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What is the difference between char s[] and char *s?
...modify the contents of the array, the behavior is undefined.
GCC 4.8 x86-64 ELF implementation
Program:
#include <stdio.h>
int main(void) {
char *s = "abc";
printf("%s\n", s);
return 0;
}
Compile and decompile:
gcc -ggdb -std=c99 -c main.c
objdump -Sr main.o
Output contai...
Generate random numbers following a normal distribution in C/C++
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Here's a C++ example, based on some of the references. This is quick and dirty, you are better off not re-inventing and using the boost library.
#include "math.h" // for RAND, and rand
double sampleNormal() {
double u = ((double) rand() / (RA...
How do I convert an interval into a number of hours with postgres?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Position of least significant bit that is set
...significant bit is position 1 and the most significant position e.g. 32 or 64. The functions ffsll() and ffsl() do the same but take arguments of possibly different size.
Return Value
These functions return the position of the first bit set, or 0 if no bits are set in i.
Conforming to
4.3BSD, POSIX....
Running a cron job at 2:30 AM everyday
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Why can I type alias functions and use them without casting?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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List of all index & index columns in SQL Server DB
...ers, and the XML type
-- add select where indid<255 and si.status&64=0 (to omit the text/image index and autostats)
If your names include spaces, add square brackets around them in the creation scripts.
When the last Key column is all nulls, you know that none are missing.
Filtering out...
github: No supported authentication methods available
...ame. Apparently when using Github (or is it a Git thing?), if you use key-based authentication, you need to set your username to git.
I'm not sure why you even need a username at all - perhaps someone more knowledgeable can explain that?
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Javascript: How to detect if browser window is scrolled to bottom?
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Note for mac
Based on @Raphaël's comment, there was a problem in mac due to a small offset.
The following updated condition works:
(window.innerHeight + window.pageYOffset) >= document.body.offsetHeight - 2
I didn't have the chance ...
HTTP headers in Websockets client API
... above results in the following header with the string "username:password" base64 encoded:
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=
I have tested basic auth in Chrome 55 and Firefox 50 and verified that the basic auth info is indeed negotiated with the server (this may not work in Safari).
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