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What is the optimal length for an email address in a database?
...er", and the domain part is "example.com".
The local part must not exceed 64 characters and the domain part cannot be longer than 255 characters.
The combined length of the local + @ + domain parts of an email address must not exceed 254 characters. As described in RFC3696 Errata ID 1690.
I got t...
Realistic usage of the C99 'restrict' keyword?
... *b
add R2 += R1
set R2 → *b
Does GCC really do it?
GCC 4.8 Linux x86-64:
gcc -g -std=c99 -O0 -c main.c
objdump -S main.o
With -O0, they are the same.
With -O3:
void f(int *a, int *b, int *x) {
*a += *x;
0: 8b 02 mov (%rdx),%eax
2: 01 07 add ...
unable to copy/paste in mingw shell
...
[Alternative] For MINGW64 (mintty 2.7.9) terminal in Windows 10, you can enable "Ctrl+Shift+letter shortcuts" to perform copy with (Ctrl+Shift+c) and paste with (Ctrl+Shift+v).
To enable the feature:
right-click command window
Click on 'Keys'
C...
Open file dialog and select a file using WPF controls and C#
...proketboy I must confess complete confusion as to what you mean by a "pure 64bit desktop application"; could you explain further? My understanding is the Microsoft.Win32 libraries are a managed API to the underlying OS; how they talk to the OS should be of no concern to the rest of my (x64 64bit) ap...
Best implementation for hashCode method for a collection
...sult = 31 * result + (int)(longField ^ (longField >>> 32)); // 64 bits » 32-bit
result = 31 * result + Float.floatToIntBits(floatField); // 32 bits » 32-bit
long doubleFieldBits = Double.doubleToLongBits(doubleField); // 64 bits (double) » 64-bit (long) » 32-bit...
Python matplotlib multiple bars
...
Diptangsu Goswami
3,64822 gold badges1818 silver badges2929 bronze badges
answered Jan 11 '13 at 2:12
HYRYHYRY
...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...ke this:
$ env -i perl -V
...
@INC:
/usr/lib/perl5/site_perl/5.18.0/x86_64-linux-thread-multi-ld
/usr/lib/perl5/site_perl/5.18.0
/usr/lib/perl5/5.18.0/x86_64-linux-thread-multi-ld
/usr/lib/perl5/5.18.0
.
Note . at the end; this is the current directory (which is not necessarily the same a...
Environment variables for java installation
...
Java SE Development Kit 8u112 on a 64-bit Windows 7 or Windows 8
Set the following user environment variables (== environment variables of type user variables)
JAVA_HOME : C:\Program Files\Java\jdk1.8.0_112
JDK_HOME : %JAVA_HOME%
JRE_HOME : %JAVA_HOME%\jr...
When do I use the PHP constant “PHP_EOL”?
...uses "\n". Someone should file a bug report...
– imgx64
Jan 28 '12 at 7:32
28
@imgx64 Yeah maybe,...
Fastest sort of fixed length 6 int array
...tainly the best answer. I will check if it also is (and how much) in golf x64 context and publish result.
– kriss
May 7 '10 at 12:06
1
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