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How to allocate aligned memory only using the standard library?
... allocate a space in which 1024 bytes of data can be stored, and where the base address is a multiple of 16 bytes". If the interviewer really meant how can you allocate 1024 bytes (only) and have it 16-byte aligned, then the options are more limited.
Clearly, one possibility is to allocate 1024 b...
Groovy / grails how to determine a data type?
...
instanceof is great for filtering based on interface.
– cdeszaq
Mar 12 '13 at 13:15
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How can I recall the argument of the previous bash command?
...
!!:n where n is the 0-based position of the argument you want.
For example:
echo 'one' 'two'
# "one two"
echo !!:2
# "two"
The ! prefix is used to access previous commands.
Other useful commands:
!$ - last argument from previous command
!^...
Detecting endianness programmatically in a C++ program
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I don't like the method based on type punning - it will often be warned against by compiler. That's exactly what unions are for !
bool is_big_endian(void)
{
union {
uint32_t i;
char c[4];
} bint = {0x01020304};
return b...
Creating email templates with Django
...r example, you would register your email :
from simple_mail.mailer import BaseSimpleMail, simple_mailer
class WelcomeMail(BaseSimpleMail):
email_key = 'welcome'
def set_context(self, user_id, welcome_link):
user = User.objects.get(id=user_id)
return {
'user': ...
Is there a way to make mv create the directory to be moved to if it doesn't exist?
...
[ -a "$dir" ] ||
mkdir -p "$dir" &&
mv "$@"
}
These based on the submission of Chris Lutz.
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Is it better to use std::memcpy() or std::copy() in terms to performance?
...of std::copy over memcpy: 2.99%
My compiler is gcc 4.6.3 on Fedora 16 x86_64. My optimization flags are -Ofast -march=native -funsafe-loop-optimizations.
Code for my SHA-2 implementations.
I decided to run a test on my MD5 implementation as well. The results were much less stable, so I decided to...
(-2147483648> 0) returns true in C++?
... exponent part. An integer literal may have a prefix that specifies its
base and a suffix that specifies its type.
…
The type of an integer literal is the first of the corresponding list
in which its value can be represented.
If an integer literal cannot be represented by any t...
Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
...ntelliJ 13 after upgrading from 12.
What worked for me was editing the idea64.vmoptions in the bin folder and setting the max heap to 8 GB (was 512 MB) and the Max PermGen to at least 1GB (was 300MB).Example below:
-Xms128m
-Xmx8192m
-XX:MaxPermSize=1024m
Upon restart it was much faster.
For Int...
Get path of executable
...lt;boost/tokenizer.hpp>
#if (BOOST_VERSION > BOOST_VERSION_NUMBER(1,64,0))
# include <boost/process.hpp>
#endif
#if (BOOST_OS_CYGWIN || BOOST_OS_WINDOWS)
# include <Windows.h>
#endif
#include <boost/executable_path.hpp>
#include <boost/detail/executable_path_internals...