https://github.com/elmassimo/pakiderm

🐘 Pakiderm will never forget the return value
https://github.com/elmassimo/pakiderm

memoization memoize ruby

Last synced: 7 months ago
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🐘 Pakiderm will never forget the return value

• Host: GitHub
• URL: https://github.com/elmassimo/pakiderm
• Owner: ElMassimo
• License: mit
• Created: 2014-02-25T19:47:58.000Z (about 12 years ago)
• Default Branch: main
• Last Pushed: 2021-02-24T15:21:55.000Z (about 5 years ago)
• Last Synced: 2025-09-25T06:32:23.946Z (7 months ago)
• Topics: memoization, memoize, ruby
• Language: Ruby
• Homepage:
• Size: 71.3 KB
• Stars: 7
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE.txt

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README

          
Pakiderm [![Gem Version](https://badge.fury.io/rb/pakiderm.svg)](https://rubygems.org/gems/pakiderm) [![Build Status](https://github.com/ElMassimo/pakiderm/workflows/build/badge.svg)](https://github.com/ElMassimo/pakiderm/actions) [![Test Coverage](https://codeclimate.com/github/ElMassimo/pakiderm/badges/coverage.svg)](https://codeclimate.com/github/ElMassimo/pakiderm) [![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/ElMassimo/queryable/blob/master/LICENSE.txt)

=====================

Allows you to unobtrusively memoize methods without parameters.

```ruby

class Stopwatch

  extend Pakiderm

  def start

    @started_at = Time.now

  end

  def stop

    elapsed_time

  end

  memoize \

  def elapsed_time

    Time.now - @started_at

  end

end

```

Memoized methods will only be called the first time; the result will be stored and returned on subsequent invocations.

```ruby

stopwatch = Stopwatch.new

stopwatch.start

stopwatch.stop         # Example: 3.991826

stopwatch.elapsed_time #       => 3.991826

```

You can also pass a list of methods that should be memoized:

```ruby

memoize :complex_calculation, :api_response, :db_query

```

## Background

Pakiderm adds a method by using `Module#prepend` in order to"intercept" calls to the original method and provide memoization.

### Caveat

If you override the method in a subclass, Pakiderm's method won't be able to intercept calls to the subclass' method, so you would need to call `memoize` again in the subclass.