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Multi-Line Comments in Ruby?
.....is kinda ugly and creates
a String instance, but I know one guy
with a Smalltalk background, who
does this."
puts "Hello world!"
##
# most
# people
# do
# this
__END__
But all forgot there is another option.
Only at the end of a file, of course.
This is how it looks (via screenshot) - othe...
List all sequences in a Postgres db 8.1 with SQL
...
The following query gives names of all sequences.
SELECT c.relname FROM pg_class c WHERE c.relkind = 'S';
Typically a sequence is named as ${table}_id_seq. Simple regex pattern matching will give you the table name.
To get last value of a sequence use the ...
Can I have an IF block in DOS batch file?
...t, and the opening parenthesis.
I am setting @echo off to keep from seeing all of the statements printed to the console as they execute, and instead just see the output of those that specifically begin with echo.
I'm using the built-in ERRORLEVEL variable just as a test. Read more here
...
How to manually expand a special variable (ex: ~ tilde) in bash
...
Using eval is a horrible suggestion, it's really bad that it gets so many upvotes. You will run into all sorts of problems when the variable's value contains shell meta characters.
– user2719058
Aug 31 '14 at 19:47
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How do I terminate a thread in C++11?
...
You could call std::terminate() from any thread and the thread you're referring to will forcefully end.
You could arrange for ~thread() to be executed on the object of the target thread, without a intervening join() nor detach() on that...
How to create a directory if it doesn't exist using Node.js?
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using *Sync methods is usually a no-no: don't want to block the event loop
– Max Heiber
Feb 13 '17 at 21:23
16
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How do I use extern to share variables between source files?
...ler is informed that a
variable exists (and this is its type); it does not allocate the
storage for the variable at that point.
A variable is defined when the compiler allocates the storage for
the variable.
You may declare a variable multiple times (though once is sufficient);
you may only defin...
What is NSLayoutConstraint “UIView-Encapsulated-Layout-Height” and how should I go about forcing it
...eels like an Apple bug, I think it's probably the right thing to do. Especially in light of the fact that Apple recalculate this constraint and everything does lay out correctly after the error prints.
– Rog
Mar 18 '15 at 12:15
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Regex not operator
...: lookahead) this doesn't (hence: negative) match this. But it doesn't actually consume the characters it matches (hence: zero-width).
There are actually 4 combinations of lookarounds with 2 axes:
lookbehind / lookahead : specifies if the characters before or after the point are considered
positi...
How do I keep Python print from adding newlines or spaces? [duplicate]
...ys.stdout.flush()
sys.stdout.write('m')
sys.stdout.flush()
You need to call sys.stdout.flush() because otherwise it will hold the text in a buffer and you won't see it.
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