20130530

30/5 Meeting notes

Olle - ActiveRecord/Enumerable/Hash trix

def followed_keyphrases_dict
  Hash[ self.books
    .joins(:words)  # ActiveRecord: INNER JOIN
    .uniq           # ActiveRecord: DISTINCT
    .select('words.id AS id, words.text AS keyphrase') # ActiveRecord: Reduce data fetching
    .group_by {|fetched_sql_data| fetched_sql_data.keyphrase }  # Enumerable: Key by the aliased keyphrase field
    .collect {|keyword, item| [keyword, item[0].id]  } # Enumerable: Create list of pairs
  ] # Hash: Return as hash from the list of pairs
end

Joel - Gems Gems Gems

Configliere

Help your command line application with:

• options parsing
• arguments parsing
• configuration files
• environment variables
• --help generation

commander

commander init simple-app.rb

vcr

Record your test HTTP request and replay the during future tests, fast test!

http://relishapp.com/vcr/vcr

phraseapp

• PhraseApp, https://phraseapp.com/
• Phrase examples/gems, https://github.com/phrase

Lasse - rspec-hue

• Connecting rspec to Philips Hue, found at Apple Store, with rspec-hue
• An alternative to PhraseApp, LocaleApp

Felix - Queue

Use Queue to keep synchronous interface while performing work in parallel (gist)

Björn - NullObjectPattern

• [Null Object Pattern - Wikipedia] (http://en.wikipedia.org/wiki/Null_Object_pattern)
• [Naught by Avdi Grimm] (https://github.com/avdi/naught)

Andreas - Hypermedia API javascript client

How to avoid traffic to your website:

• HyperMedia and Linked Cache Invalidation
• One year browser caching of all resources except root resource
• Root resource contains URL links with a version
• When a resource changes the version changes, and the root resource will be updated - Linked Cache Invalidation