https://github.com/look/lazy-numerical-analysis

Example code for a blog post
https://github.com/look/lazy-numerical-analysis

haskell numerical-analysis ruby

Last synced: about 1 month ago
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Example code for a blog post

• Host: GitHub
• URL: https://github.com/look/lazy-numerical-analysis
• Owner: look
• Created: 2017-05-13T04:43:40.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2017-05-24T05:10:23.000Z (over 7 years ago)
• Last Synced: 2024-12-31T14:32:00.357Z (about 1 month ago)
• Topics: haskell, numerical-analysis, ruby
• Language: Ruby
• Homepage: http://www.recursion.org/2017/5/24/exploring-infinite-sequences
• Size: 2.93 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Lazy Numerical Analysis

This takes Haskell code by [John Hughes](https://en.wikipedia.org/wiki/John_Hughes_(computer_scientist)) and translates it to Ruby to play around with using infinite sequences in an eagerly evaluated language. It is the companion code for a [blog post on using infinite sequences in Haskell and Ruby](http://www.recursion.org/2017/5/24/exploring-infinite-sequences).

## Running the code

For Ruby, you need Ruby 2.0 or greater:

```

$ irb

require_relative 'numerical_analysis'

sqrt 1000

# => 31.622776601684336

```

I used Stack to install Haskell. Then you can run:

```

$ stack ghci

:load numerical_analysis.hs

*Main> sqrt 1000

31.622776601684336

*Main> deriv (**2) 5

10.00006103515625

```

## Futher reading

* [Why Functional Programming Matters](https://www.csee.umbc.edu/courses/331/fall10/resources/papers/whyfp.pdf)

* [Modular Code and Lazy Evaluation in Haskell](https://hackhands.com/modular-code-lazy-evaluation-haskell/)

* [Infinite Sequences in Ruby](https://rossta.net/blog/infinite-sequences-in-ruby.html)

* [Exploring infinite sequences](http://www.recursion.org/2017/5/24/exploring-infinite-sequences)