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How to randomly sort (scramble) an array in Ruby?
I'd like to have my array items scrambled.
Something like this:
5 Answers
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How to enumerate a range of numbers starting at 1
I am using Python 2.5, I want an enumeration like so (starting at 1 instead of 0):
12 Answers
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Sending websocket ping/pong frame from browser
I keep reading about ping/pong messages in websockets to keep the connection alive, but I'm not sure what they are. Is it a distinct frame type? (I don't see any methods on a javascript WebSocket object in chrome related to ping-pong). Or is it just a design pattern (e.g. I literally send "ping" o...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
Matplotlib offers there functions:
3 Answers
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Speed up the loop operation in R
I have a big performance problem in R. I wrote a function that iterates over a data.frame object. It simply adds a new column to a data.frame and accumulates something. (simple operation). The data.frame has roughly 850K rows. My PC is still working (about 10h now) and I have no idea about the...
Difference between “git checkout ” and “git checkout -- ”
http://norbauer.com/notebooks/code/notes/git-revert-reset-a-single-file
2 Answers
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Can someone explain collection_select to me in clear, simple terms?
I am going through the Rails API docs for collection_select and they are god-awful.
2 Answers
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How to convert a private key to an RSA private key?
Let me explain my question first. I bought a certificate from a CA and used the following format to generate the csr and the private key:
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How do I write unencoded Json to my View using Razor?
I'm trying to write an object as JSON to my Asp.Net MVC View using Razor, like so:
3 Answers
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OSGi: What are the differences between Apache Felix and Apache Karaf?
Apache Karaf is a sub project of Apache Felix . It is defined as "a lightweight OSGi container".
3 Answers
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