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How can a string be initialized using “ ”?
...age for strings with the same contents to conserve storage. String objects allocated via new operator are stored in the heap, and there is no sharing of storage for the same contents.
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Look up all descendants of a class in Ruby
...essentially a way to access anything and everything that's currently using allocated memory, so iterating over every single one of its elements to check if it is a sublass of the Animal class isn't ideal.
In the code below, the inherited Animal class method implements a callback that will add any ...
Iterating each character in a string using Python
...thon 2.x, range() creates a list, so for a very long length you may end up allocating a very large block of memory. At the very least use xrange() in those cases. Also, repeated indexing of the same string is much slower than iterating directly over the string. If you need the index, use enumerate()...
What does T&& (double ampersand) mean in C++11?
...just be destroyed; why not make use of the resources the temporary already allocated? In C++03, there's no way to prevent the copy as we cannot determine we were passed a temporary. In C++11, we can overload a move constructor:
foo(foo&& other)
{
this->length = other.length;
this...
Switch on ranges of integers in JavaScript [duplicate]
...when minified remains a switch, complete with "switch", "case" and "break" tokens, and as a result is considerably longer in code.
How switch(true) works
I think "switch(true) is obscure, but it seems some people just want to use it, so here's an explanation of why it works...
A switch/case state...
What is a callback URL in relation to an API?
...hen your application could use this authorization code to request a access token with the identity provider which has a much longer lifetime.
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The easiest way to transform collection to array?
...bly because it's an intrinsic.
It can avoid zero-filling the freshly allocated array because it knows the
entire array contents will be overwritten. This is true regardless of what
the public API looks like.
The implementation of the API within the JDK reads:
default <T> T[] to...
What's the difference between a web site and a web application? [closed]
...ites are primarily informational. In this sense, http://cnn.com and http://php.net are websites, not web applications.
Web applications primarily allow the user to perform actions. Google Analytics, gmail, and jslint are web applications.
They are not entirely exclusive. A university website lik...
Python strptime() and timezones?
...thon2.7/site-packages/dateutil/parser.py", line 310, in parse res, skipped_tokens = self._parse(timestr, **kwargs) TypeError: 'NoneType' object is not iterable
– wanghq
Apr 29 '14 at 0:16
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Configuring Vim for C++
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NERDTree http://www.vim.org/scripts/script.php?script_id=1658
Exuberant ctags (vim already supports the hotkeys natively) http://ctags.sourceforge.net/
taglist: http://vim-taglist.sourceforge.net/
snipmate: http://www.vim.org/scripts/script.php?script_id=2540
I do...