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Is #pragma once part of the C++11 standard?

...e standard and portable way to avoid multiple header inclusions in C++ was/is to use the #ifndef - #define - #endif pre-compiler directives scheme also called macro-guard scheme (see code snippet below). ...
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Moment.js transform to date object

... Use this to transform a moment object into a date object: From http://momentjs.com/docs/#/displaying/as-javascript-date/ moment().toDate(); Yields: Tue Nov 04 2014 14:04:01 GMT-0600 (CST) ...
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Get to UIViewController from UIView?

Is there a built-in way to get from a UIView to its UIViewController ? I know you can get from UIViewController to its UIView via [self view] but I was wondering if there is a reverse reference? ...
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How do I get a Date without time in Java?

...o such concept as "just a date", Joda Time does have a type representing this (LocalDate). Your code will be much clearer if you're able to use types which represent what you're actually trying to do. There are many, many other reasons to use Joda Time or java.time instead of the built-in java.util...
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Make xargs execute the command once for each line of input

...e command exactly once for each line of input given? It's default behavior is to chunk the lines and execute the command once, passing multiple lines to each instance. ...
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python: How do I know what type of exception occurred?

... catch generic exceptions, but no one seems to want to tell you why, which is essential to understanding when you can break the "rule". Here is an explanation. Basically, it's so that you don't hide: the fact that an error occurred the specifics of the error that occurred (error hiding antipatter...
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Bash Script : what does #!/bin/bash mean? [duplicate]

... That is called a shebang, it tells the shell what program to interpret the script with, when executed. In your example, the script is to be interpreted and run by the bash shell. Some other example shebangs are: (From Wikipedia...
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What's the recommended way to extend AngularJS controllers?

... Perhaps you don't extend a controller but it is possible to extend a controller or make a single controller a mixin of multiple controllers. module.controller('CtrlImplAdvanced', ['$scope', '$controller', function ($scope, $controller) { // Initialize the super cla...
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What is the difference between and ?

What is the difference between <html lang="en"> and <html lang="en-US"> ? What other values can follow the dash? ...
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How to check if AlarmManager already has an alarm set?

When my app starts, I want it to check if a particular alarm (registered via AlarmManager) is already set and running. Results from google seem to indicate that there is no way to do this. Is this still correct? I need to do this check in order to advise the user before any action is taken to create...