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How to properly check if std::function is empty in C++11?
...'re not checking for an empty lambda, but whether the std::function has a callable target stored in it. The check is well-defined and works because of std::function::operator bool which allows for implicit conversion to bool in contexts where boolean values are required (such as the conditional expr...
Debug a java application without starting the JVM with debug arguments
Normally to attach a debuger to a running jvm you would need start the jvm with arguments such as the following:
5 Answers
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How to skip to next iteration in jQuery.each() util?
...t only current iteration it's enough just to return 'return'. And to exit all iterations forward return false.
– Saulius
Aug 23 '15 at 8:53
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Differences between Html.TextboxFor and Html.EditorFor in MVC and Razor
... custom editor template (~/Views/Shared/EditorTemplates/string.cshtml) and all your textboxes in your application will automatically benefit from this change whereas if you have hardcoded Html.TextBoxFor you will have to modify it everywhere. You could also use Data Annotations to control the way th...
Hidden Features of C++? [closed]
...refore, with http://stackoverflow.com, http is a label (you could theoretically write goto http;), and //stackoverflow.com is just an end-of-line comment. Both of these are legal C++, so the construct compiles. It doesn't do anything vaguely useful, of course.
– David Thornle...
See “real” commit date in github (hour/day)
...a <time> element with an iso value under its datetime attribute.
If all else fails, like it did for me, try inspecting the text.
Sample element:
<time datetime="2015-01-22T20:48:13Z" is="relative-time" title="Jan 22, 2015, 2:48 PM CST">7 days ago</time>
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How does Go compile so quickly?
... whole VM, then they have to be JIT-compiled from bytecode to native code, all of which takes some time.
Speed of compilation depends on several factors.
Some languages are designed to be compiled fast. For example, Pascal was designed to be compiled using a single-pass compiler.
Compilers itself...
How do I get out of a screen without typing 'exit'?
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yes, you generally do have a tl;dr moment with the man command. so when you have a tl;dr when doing man command_name, in this case man screen, you can generally access a shorter & pretty helpful version of the docs by --help option, ...
How to replace a set of tokens in a Java String?
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The most efficient way would be using a matcher to continually find the expressions and replace them, then append the text to a string builder:
Pattern pattern = Pattern.compile("\\[(.+?)\\]");
Matcher matcher = pattern.matcher(text);
HashMap<String,String> replacements = new...
Binding multiple events to a listener (without JQuery)?
...r for two different events on the same element. You could write your own small function to do the job, e.g.:
/* Add one or more listeners to an element
** @param {DOMElement} element - DOM element to add listeners to
** @param {string} eventNames - space separated list of event names, e.g. 'click c...