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How can I add numbers in a Bash script?
...nal tools you can use:
num=$(awk "BEGIN {print $num1+$num2; exit}")
num=$(python -c "print $num1+$num2")
num=$(perl -e "print $num1+$num2")
num=$(echo $num1 + $num2 | bc) # Whitespace for echo is important
You can also use scientific notation (for example, 2.5e+2).
Common pitfalls:
When se...
How do I compare strings in Java?
...loading of operators, which makes this part of Java clunkier than in C# or Python. And since Java doesn't have extension methods, you can't write your own utility to extend java.lang.String. Right? Any thoughts on subclassing String, adding that static utility method, and then always using MyString ...
How do I use valgrind to find memory leaks?
...n even be used for other
languages when configured properly (see this for Python).
To run Valgrind, pass the executable as an argument (along with any
parameters to the program).
valgrind --leak-check=full \
--show-leak-kinds=all \
--track-origins=yes \
--verbose \
...
In Windows Azure: What are web role, worker role and VM role?
...th queue messages consumed by all instances).
You can run .NET, Java, php, python, node, ruby, etc. You just need to distribute the appropriate runtime code along with your project code. All languages can make REST calls to the Azure API, and several languages (including those mentioned above) have ...
Prevent RequireJS from Caching Required Scripts
...figuration, then I can serve my app in javascript-only mode with a 10 line python http server with all caching turned off. This has scaled up for me to a quite large "enterprisey" application with hundreds of restful webservice endpoints. We even have a contracted designer who can work with our real...
Correct way to pass multiple values for same parameter name in GET request
...
I am describing a simple method which worked very smoothly in Python (Django Framework).
1. While sending the request, send the request like this
http://server/action?id=a,b
2. Now in my backend, I split the value received with a split function which always creates a list.
id_filter = ...
Setting different color for each series in scatter plot on matplotlib
...
so it is kinda complicated to read and in 2013 I used python for 1 year. so why would people want to know how to do it? after get it worked, I never bother to look at it again. my project was to draw a lot of visualisation, with above code, the work flow was streamlined.
...
Java 7 language features with Android
...o 500k+ devices.
To ignore this warning, add the following to your lint.xml:
<issue id="NewApi">
<ignore regexp="Try-with-resources requires API level 19"/>
</issue>
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When should you use 'friend' in C++?
... to functions or functions as first class objects) is allowed in C#, Java, Python and many others.
– André Caron
Oct 21 '10 at 18:32
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Is Java really slow?
...tc.) can beat it; however, Java can be more than 10x as fast as PHP, Ruby, Python, etc. There are specific areas where it can beat common compiled languages (if they use standard libraries).
There is no excuse for "slow" Java applications now. Developers and legacy code/libraries are to blame, far ...