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What is the purpose of setting a key in data.table?
I am using data.table and there are many functions which require me to set a key (e.g. X[Y] ). As such, I wish to understand what a key does in order to properly set keys in my data tables.
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Dark theme in Netbeans 7 or 8
Is there a way to have a dark theme in Netbeans?
6 Answers
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Get list of passed arguments in Windows batch script (.bat)
I'd like to find a Windows batch counterpart to Bash's $@ that holds a list of all arguments passed into a script.
14 An...
CSS disable text selection
Currently, I have put this in the body tag to disable text selections:
9 Answers
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Display a float with two decimal places in Python
...0'
The result of the operator is a string, so you can store it in a variable, print etc.
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What's the difference between “groups” and “captures” in .NET regular expressions?
I'm a little fuzzy on what the difference between a "group" and a "capture" are when it comes to .NET's regular expression language. Consider the following C# code:
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Java - sending HTTP parameters via POST method easily
... sent as part of the URL.
In a POST request, the parameters are sent as a body of the request, after the headers.
To do a POST with HttpURLConnection, you need to write the parameters to the connection after you have opened the connection.
This code should get you started:
String urlParameters ...
How to convert a string to an integer in JavaScript?
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The simplest way would be to use the native Number function:
var x = Number("1000")
If that doesn't work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods.
parseInt:
var x = parseInt("1000", 10); /...
Get last field using awk substr
I am trying to use awk to get the name of a file given the absolute path to the file.
For example, when given the input path /home/parent/child/filename I would like to get filename
I have tried:
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What does a tilde do when it precedes an expression?
I saw it in an answer, and I've never seen it before.
5 Answers
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