') | (choice == '2') );

I only have very basic and limited knowledge of LUA, thanks to my noob days of Roblox.

I wanna someday pick back up on it again, as well as study Java and C++.

I'm learning pythong but I haven't even opened it for the past 4 weeks. I need motivation ;7;

i'm working on a debugger inspired by plan9's acid(1) but using lisp as language for the interactive loop; right now i'm working on the lisp dialect, but maybe i'll just embed a lightweight lisp or scheme. UNIX(tm)'s ptrace(2) is quite annoying, and so is DWARF (i won't support it any time soon), but it isn't really terrible, and on linux there's also /proc which is fine.
the whole thing is in C, but i'm considering ocaml or common lisp using FFIs, poring shouldn't be too hard.

>>364
This works because its including every number after one or every number under 3, right. Like x < 1 == 1 2 3 4 5… and x > 3 == 2 1 blah blah. while in the second one its only 1 or 3. To include 1 and or 3 you have to put greater or equal to signs right. So it should be x <= 1 || x >= 3 because that will include 1, 3 everything inbetween and before. At least I am pretty sure, I haven't programmed in a couple of months and the JVM is really retarded and confusing sometimes.

>>364
>Why can't I have two equals separated by OR?
I'm sure it's a dumb question.

Or this… I think you can dont you just need double bars? x || y. Idk I am pretty sure I have used double equals like that before.

>>516
I don't know java syntax at all, but considering it's based off C, the OR operator certainly should be a ||.

>>514
You better go through with this anon! The world needs something like this!

I've been working on this miniature wiki software for a while, in Python.

http://pariahsoft.com/pyww/