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C++ Best way to get integer division and remainder
...imize, though, at least for g++. A simple experiment with g++ 6.3.0 on x86_64 revealed that with no optimization at all, you get two idivl instructions, but with -O1 or greater, you get one. As the manual says, “Without any optimization option … Statements are independent”.
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Linq to EntityFramework DateTime
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Bo Persson
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answered Oct 18 '11 at 20:16
andrewandrew...
Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...'s an example using typical settings for an x86 processor (all used 32 and 64 bit modes):
struct X
{
short s; /* 2 bytes */
/* 2 padding bytes */
int i; /* 4 bytes */
char c; /* 1 byte */
/* 3 padding bytes */
};
struct Y
{
int i; /* 4 bytes */
ch...
What's the meaning of exception code “EXC_I386_GPFLT”?
...lem is without more context, there are 27 different causes listed in my AMD64 Programmer's Manual, Vol 2 from 2005 - by all accounts, it is likely that 8 years later would have added a few more.
If it is a 64-bit system, a plausible scenario is that your code is using a "non-canonical pointer" - m...
maximum value of int
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in C99 you can also use UINT64_MAX and INT64_MAX
– Dmitry Vyal
Oct 2 '13 at 9:08
3
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Accidentally committed .idea directory files into git
...deckTadeck
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4
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JavaScript/jQuery to download file via POST with JSON data
...as used here with PDFs: alexhadik.com/blog/2016/7/7/l8ztp8kr5lbctf5qns4l8t3646npqh
– Mateo Tibaquira
Jun 17 '17 at 10:34
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What is the size of an enum in C?
I'm creating a set of enum values, but I need each enum value to be 64 bits wide. If I recall correctly, an enum is generally the same size as an int; but I thought I read somewhere that (at least in GCC) the compiler can make the enum any width they need to be to hold their values. So, is it possib...
Is there a Unix utility to prepend timestamps to stdin?
...row this out there: there are a pair of utilities in daemontools called tai64n and tai64nlocal that are made for prepending timestamps to log messages.
Example:
cat file | tai64n | tai64nlocal
HMAC-SHA1 in bash
...] echo -n "value" | openssl dgst -sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Or simply:
[me@home] echo -n "value" | openssl sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Remember to use -n with echo or else a line break character is appended to the string and that cha...