sent-hil

This is my current Gemfile for River.

source 'http://rubygems.org'

gem 'god' # monitoring of Goliath & Sinatra apps

group :default do
  gem 'yajl-ruby', :require => 'yajl' # fast JSON dumping/parsing
end

sent-hil

# ios

cd /Users/sent-hil/Documents/play/phonegap/sdks/lib/ios
./bin/create ../../../ios com.{name} {name}
cd ../../../ios

# android (doesn't work, use http://docs.phonegap.com/en/2.0.0/guide_getting-started_android_index.md.html#Getting%20Started%20with%20Android instead)
cd /Users/sent-hil/Documents/play/phonegap/sdks/lib/android
./bin/create ../../../ios com.{name} {name}

sent-hil

GOAL: Become a much, much better programmer:
        Get better at Ruby and OOP in general,
        Open black boxes and see what goes on underneath.

TIME: Oct 22 - Dec 20.

IDEAS (all open sourced):
* Learn how interpreters work.
Status: Finished Scheme interpreter in Ruby. Rewrite in Go?

sent-hil

WARNING: this is a draft and the list is by no means complete.

Methodology:

1. Meaningful product:
2. Do I use it?
3. Does it solve a real and interesting problem?
4. Is it important to the well being of others?
5. Are they small?
6. Tech stack - Preferably Rails + MongoDb with a hint of Javascript/Coffeescript. As long as it's not Java.
7. Company culture

sent-hil

"If we did the things we are capable of doing, we would literally astound ourselves." Edison

"When the student is ready, the teacher appears." Buddhist proverb

"Too busy to care."

Berklee College of Music keynote by Sivers: https://sivers.org/berklee6

The Mystery Box by JJ Abrams: http://www.ted.com/talks/j_j_abrams_mystery_box.html

sent-hil

Debug in node

See: https://github.com/dannycoates/node-inspector

# Install node npm
npm -g install node-inspector

# Start debugger
node-inspector &
node --debug launch.js

sent-hil

Setup cron on mac

$ crontab -e

stop vim from saving tmp files temporarily for crontab :set backupskip=/tmp/*,/private/tmp/*

0 22 * * * bash -c 'source /Users/sent-hil/.rvm/scripts/rvm && /usr/bin/env ruby /Users/sent-hil/Documents/play/single/twitter_status.rb'

sent-hil

Monads

Monads are a way to chain functions together. Maybe monad (from Haskell) is used to chain functions together when the functions might fail. It assumes:

1. If I have Nothing, stop computing.
2. If I have Something, pass it to next function.
3. That function may return Something or Nothing. Go back to Step 1.

x ||= y # x = y unless x

sent-hil

--------------------------
Interfaces vs. Duck typing

Duck typing isn't really about checking whether the things you need are there and then using them.
Duck typing is about just using what you need.

Interfaces are named collections of method signatures.

https://gobyexample.com/interfaces
--------------------------

sent-hil

http://blog.firsthand.ca/2010/08/questions-asked-in-ruby-on-rails-job.html

Q. What is polymorphism?
* Allows values of different data types to be handled using an uniform interface.
* 3 types:
  * Overloading: Methods of same name exists in different class.
      Ex: + method operates differently for integers and floats.
  * Parametric: Methods of same name, but accept diff. parameters.
  * Inclusion: The ability to redefine methods in inherited classes.