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What is the mouse down selector in CSS?

...d link */ a:visited {color:#00FF00;} /* visited link */ See also: http://www.w3.org/TR/selectors/#the-user-action-pseudo-classes-hover-act share | improve this answer | fol...
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Are HTTP headers case-sensitive?

...nyms. For example - would it be "Front-End-Https" or "Front-End-HTTPS" - "WWW-Authenticate" or "Www-Authenticate" - specifying all lowercase removes ambiguity by standardising the field. This in turn simplifies handling the headers all round. – Fraser Apr 10 '...
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What's the point of the X-Requested-With header?

...slide recipes into a container based on a link they click. The link may be www.example.com/recipe/apple_pie Now normally that returns a full page, header, footer, recipe content and ads. But if someone is browsing your website some of those parts are already loaded. So you can use an AJAX to get th...
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What is Express.js?

...he stack. Alternatives Other Node.js frameworks to consider (https://www.quora.com/Node-js/Which-Node-js-framework-is-best-for-building-a-RESTful-API): UPDATE: I put together this resource that aid people in choosing Node.js frameworks: http://nodeframework.com UPDATE2: We added some GitHub ...
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What's a good IDE for Python on Mac OS X? [closed]

... My 2 pennies, check out PyCharm http://www.jetbrains.com/pycharm/ (also multi-platform) share | improve this answer | follow ...
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Why does !{}[true] evaluate to true in JavaScript?

...true, but undefined, and undefined is evaluated as false: http://jsfiddle.net/67GEu/ 'use strict'; var b = {}[true]; alert(b); // undefined b = !{}[true]; alert(b); // true share | improve this a...
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What is a raw type and why shouldn't we use it?

...LS, on why this sort of behavior ought to occur: https://bugs.openjdk.java.net/browse/JDK-6400189. (In short, it makes the specification simpler.) If it's unsafe, why is it allowed to use a raw type? Here's another quote from JLS 4.8: The use of raw types is allowed only as a concession to compati...
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HTTP authentication logout via PHP

...gic to PHP by sending the appropriate headers (if not logged in): Header('WWW-Authenticate: Basic realm="protected area"'); Header('HTTP/1.0 401 Unauthorized'); And parsing the input with: $_SERVER['PHP_AUTH_USER'] // httpauth-user $_SERVER['PHP_AUTH_PW'] // httpauth-password So disabling hi...
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Should one use < or

... @Chris, Your statement about .Length being costly in .NET is actually untrue and in the case of simple types the exact opposite. int len = somearray.Length; for(i = 0; i &lt; len; i++) { somearray[i].something(); } is actually slower than for(i = 0; i &lt; somearray.Length...
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Are inline virtual functions really a non-sense?

...ons in following two cases: Curiously recurring template pattern (http://www.codeproject.com/Tips/537606/Cplusplus-Prefer-Curiously-Recurring-Template-Patt) Replacing virtual methods with templates (http://www.di.unipi.it/~nids/docs/templates_vs_inheritance.html) ...