On outsourcing

Outsourcing hurts innovation when people aren’t able to communicate frequently and casually. Frequent and casual conversations are impossible across nine time zones.

Farming out development to legions of programmers overseas will not create a differentiation advantage. When a software company outsources development, that company loses its capacity to innovate and its competitive advantage.

If you’re building an innovative software company, you need to retain your best and brightest programmers internally. Software companies entirely based in India can successfully innovate over the long term, as can U.S. companies or companies based anywhere else.

- From Joel Spolsky's 'The Best Software Writing I'

Woking with multiple rails versions on same machine

If you have multiple rails versions installed like this -

rails (1.2.6, 1.2.0, 1.1.6)
Web-application framework with template engine, control-flow layer,
and ORM.

And you want to create 3 applications using 3 different versions of rails, then here is the command -

$ rails _<railsversion>_ <app name>

To create rails application using rails-1.2.0

$ rails _1.2.0_  r120

To create rails application using rails-1.2.6

$ rails _1.2.6_  r126

To create rails application using rails-1.1.6

$ rails _1.1.6_  r116

Is this documented anywhere?

Concurrency starts now!

Reached chapter 7 of programming erlang. Concurrency starts now.

Let see how my brain-system handles this :)

3 liner list reversal

-module(mylist).
-export([reverse/1]).

reverse(L) -> reverse(L, []).
reverse([H|T], Rl) -> reverse(T, [H|Rl]);
reverse([], Rl) -> Rl.

Thats it!

Here is the usage -
mylist:reverse([0, 1, 2, 3, 4, 5]).

should give -
[5, 4, 3, 2, 1, 0]