Add one liner method memoization to ruby classes. This is solely syntactic prettiness and does not add much functionality over basic ruby.

I wrote this gem to help reduce boilerplate in some code where memoization was common and to ensure that memoization was consistent across a project and handled the "falsey" case correctly.

First, the simple example:

def french_articles
  @french_articles ||= Article.where(language: 'french')
end

becomes the slightly shorter

memo(:french_articles) { Article.where(language: 'french') }

Falsey error prone case:

def bad_memo
  @bad_memo ||= expensive_method
end

def expensive_method
  sleep 5
  false
end

The "memoized" value would be loaded each time through since its value is falsey. This gem handles that case well:

memo(:good_memo) { expensive_method }

Add the following to your Gemfile and bundle install:

gem "memo_helper", '~> 0.0.1'

Memoist

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