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How to randomize (or permute) a dataframe rowwise and columnwise?
...,]
> df2
a b c
3 0 1 0
4 0 0 0
2 1 0 0
1 1 1 0
By default sample() randomly reorders the elements passed as the first argument. This means that the default size is the size of the passed array. Passing parameter replace=FALSE (the default) to sample(...) ensures that sampling is done withou...
How is a non-breaking space represented in a JavaScript string?
... answered Mar 8 '11 at 20:35
Andrew MooreAndrew Moore
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How do I get my C# program to sleep for 50 msec?
...Combination of previous 2
It usually combines processing efficiency of 1. and preciseness + ability to do something of 2.
for 1. - Loose waiting in C#:
Thread.Sleep(numberOfMilliseconds);
However, windows thread scheduler causes acccuracy of Sleep() to be around 15ms (so Sleep can easily wa...
Way to get all alphabetic chars in an array in PHP?
...t all alphabetic chars (A-Z) in an array in PHP so I can loop through them and display them?
14 Answers
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What vim plugins are available for Eclipse? [closed]
I have found three and would like to know if there are others and what their advantages or disadvantages might be:
4 Answer...
How to set a JVM TimeZone Properly
...ault GMT timezone instead of an OS defined timezone. My JDK version is 1.5 and the OS is Windows Server Enterprise (2007)
7...
static files with express.js
I want to serve index.html and /media subdirectory as static files. The index file should be served both at /index.html and / URLs.
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C# using streams
...treams are kind of mysterious to me. I don't know when to use which stream and how to use them. Can someone explain to me how streams are used?
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RVM is not working in ZSH
I'd like to try out the ZSH shell on my Mac, but I also do a lot of Ruby and Rails development, so I use RVM quite a bit too. The problem is that I can't seem to get RVM to work in ZSH, and it's working fine in the default Bash shell:
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Where is debug.keystore in Android Studio
... need to enable google+ api, so I need the debug.keystore . I switched to Android Studio and do not know where it is. I can find it in eclipse at path ~/.android/debug.keystore.
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