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SQL Add foreign key to existing column
... 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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What are the Dangers of Method Swizzling in Objective-C?
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Apple is not the only provider of base classes that can be modified via siwzzling. Your answer ought to be edited to include everyone.
– A.R.
Mar 17 '11 at 13:56
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Which is more efficient, a for-each loop, or an iterator?
...the RandomAccess interface. The "C-style" loop is faster than the Iterator-based one. docs.oracle.com/javase/7/docs/api/java/util/RandomAccess.html
– andresp
Nov 20 '13 at 1:00
5
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Passing a std::array of unknown size to a function
...known width...
// I guess I could make it follow pointer semantics and rebase? Dunno
// this being tricky, I am tempted to =delete operator=
template<typename T, std::size_t N>
contig_range( std::array<T, N>& arr ): _begin(&*std::begin(arr)), _end(&*std::end(arr)) {...
Can (domain name) subdomains have an underscore “_” in it?
...about your factual statements, except pointing out that answers are false, based on how the question is currently worded.
– redreinard
Apr 11 '14 at 2:36
4
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Find (and kill) process locking port 3000 on Mac
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64
Sometimes lsof -i :port will show nothing. try sudo lsof -i :port.
– kilik52
Jan 30 '14 at 12:05
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Why {} + {} is NaN only on the client side? Why not in Node.js?
...ed it and found it helpful, but I owe it to my familiarity with these code bases (dev-tools and nodejs) rather than my intellect. Going straight to the source is often always the easiest.
– Benjamin Gruenbaum
Jun 28 '13 at 22:08
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What is Autoloading; How do you use spl_autoload, __autoload and spl_autoload_register?
...er('MyAutoloader::HelperLoader');
spl_autoload_register('MyAutoloader::DatabaseLoader');
class MyAutoloader
{
public static function ClassLoader($className)
{
//your loading logic here
}
public static function LibraryLoader($className)
{
//your loading logic ...
Subprocess changing directory
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Another option based on this answer: https://stackoverflow.com/a/29269316/451710
This allows you to execute multiple commands (e.g cd) in the same process.
import subprocess
commands = '''
pwd
cd some-directory
pwd
cd another-directory
p...
Windows shell command to get the full path to the current directory?
...as follows:
SET var=%cd%
ECHO %var%
sample screenshot from a Windows 7 x64 cmd.exe.
Update: if you do a SET var = %cd% instead of SET var=%cd% , below is what happens. Thanks to jeb.
Capturing the current directory from a batch file
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