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Comments:
<0> have the select's pre-written
<1> Ok. Lets look at the address pointer.
<1> lets say you need to write a function that returns two ints.
<1> I'm using return in a loose sense of the word.
<1> How would you do it?
<1> as in, what function prototype would you use?
<0> ermm..., I think it'd be void myfunction(int &num1, int &num2);
<1> Almost.
<1> void myfunction(int *num1, int *num2);
<0> ah crap, it's the calling that you p*** the address
<1> then, when yo uwant to call myfunction, suppose you have two normal ints.
<1> inta, and intb.
<1> yeah. & as in a, as in address. ;)
<1> so if you had int a, b; you'd call:
<1> myfunction(&a, &b);
<0> yea
<1> then, myfunction gets the address to the pointers, and can modify them. :)
<0> been doing this web scripting too damn long :)
<1> you probably wouldn't want to return void, btw. You'd likely use it for error handling.
<2> bored: I just followed the instructions on that post, and then ran the xfree config and it still came up point to /dev/input/mice
<2> which has no devices detected according to cat
<1> can you show me a simple loop to iterate through a string?
<1> say char * string;
<0> lookingfordistro, sorry, but now I'm stuck. I don't have a linux box to refer to that has a mouse attached
<2> shiite
<0> jblack, I ***ume you mean with pointers
<1> if you're not sure offhand, that's fine.
<1> Yeah, with pointers. ;)
<0> 2 secs, gotta think
<1> No problem
<0> ooh, C or C++?
<1> Lets say C99
<2> isn't it something like, for (char; char < char_end; char ++)
<2> <command>
<1> that should make it easy for you.
<2> next char;
<0> jblack, easier
<1> lookingfordistro: nope. :)
<2> I tried.
<1> Boredboy: Ok. I'm not teasing.
<1> it should look something like:
<0> for(i = 0; i < strlen(mystring); i++) { printf("char %d = %c", i, mystring+i); }
<0> actually that might be &mystring+i
<1> for (char * ptr = string; ptr =! NULL && * ptr != '\0'; ptr++) { something; }
<2> heh, I'm not too sharp on C++ as I just started learning it.
<2> I'm evolving from VB.****
<1> That's not an optimal expression mind you, but its bried enough for irc.
<1> s/=!/!+
<0> jblack, heh, dunno if I've ever tried it like that before
<1> lsd fl;kasd fjl;
<1> != rather than =!
<1> Ok. I understand where you're at.
<1> You have a conceptual undersatnding of what pointers are, but you're lacking practice.
<0> you're not kidding :)
<1> Your C is also weak.
<1> I suggest you not jump into threading in C. You've got to have a very comfortable understanding of working with memory before you start dealing with locking and contention.
<1> bad things happen in a threaded program in which one thread reads and another thread writes the same variable on an smp system.
<0> jblack, yea, need to get back into it properly before I start doing threading. Main reason for looking at threading is I'm working on a system at the moment that takes feeds from web. One thing is downloading of images. thought multiple threads might be useful so I could download multiple files at once instead of sequencial
<1> Oh, for something like that, I'd use forking.
<0> but then again, it's just a theory
<1> Its a simpler model to deal with.
<1> And you do have fork in languages such as python and perl. :)
<1> hell, even bash
<0> jblack, true. now that's definately something I'd have to read up on again. haven't done that in years
<1> You won't have trouble with it.
<1> fork();
<1> pardon.
<1> child = fork();
<1> then, if the child is 0, then you're the child. if its not 0, you're the parent.
<1> And they're two seperate processes.
<1> the healing side to that is wait(child).
<0> anyway, I don't think the project manager would go for it anyway, but we'll see
<1> the parent's job will be to watch the children, keeping a certain number going at a time, and to reap them with wait when they're ready.
<1> actually, its waitpid, not wait
<0> heh, definitely need to re-read (learn) this stuff again
<1> At least your honest that you need to learn it.
<1> what chaffs my *** is when someone says "I knew it, but forgot".
<1> because they almost never have. They really need to go from the start, but won't admit it. So you have to pretend that you're teaching something advanced when its really a beginner thing.
<1> Kind of like my ex-wife and algebra. She didn't know basic math very well.
<1> so every time she hit a fraction, she fell apart.
<0> unfortunately I haven't had a real requirement to do any decent sized C (or C++) apps in the past few years. In fact I think the last decent one was a backend email app that worked with oracle. that must have been 6-7 years ago
<0> jblack, anyway, nice to know some of what I've forgotten. Better get back to work ...
<1> yup. some other time.
<1> i'll be happy to help you pick something back up once you can make the time investment and you promise to be serious about it
<3> who wants some CADE ?
<1> is it like lemonade?
<3> apple juice actually
<4> CADE -> Canadian ***ociation of Drilling Engineers
<4> sounds relevant to linux! ey?
<4> Al-Ashtar: what're you doing up late?
<3> Cognition: I have to stay up so that I would go to work
<0> jblack, thanks. Once I stop working 60+ hrs a week, I'll get back to you
<1> What I'd raelly like is to find a mentee that would be interseted in working on bigsister.
<3> Vista has been hacked by a girl
<0> jblack, do I dare ask what bigsister is?
<1> Is the gender germane?
<4> mentee? usually people look for experts
<1> Cognition: think intern.
<3> alias update="sudo apt-get update;sudo apt-get dist-upgrade"
<2> boredboy: I got it working!
<3> is this a good idea ?
<2> I had to reconfigure everything by hand
<0> lookingfordistro, congrats
<2> thanks for your help!
<0> lookingfordistro, no problem
<4> Al-Ashtar: hmm, aliases have better uses, but why not
<4> Al-Ashtar: aliases are just conveniences, for lazy people :)
<3> yeah I'm lazy
<4> personally, i would write a full script
<4> because what if you get a return value that is not zero
<4> think robustness
<4> Al-Ashtar: how good are you with scripting nowadays?
<3> not good
<5> okay now I have a handle I can stick with
<3> but I can _maybe_ understand a script when I see one
<4> Al-Ashtar: but you have the basics down i ***ume, functions and declarations and shells and subshells and stuff like that right?
<3> Cognition: I'm fine, thanks for asking how about you ?
<4> Al-Ashtar: oh comeon :) i'm sure you know that much
<3> I really don't
<4> Al-Ashtar: well then, why not start with tldp, they have a very good intro
<4> Al-Ashtar: -> http://www.tldp.org/LDP/Bash-Beginners-Guide/html/index.html
<3> this is very bad.
<3> when you start reading about something
<3> another interesting thing comes up
<3> so you leave what you were reading before thinking it's less important
<4> Al-Ashtar: i thought that was a good thing
<3> and you start reading the new one
<4> Al-Ashtar: actually, you read both things
<3> I can't
<4> Al-Ashtar: lazy lazy lazy
<3> My brain is CoreSolo
<3> no multi-threading
<4> wow, you know about multi-threading now
<3> I've read a small bit about it :/
<4> ok, let's see your skill
<4> what's a thread?
<3> it's a thin line that when put together you can make a T-shirt
<4> LOL
<4> Al-Ashtar: you never cease to surprise
<4> Al-Ashtar: ok, here is a quick definition
<3> a fine cord of twisted fibers (of cotton or silk or wool or nylon etc.) used in sewing and weaving
<4> Al-Ashtar: a thread is an instance of a process
<3> ali@Ubuntu:~$ wtf is thread
<3> Gee... I don't know what thread means...
<4> Al-Ashtar: depending on the operating system (which might differ) the usual implementation is that a process needs at least one thread
<3> yeah I know this
<3> a thread is a process
<4> Al-Ashtar: so, when you are running a process that you can view with ps, you are actually viewing an instance, which is a thread
<4> so, the next question becomes, what's the difference between a process and a thread?
<3> a process is the command, and a threat is what the cpu uses to execute that command ? :/
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