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Ruby: extend self
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For me it always helps to think of extend as include inside the singleton class (also known as meta or eigen class).
You probably know that methods defined inside the singleton class are basically class methods:
module A
class << self
def x
puts 'x'
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How do I Search/Find and Replace in a standard string?
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#include <boost/algorithm/string.hpp> // include Boost, a C++ library
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std::string target("Would you like a foo of chocolate. Two foos of chocolate?");
boost::replace_all(target, "foo", "bar");
Here is the official ...
Determining if a variable is within range?
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Use the === operator (or its synonym include?)
if (1..10) === i
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Exceptions in .gitignore [duplicate]
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The reason - " It is not possible to re-include a file if a parent directory of that file is excluded. Git doesn’t list excluded directories for performance reasons, so any patterns on contained files have no effect, no matter where they are defined. " [git-scm.c...
C++ convert from 1 char to string? [closed]
...ine. Since it doesn't you can try stringstream. An example is below:
#include <sstream>
#include <string>
std::stringstream ss;
std::string target;
char mychar = 'a';
ss << mychar;
ss >> target;
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Is it possible to make abstract classes in Python?
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Android Archive Library (aar) vs standard jar
...AARs vs Jars:
The main difference between a Jar and a AAR is that AARs include
resources such as layouts, drawables etc. This makes it a lot easier
to create self-contained visual components. For example if you have
multiple apps that use the same login screen, with Jars you could
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WebSockets vs. Server-Sent events/EventSource
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Execution time of C program
...t but only for simple programs, because it'll take the whole program time, including input, output, etc.
– phuclv
Dec 17 '15 at 6:55
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