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How to search for occurrences of more than one space between words in a line
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183
[ ]{2,}
SPACE (2 or more)
You could also check that before and after those spaces words f...
How to determine whether a Pandas Column contains a particular value
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199
in of a Series checks whether the value is in the index:
In [11]: s = pd.Series(list('abc'))
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Is there any performance gain in indexing a boolean field?
I'm just about to write a query that includes a WHERE isok=1 . As the name implies, isok is a boolean field (actually a TINYINT(1) UNSIGNED that is set to 0 or 1 as needed).
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Anonymous recursive PHP functions
...rence
$factorial = function( $n ) use ( &$factorial ) {
if( $n == 1 ) return 1;
return $factorial( $n - 1 ) * $n;
};
print $factorial( 5 );
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Can't stop rails server
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You can use other ports like the following:
rails server -p 3001
Normally in your terminal you can try Ctrl + C to shutdown the server.
The other way to kill the Ruby on Rails default server (which is WEBrick) is:
kill -INT $(cat tmp/pids/server.pid)
In your terminal to find out th...
What does the tilde before a function name mean in C#?
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216
~ is the destructor
Destructors are invoked automatically, and cannot be invoked explicitly.
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How to make div background color transparent in CSS
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141
Opacity gives you translucency or transparency. See an example Fiddle here.
-ms-filter: "prog...
Initializing a member array in constructor initializer
...rectly to fire off list initialization
struct A {
int foo[3];
A():foo{1, 2, 3} { }
A():foo({1, 2, 3}) { } /* invalid */
};
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What is the Objective-C equivalent for “toString()”, for use with NSLog?
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edited Aug 27 '12 at 19:01
answered Jul 9 '09 at 15:49
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How to replace a character with a newline in Emacs?
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edited Apr 9 '14 at 9:48
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