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What does the brk() system call do?
... you don't ask, it might segfault you.
Without brk:
#define _GNU_SOURCE
#include <unistd.h>
int main(void) {
/* Get the first address beyond the end of the heap. */
void *b = sbrk(0);
int *p = (int *)b;
/* May segfault because it is outside of the heap. */
*p = 1;
re...
Do I cast the result of malloc?
...at yourself, which is generally bad.
It can hide an error if you forgot to include <stdlib.h>. This can cause crashes (or, worse, not cause a crash until way later in some totally different part of the code). Consider what happens if pointers and integers are differently sized; then you're hid...
Mercurial .hgignore for Visual Studio 2008 projects
...hgignore file. It covers C#, C++ and Visual Studio development in general, including COM stuff (type libraries), some final builder files, CodeRush, ReSharper, and Visual Studio project upgrades. It also has some ignores for modern (c.2015) web development.
syntax: glob
* - [Cc]opy
* - [Cc]opy/
* ...
Inserting multiple rows in a single SQL query? [duplicate]
...RT statements that use VALUES syntax can insert multiple rows. To do this, include multiple lists of column values, each enclosed within parentheses and separated by commas.
Example:
INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);
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How to calculate moving average without keeping the count and data-total?
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JavaScript Chart Library
...solutions should be better.
For SVG/VML solutions there are many options, including:
Dojox Charting, good if you use the Dojo toolkit already
Raphael-based solutions
Raphael is a very active, well maintained, and mature, open-source graphic library with very good cross-browser support including...
Force R not to use exponential notation (e.g. e+10)?
...ays invoke a print method, and these print methods listen to some options. Including 'scipen' -- a penalty for scientific display. From help(options):
‘scipen’: integer. A penalty to be applied when deciding to print
numeric values in fixed or exponential notation. Positive
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How to specify new GCC path for CMake
My OS is centos which has a default gcc in path /usr/bin/gcc . But it is old, I need a new version of gcc. So I install a new version in a new path /usr/local/bin/gcc .
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Java String to SHA1
...rdova Concerning the console invocation: If you use echo test, the output including a line break will be piped to sha1sum. If you want to hash a plain string without trailing line break, you can use echo -n test | sha1sum. The -n parameter makes echo omitting the line break.
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