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What new capabilities do user-defined literals add to C++?

...ctor call: #include <bitset> #include <iostream> template<char... Bits> struct checkbits { static const bool valid = false; }; template<char High, char... Bits> struct checkbits<High, Bits...> { static const bool valid = (High == '0' || High == '1')...
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How to convert wstring into string?

...= L"ħëłlö"; const std::locale locale(""); typedef std::codecvt<wchar_t, char, std::mbstate_t> converter_type; const converter_type& converter = std::use_facet<converter_type>(locale); std::vector<char> to(ws.length() * converter.max_length()); std::mbstate_t state...
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Insert spaces between words on a camel-cased token [duplicate]

...e Stuff And Sell It (IIRC). Syntax explanation (credit): {Ll} is Unicode Character Category "Letter lowercase" (as opposed to {Lu} "Letter uppercase"). P is a negative match, while p is a positive match, so \P{Ll} is literally "Not lowercase" and p{Ll} is "Lowercase". So this regex splits on two p...
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How do I add a newline to a TextView in Android?

... my own resulting in the following solution for rendering line feed escape chars: string = string.replace("\\\n", System.getProperty("line.separator")); Using the replace method you need to filter escaped linefeeds (e.g. '\\\n') Only then each instance of line feed '\n' escape chars gets rendere...
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Reading a plain text file in Java

...formance always call sb.append('\n') in preference to sb.append("\n") as a char is appended to the StringBuilder faster than a String – gb96 Jul 5 '13 at 0:58 2 ...
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What is the point of Lookup?

...in those assemblies IEnumerable<Type> allTypes = sampleTypes.Select(t => t.Assembly) .SelectMany(a => a.GetTypes()); // Grouped by namespace, but indexable ILookup<string, Type> lookup = allTypes.ToLookup(t =&g...
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Resize fields in Django Admin

... some cases, is a real waste of space, when, i.e., editing a date field, 8 characters wide, or a CharField, also 6 or 8 chars wide, and then the edit box goes up to 15 or 20 chars. ...
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How do you echo a 4-digit Unicode character in Bash?

... the magic incantation to make echo spit it, or any other, 4-digit Unicode character. Two-digit one's are easy. For example, echo -e "\x55", . ...
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Characters allowed in a URL

Does anyone know the full list of characters that can be used within a GET without being encoded? At the moment I am using A-Z a-z and 0-9... but I am looking to find out the full list. ...
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Hiding user input on terminal in Linux script

... ss64.com/bash/read.html Silent mode. If input is coming from a terminal, characters are not echoed. – Andreas Wong Oct 7 '15 at 3:45 ...