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Thread Rules 1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution. 2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20) 3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible. 4. Use [code] tags to format code blocks. | ||
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Manit0u
Poland17393 Posts
On February 27 2015 17:32 Blisse wrote: how do yall balance working with all the other stuff you wanna do? i balance it by not sleeping but i feel like there's a better way... I don't do half the stuff I want to do :/ | ||
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Umpteen
United Kingdom1570 Posts
Is there a term for bugs where several different errors in the code all cause the same or similar symptoms, so that when you find and fix one, the problem doesn't seem to go away? | ||
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sabas123
Netherlands3122 Posts
On February 27 2015 17:32 Blisse wrote: how do yall balance working with all the other stuff you wanna do? i balance it by not sleeping but i feel like there's a better way... in my case I convince my teachers that they should let me do the things I want to do. I geuss that would be a big bug? since you have to fix all to get rid of the symptoms. does anybody know how I can set my stuff up in a way that I only need to recompile 1 file for a change to work instead of my entire project over and over again? | ||
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FFGenerations
7088 Posts
so the next thing i wanna do is take an xml string and parse it into a java object class. there is a class generator here http://pojo.sodhanalibrary.com/ where you paste in sample xml and it designs a class for you however some of my sample xml data uses & instead of & which causes it to be invalid xml apparently. for example the anime + Show Spoiler + <anime href="/encyclopedia/anime.php?id=210">Rurouni Kenshin: Trust & Betrayal (OAV)</anime> my question is, when my system receives the xml string (by requesting from external api), should it first validate it? so it would be like 1) request xml from external API 2) search the string for "<warning>no result for anime=uuu</warning>" and if this is the case then don't try to parse the result into an object (or parse it into a different object...or do something with it different...) 3) search the string for "&" and replace them with "&" 4) (parse into object) (just got out of bed so will look into this myself obv :D ) | ||
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Ropid
Germany3557 Posts
On February 28 2015 00:52 sabas123 wrote: does anybody know how I can set my stuff up in a way that I only need to recompile 1 file for a change to work instead of my entire project over and over again? You could use this: http://www.gnu.org/software/make/ If you set up a make file, that make tool will only compile the changed .c files into .o files, but will leave the unchanged files alone. You can't avoid the linker step, that has to be done each time. To speed up the linker, there's the normal one "ld" and an alternative named "gold" (has the filename ld.gold). That ld.gold can use all CPU cores and stuff. You can have gcc use it by adding "-fuse-ld=gold" to the command line. Adding "-pipe" is also interesting as it makes it so the various processes pipe their output/inputs together instead of using temp files. I bet there's also a much nicer and easier to use tool than that ancient "make" one, but if you just use an example file to start, it's probably not that annoying. EDIT: Another thing! You can use clang instead of gcc. It's faster and its error messages are nicer. It can be pretty much a perfect replacement for gcc, exact same command lines often work, etc., so there's nothing to learn really. I also just remembered "ccache". That's a wrapper that will call the compiler and cache the output. If the input files didn't change, it will use the output from its cache instead of starting the compiler. Using that might be an alternative to a make system. You have nothing you need to learn really with ccache. You are using it by replacing gcc and g++ with links to the ccache executable. It looks like this in practice: $ which gcc g++ clang clang++ /usr/lib/ccache/bin/gcc /usr/lib/ccache/bin/g++ /usr/lib/ccache/bin/clang /usr/lib/ccache/bin/clang++ That's just the /usr/lib/ccache/bin directory added to the front of $PATH. | ||
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Oshuy
Netherlands529 Posts
On February 28 2015 01:20 FFGenerations wrote: my question is, when my system receives the xml string (by requesting from external api), should it first validate it? Always validate your inputs first, unless you know the component you use has a reliable validation to protect it against external attacks. Since checking the components you use is often more work than making the validation yourself anyway, always validate your inputs first. | ||
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sabas123
Netherlands3122 Posts
On February 28 2015 01:29 Ropid wrote: You could use this: http://www.gnu.org/software/make/ If you set up a make file, that make tool will only compile the changed .c files into .o files, but will leave the unchanged files alone. You can't avoid the linker step, that has to be done each time. To speed up the linker, there's the normal one "ld" and an alternative named "gold" (has the filename ld.gold). That ld.gold can use all CPU cores and stuff. You can have gcc use it by adding "-fuse-ld=gold" to the command line. Adding "-pipe" is also interesting as it makes it so the various processes pipe their output/inputs together instead of using temp files. I bet there's also a much nicer and easier to use tool than that ancient "make" one, but if you just use an example file to start, it's probably not that annoying. EDIT: Another thing! You can use clang instead of gcc. It's faster and its error messages are nicer. It can be pretty much a perfect replacement for gcc, exact same command lines often work, etc., so there's nothing to learn really. I also just remembered "ccache". That's a wrapper that will call the compiler and cache the output. If the input files didn't change, it will use the output from its cache instead of starting the compiler. Using that might be an alternative to a make system. You have nothing you need to learn really with ccache. You are using it by replacing gcc and g++ with links to the ccache executable. It looks like this in practice: $ which gcc g++ clang clang++ /usr/lib/ccache/bin/gcc /usr/lib/ccache/bin/g++ /usr/lib/ccache/bin/clang /usr/lib/ccache/bin/clang++ That's just the /usr/lib/ccache/bin directory added to the front of $PATH. so if I change bla.o by recompiling bla.cpp then there is to see the change in the program itself I have to recompile it no matter what?T_T also with a make file, can I put it up that it will take an argument only compile the file of the argument? thanks for the post btw^^ | ||
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sabas123
Netherlands3122 Posts
I need to pass an int to a timer that only accepts a void pointers. and I have to do that through an other function any idea how?? the current result below is a random between 0 and ~32500. + Show Spoiler + SDL_TimerID runningMarioTimer; int can_time=1; uint32_t nextRunningMarioClip(uint32_t interval,void* max){ int magic = *(int *) max; printf("magic:%d \n" ,magic); can_time=1; return 0; } void runningMarioClipTimer(void *max){ runningMarioTimer=SDL_AddTimer(300,nextRunningMarioClip,max); } void marioRunningRender(int x, int y){ int number =3; //start the timer for the next clip if(can_time==1){ runningMarioClipTimer(&number); can_time=0; } } edit to compile you have to include sdl_timer and init it. will fix the code later | ||
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Ropid
Germany3557 Posts
Yes, you can compile only parts of your stuff with make. In the config file, there's definitions for "targets" and you can call make with a target name. In your example, there will be a target "bla.o" which depends on "bla.cpp". If you just want to compile bla.cpp and nothing else, you would do "make bla.o". EDIT: int number; number <--- that has type (int) &number <--- that has type (int *) (void *) (&number) <--- force it to pretend that the (int *) is a (void *) | ||
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nunez
Norway4003 Posts
however i belive the diagnostics on clang are more friendly than the the one on gcc, so if he can swap it out without any hassle i think it's a good advice. | ||
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sabas123
Netherlands3122 Posts
the function that will recieve (void*) (*argument) I convert the argument to int with *(int*) but that causes a segment fault:/ | ||
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spinesheath
Germany8679 Posts
On February 28 2015 02:08 nunez wrote: clang might compile faster (it did last time i checked, but gcc seemed to produce faster code), but i doubt sabas would notice the difference. it seems gcc 5 will bring a big boost to compilation speed, which is super nice (i kill compilers). however i belive the diagnostics on clang are more friendly than the the one on gcc, so if he can swap it out without any hassle i think it's a good advice. That's what you get for using a turing complete compile time meta language. | ||
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nunez
Norway4003 Posts
when the main thread is done executing it, this number ceases to be. if the callback runs on the library thread after this, and attempts to dereference a pointer to this number, then you are out of luck. @spinesheath it's hard to despair when your purgatory is a comfortable chair in the proximity of a coffee machine. My desire to inflict pain on the compilers is large. srcThey've been tormenting me for the last 7 years. Now's my chance to strike back! Scott Haney | ||
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sabas123
Netherlands3122 Posts
On February 28 2015 03:12 nunez wrote: the int number is local to the marioRunningRender function, when the main thread is done executing it, this number ceases to be. if the callback runs on the library thread after this, and attempts to dereference a pointer to this number, then you are out of luck. thanks that solved it. | ||
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nunez
Norway4003 Posts
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sabas123
Netherlands3122 Posts
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teamamerica
United States958 Posts
On February 28 2015 01:20 FFGenerations wrote: hi so the next thing i wanna do is take an xml string and parse it into a java object class. there is a class generator here http://pojo.sodhanalibrary.com/ where you paste in sample xml and it designs a class for you however some of my sample xml data uses & instead of & which causes it to be invalid xml apparently. for example the anime + Show Spoiler + <anime href="/encyclopedia/anime.php?id=210">Rurouni Kenshin: Trust & Betrayal (OAV)</anime> my question is, when my system receives the xml string (by requesting from external api), should it first validate it? so it would be like 1) request xml from external API 2) search the string for "<warning>no result for anime=uuu</warning>" and if this is the case then don't try to parse the result into an object (or parse it into a different object...or do something with it different...) 3) search the string for "&" and replace them with "&" 4) (parse into object) (just got out of bed so will look into this myself obv :D ) I think you probably want to look into xml/html decodingfor step 3 (rather than just find and replace). Also there's JAXB stuff for decoding XML but I've never used it before to be honest. Quick question for Java encryption. I'm trying to build some sample code to encrypt a text file. A bit of googling get's me to this StackOverflow answer. They have a few different components - salt, iv, and actual passphrase used to generate key. I'm wondering how important it is to keep all of that data private. I was going to simply hardcode salt into code(choose 8 random bytes), and also store the IV with the encrypted text. In writing this, I suppose I could also store the salt (again in cleartext) with the rest of my text, but I don't know if that helps at all. Here's what I have so far...https://gist.github.com/anonymous/8c225d610297ae9d11e8 I looked into Jasypt and didn't go with it because it's StrongTextEncryptor uses triple-DES and I remember from some old course the key strength of that isn't that high. But honestly I barely know what I'm going, so maybe I should just go with that? Thanks! | ||
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nunez
Norway4003 Posts
not quite sure what you are trying to do, maybe you can post some code. | ||
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Manit0u
Poland17393 Posts
On March 01 2015 05:14 teamamerica wrote: They have a few different components - salt, iv, and actual passphrase used to generate key. I'm wondering how important it is to keep all of that data private. I was going to simply hardcode salt into code(choose 8 random bytes), and also store the IV with the encrypted text. http://security.stackexchange.com/questions/17421/how-to-store-salt The chosen answer is very informational and a good read in itself. Also, it's important to have a unique salt for each encryption, rather than having a single global salt. | ||
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sabas123
Netherlands3122 Posts
class character; std::vector<characater>objectList; class character{ character(); }; character::character(){ addObjectToList(*this); } addObjectToList(character *obj){ objectList.push_back( character *obj); } error:: expecting primal type before '*' sorry about my terrible post, I hope this clears some stuff up. | ||
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