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Is there any performance gain in indexing a boolean field?
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Programmer Puzzle: Encoding a chess board state throughout a game
Not strictly a question, more of a puzzle...
31 Answers
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Formatting Phone Numbers in PHP
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This is a US phone formatter that works on more versions of numbers than any of the current answers.
$numbers = explode("\n", '(111) 222-3333
((111) 222-3333
1112223333
111 222-3333
111-222-3333
(111)2223333
+11234567890
1-8002353551
123-456-7890 -Hello!
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When should I use semicolons in SQL Server?
...can dispense with the statement terminator; in a script, as you're sending more than one statement, you need it.
In practice, always include the terminator even if you're just sending one statement to the database.
Edit: in response to those saying statement terminators are not required by [partic...
What is the “hasClass” function with plain JavaScript?
...replace(/[\n\t]/g, " ").indexOf(" thatClass ") > -1 )
To answer your more general question, you can look at jQuery's source code on github or at the source for hasClass specifically in this source viewer.
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Using openssl to get the certificate from a server
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To make this a bit more concise, you can replace the sed with openssl x509, and read it in using a sub-shell: openssl x509 -in <(openssl s_client -connect server:port -prexit 2>/dev/null)
– Gabe Martin-Dempesy
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JavaScript equivalent to printf/String.Format
...itory of sprintf() for JavaScript was not available. underscore.string has more features aside from sprintf which is based on sprintf() for JavaScript implementation. Other than that the library is an entirely different project.
– Maksymilian Majer
Apr 15 '14 a...
What exactly is Arel in Rails 3.0?
...e?
Yes. For example, as I mentioned above, it is much easier to construct more complex queries from simpler parts.
will it lead to more efficient SQL queries?
Yes. The fact that ARel has a proper object model for the queries means that it can perform optimizations on those queries long before it ...
Change Default Scrolling Behavior of UITableView Section Header
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How to get a function name as a string?
... @RichardGomes functions are first-class objects, there can be more than name bound to them. It is not necessarily the case that f.__name__ == 'f'.
– wim
Mar 13 '14 at 20:13
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