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Add up a column of numbers at the Unix shell
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... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
Edit: added the - argument for portability, thanks @Dogbert and @Owen.
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How do I convert a double into a string in C++?
...y:
std::string str = boost::lexical_cast<std::string>(dbl);
The Standard C++ way:
std::ostringstream strs;
strs << dbl;
std::string str = strs.str();
Note: Don't forget #include <sstream>
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Good tool to visualise database schema? [closed]
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I just got what I needed from sqlfairy. Simple and quick.
– fivedogit
May 21 '15 at 20:37
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Android Left to Right slide animation
...ndroid"
android:shareInterpolator="false">
<translate android:fromXDelta="-100%" android:toXDelta="0%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="700"/>
</set>
This is for right to left animation:
<set xmlns:android="http://s...
How to stop and restart memcached server?
How to stop and restart memcached server 1.4.5 in linux OS from command line?
12 Answers
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What is a mutex?
... a lock request to the OS. When the OS detects that the mutex was released from a thread, it merely gives it to you, and lock() returns - the mutex is now yours and only yours. Nobody else can steal it, because calling lock() will block him. There is also try_lock() that will block and return true w...
How do I output coloured text to a Linux terminal?
...ally the letter m. The numbers describe the colour and format to switch to from that point onwards.
The codes for foreground and background colours are:
foreground background
black 30 40
red 31 41
green 32 42
yellow 33 43
blue ...
Installation Issue with matplotlib Python [duplicate]
...matplotlib/matplotlibrc there and add the following code: backend: TkAgg
From this link you can try different diagrams.
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Mono - 跨平台 .NET运行环境 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...for their wrapper classes which allow Apple's Cocoa frameworks to be userd from Mono.
Mono 跨平台 NET
Why should I use Restify?
...nd would act like a custom-built framework for building REST APIs. Restify from its intro is recommended for the same case.
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