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How to create a subdirectory for a project QtCreator?
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Can I do this nesting from the IDE or do I have to manually set those files and dirs?
– gruszczy
Jul 24 '09 at 12:19
1
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How do I step out of a loop with Ruby Pry?
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To exit Pry unconditionally, type
exit-program
Edit from @Nick's comment: Also works:
!!!
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JavaScript click event listener on class
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If you have ES6 support you can replace your last line with:
Array.from(elements).forEach(function(element) {
element.addEventListener('click', myFunction);
});
Note: Older browsers (like IE6, IE7, IE8) don´t support getElementsByClassName and so they return undefined.
EDIT :...
How do you run a single test/spec file in RSpec?
... want to execute your specs using Rake in order to ensure you are starting from a blank database.
– superluminary
Oct 2 '13 at 11:54
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Java serialization: readObject() vs. readResolve()
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readResolve is used for replacing the object read from the stream. The only use I've ever seen for this is enforcing singletons; when an object is read, replace it with the singleton instance. This ensures that nobody can create another instance by serializing and deserializ...
What's the use of ob_start() in php?
...o I can break out of PHP with a lot of HTML but not render it. It saves me from storing it as a string which disables IDE color-coding.
<?php
ob_start();
?>
<div>
<span>text</span>
<a href="#">link</a>
</div>
<?php
$content = ob_get_clean();
?>...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...osite key depends on all of its elements, it is impossible to calculate it from partial information.
Advanced features of Boost.MultiIndex key extractors
The Key Extractor concept allows the same object to extract keys from several different types, possibly through suitably defined overloads of op...
Check if Internet Connection Exists with Javascript? [duplicate]
...ervices you are trying to connect to.
To determine if a host is reachable from your network, you could do this:
function hostReachable() {
// Handle IE and more capable browsers
var xhr = new ( window.ActiveXObject || XMLHttpRequest )( "Microsoft.XMLHTTP" );
// Open new request as a HEAD t...
General guidelines to avoid memory leaks in C++ [closed]
...the most basic pattern to know is RAII.
Learn to use smart pointers, both from boost, TR1 or even the lowly (but often efficient enough) auto_ptr (but you must know its limitations).
RAII is the basis of both exception safety and resource disposal in C++, and no other pattern (sandwich, etc.) will...
What is a covariant return type?
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From the release of JDK 1.5, covariant types were introduced in Java. and I'll explain it to you with a simple case, : When we override a function the function is allowed to make changes to it's behaviour that's what you get ...