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Does a foreign key automatically create an index?
...hip, you'll often need to lookup a relating table and extract certain rows based on a single value or a range of values.
So it makes good sense to index any columns involved in a FK, but a FK per se is not an index.
Check out Kimberly Tripp's excellent article "When did SQL Server stop putting ind...
How to run Ruby code from terminal?
... 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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HEAD and ORIG_HEAD in Git
... name to operate on --- resetting and growing the branch tip via commit/rebase/etc.).
Reflog is a vehicle to go back in time and time machines have interesting interaction with the notion of "current".
HEAD@{5.minutes.ago} could mean "dereference HEAD symref to find out what branch we are...
Expression Versus Statement
...mited lambdas, like Python's single-expression lambdas.
In an expression-based language, all you need is a single expression for a function since all control structures return a value (a lot of them return NIL). There's no need for a return statement since the last-evaluated expression in the func...
XML parsing of a variable string in JavaScript
...answer see Tim Down's answer.
Internet Explorer and, for example, Mozilla-based browsers expose different objects for XML parsing, so it's wise to use a JavaScript framework like jQuery to handle the cross-browsers differences.
A really basic example is:
var xml = "<music><album>Beeth...
Same-named attributes in attrs.xml for custom view
..."?>
<resources>
<!-- common attributes to all custom text based views -->
<declare-styleable name="TextAttributes">
<attr name="text" format="string"/>
<attr name="textSize" format="dimension"/>
<attr name="textColor" format="colo...
MySQL: Order by field size/length
... 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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Why should the copy constructor accept its parameter by reference in C++?
... Another good reason, noted by my compiler, is if you have a base class with pure virtual functions the intialization of this variable by value would not be possible
– user451498
May 14 '12 at 23:52
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jQuery - Add ID instead of Class
... 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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How to remove the arrows from input[type=“number”] in Opera [duplicate]
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Because not everyone uses a WebKit-based browser: stackoverflow.com/questions/23372903/…
– Michael Cordingley
Jul 20 '15 at 19:19
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