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How expensive is RTTI?

...where I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed. ...
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What is Linux’s native GUI API?

...heir own APIs to handle windows, events and other OS stuff. I have never really got a clear answer as to what Linux’s equivalent is? ...
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recursion versus iteration

...where recursion is used a for loop could be used? And if recursion is usually slower what is the technical reason for ever using it over for loop iteration? ...
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AngularJS - Any way for $http.post to send request parameters instead of JSON?

... return data; } return $.param(data); } }); That way all calls to $http.post will automatically transform the body to the same param format used by the jQuery $.post call. Note you may also want to set the Content-Type header per call or globally like this: $httpProvider.defa...
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jQuery: checking if the value of a field is null (empty)

...ype]').val().length != 0){} If you want to check if the element exist at all, you should do that before calling val: var $d = $('#person_data[document_type]'); if ($d.length != 0) { if ($d.val().length != 0 ) {...} } s...
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git still shows files as modified after adding to .gitignore

...re saying that you need to commit after removing the cached files? That really seems counter-intuitive; these are files I do NOT want to commit. And I do not want them deleted from the repository (I just want them to no longer be hanging around cluttering my git status). Or am I just really confu...
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Given final block not properly padded

...here: http://www.rsa.com/products/bsafe/documentation/cryptoj35html/doc/dev_guide/group_CJ_SYM__PAD.html (I assume you have the issue when you try to encrypt) You can choose your padding schema when you instantiate the Cipher object. Supported values depend on the security provider you are using. ...
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Enabling WiFi on Android Emulator

...s a simulated Wi-Fi access point ("AndroidWifi"), and Android automatically connects to it. More Information: https://developer.android.com/studio/run/emulator.html#wifi share | improve this a...
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Where does 'Hello world' come from?

' hello, world ' is usually the first example for any programming language. I've always wondered where this sentence came from and where was it first used. ...
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Hyphen, underscore, or camelCase as word delimiter in URIs?

...designing an HTTP-based API for an intranet app. I realize it's a pretty small concern in the grand scheme of things, but: should I use hyphens, underscores, or camelCase to delimit words in the URIs? ...