Setting SSH public-key login in 5 seconds

Local (the computer to log in from):

ssh-keygen -t dsa

Remote (the computer to log in):

cat ~/.ssh/id_dsa.pub | ssh -l REMOTE_USER REMOTE_SERVER 'cat >> ~/.ssh/authorized_keys'

That's it!

Wired behavior of NaN in Java...

float x = Float.NaN
Float X = new Float(x)
System.out.println(x == x)      // false
System.out.println(X.equals(X)) // true

....WTF?

Resources for programming languages

Rust
Rust, an Anti-Sloppy Programming Language
Rust Borrow and Lifetimes

JavaScript
Douglas Crockford: "Crockford on JavaScript -- Scene 6: Loopage" (52 min.)

Node.js
Why node.js is Cool

Algorithms and complexity theory
The Art Gallery Guardian