2014/1/14-2/5 [Computer/SW/Languages/C_Cplusplus] UID:54763 Activity:nil | 1/14 Why is NULL defined to be "0" in C++ instead of "((void *) 0)" like in
C? I have some overloaded functtions where one takes an integer
parameter and the other a pointer parameter. When I call it with
"NULL", the compiler matches it with the integer version instead of
the pointer version which is a problem. Other funny effect is that
sizeof(NULL) is different from sizeof(myPtr). Thanks.
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2013/4/29-5/18 [Computer/SW/Languages/C_Cplusplus, Computer/SW/Compilers] UID:54665 Activity:nil | 4/29 Why were C and Java designed to require "break;" statements for a
"case" section to terminate rather than falling-through to the next
section? 99% of the time poeple want a "case" section to terminate.
In fact some compilers issue warning if there is no "break;" statement
in a "case" section. Why not just design the languages to have
termination as the default behavior, and provide a "fallthru;"
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2012/7/19-11/7 [Computer/SW/Languages/C_Cplusplus] UID:54439 Activity:nil | 7/19 In C or C++, how do I write the code of a function with variable
number of parameters in order to pass the variable parameters to
another function that also has variable number of parameters? Thanks.
\_ The usual way (works on gcc 3.0+, Visual Studio 2005+):
#define foo(fmt, ...) printf(fmt, ##__VA_ARGS__)
The cool new way (works on gcc 4.3+):
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2011/3/7-4/20 [Computer/SW/Languages/C_Cplusplus] UID:54056 Activity:nil | 3/7 I have a C question. I have the following source code in two identical
files t.c and t.cpp:
#include <stdlib.h>
int main(int argc, char *argv[]) {
const char * const * p1;
const char * * p2;
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2011/2/5-19 [Computer/SW/Languages/C_Cplusplus] UID:54027 Activity:nil | 2/4 random C programming/linker fu question. If I have
int main() { printf("%s is at this adddr %p\n", "strlen", strlen); }
and soda's /proc/sys/kernel/randomize_va_space is 2 (eg; on)
why is strlen (or any other libc fn) at the same address every time?
\_ I don't pretend to actually know the right answer to this, but
could it have something to do with shared libraries?
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2010/2/12-3/9 [Computer/SW/Languages/C_Cplusplus] UID:53708 Activity:nil | 2/12 I need a way to make a really big C++ executable (~200MBs) that does
nothing. No static initialization either. Any ideas?
\_ static link in lots of libraries?
\_ #define a i=0; i=0; i=0; i=0; i=0; i=0; i=0; i=0; i=0; i=0;
#define b a a a a a a a a a a
#define c b b b b b b b b b b
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2009/8/7-14 [Computer/SW/Languages/C_Cplusplus, Computer/SW/Languages/Java] UID:53252 Activity:high | 8/6 In C one can do "typedef int my_index_t;". What's the equivalent in
C#? Thanks.
\_ C#? Are you serious? Is this what the class of 2009 learn?
\_ No. I have to learn .NET code at work. I am Class of '93.
\_ python is what 2009 learns, see the motd thread about recent
cal courses and languages
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2009/7/21-24 [Computer/SW/Languages/Java] UID:53168 Activity:moderate | 7/20 For those who care btw, it looks like eclipse is now A Standard Tool
at UCB ugrad cs, probably replaced emacs. Furthermore, people get
angry at seeing Makefiles, (since eclispe takes care of that). I
guess it's just a sign of the times.
\_ The more people at my work use eclipse the less the code is
managable in emacs. I'm not sure which application's fault
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2011/9/14-10/25 [Computer/HW/Drives] UID:54173 Activity:nil | 9/13 Thanks to Jordan, our disk server is no longer virtualized. Our long
nightmare of poor IO performance should hopefully be over. Prepare for
another long nightmare of poor hardware reliability!
...
Just kidding! (I hope)
In any case, this means that cooler was taken out back and shot, and
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2010/6/8-30 [Computer/Companies/Yahoo] UID:53853 Activity:nil | 6/8 Newly wed husband and wife found from old picture that they have
actually crossed path 30yrs ago: http://www.csua.org/u/qwv
My question is how do stories like this find its way to news media? Do
people just go "hey something very interesting happens in our lives.
Let's call up a news agency or two to tell the world about it."?
\_ "Your video will begin after a word from our sponsors."
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2010/4/28-5/10 [Computer/SW/OS/Windows] UID:53807 Activity:nil | 4/28 Win 3.1 was more widely adopted than Win 3.0. Win XP (5.1) was more
widely adopted than Win 2k (5.0). Now it looks like Win 7 (6.1) is
going to be more widely adopted than Vista (6.0). Is this a trend on
Microsoft x.0 versions being bad?
\_ duh.
\_ "more widely adopted" ... well... what are you basing these numbers
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2010/3/8-30 [Computer/SW/Unix] UID:53745 Activity:nil | 3/8 I have a mod_rewrite question that I think should be straight-
forward but I think I'm not getting something.
I have a virtual server with some root, say /home/user/public_html/
and in there I have two subdirs, say /app1/ and /app2/
and i want the following:
http://mysite/app1 --> /home/user/public_html/app1
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2010/1/22-24 [Computer/SW/Unix] UID:53654 Activity:high | 1/22 What's the difference between a job and a career?
\_ women have jobs, men have careers.
\_ true statement but one that is sexist and should be
kept in a private conversation
\_ A job could be anything that pays mortgage or feed the mouth.
A career is something that is longer term, most of the time,
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2009/8/18-9/1 [Computer/SW/Unix] UID:53284 Activity:nil | 8/18 Is it possible to truncate your path name in your prompt in tcsh?
Tsch veterans REPRESENT! I know this is how to do it in bash:
# truncate path: returns $1 truncated to $2 chars, prefixed with ...
truncate_path () {
if [ -z "$1" -o -z "$2" ]
then
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2009/8/19-9/1 [Computer/SW/Unix] UID:53285 Activity:nil | 8/18 Hi again, new freebsd guy here again, in bash I was able to go
LD_LIBRARY_PATH=/opt/foo/lib ./runmyapp
I managed to do this in tcsh by using setenv in a shell script
that setenv's the lib path and then executes $1, just wondering
if there was a way to do it in 1 line from the cmd line as in bash?
Thanks, btw %2c or %3c worked. Freebsd, tcsh and vi forever!
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2009/2/26-3/5 [Computer/SW/Unix] UID:52653 Activity:nil | 2/26 If I want to rsync a perforce or svn directory while users
are checking things in, could I wind up with a corrupted copy?
\_ sure why not. if you are really cool, your copy of the svn
repo is on LVM, and you snap the LVM to copy it.
\_ It'll seem less cool when you realize you've taken a snapshot
of a block level device, which only guarantees that this set of
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