Paradigm Wars: Object Oriented Vs Functional Programming in creating MarkParser
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In this project my team and I tried our hands-on Functional Programming. Our aim was to compare challenges, efforts, and ease in developing a same application "MarkParser" (a Markdown parser) using both the paradigms.
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Paradigm Wars: Object Oriented Vs Functional Programming in creating MarkParser
- 1. O B J E C T O R I E N T E D V S F U N C T I O N A L MARKPARSER
- 2. Utsav @kumar-utsav Bhashwanth @bhashwanth Our Team Rohit @rarora4 Yatish @yatish27
- 4. What is OO Programming? “Object-oriented programming (OOP) is a programming paradigm based on the concept of objects which are data structures that contain data, in the form of fields, often known as attributes; and code, in the form of procedures, often known as methods.” -Wikipedia
- 5. What is Functional Programming? “In computer science, functional programming is a programming paradigm, a style of building the structure and elements of computer programs, that treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data.” -Wikipedia
- 6. MarkParser A package which converts markdown(.md) to HTML
- 7. Two Tracks
- 9. Design:Object Oriented using Ruby Class Document Main class which encapsulates markdown string. It carries out the parsing
- 10. Design:Object Oriented using Ruby Class Element - Base class for other element classes. - Every Html element is an instance of this class. - BlockElement: li, ol - InlineElement: strong, em
- 11. Design:Object Oriented using Ruby
- 12. Utilizes...Higher Order Functions Design:Functional Javascript
- 13. JSON Key-Value pair as dictionary Design: Functional Javascript
- 14. Map & Reduce algorithms STEP 1 Map STEP 2 Reduce STEP 3 Finalize Design: Functional Javascript
- 15. Demo...
- 16. Demo...
- 17. Testing...
- 18. Supported Tags Testing: Specification Sample Markdown containing all tags and equivalent HTML.
- 19. Rspec: Ruby testing framework Testing: Tools Jasmine: Javascript testing framework
- 20. Testing individual methods/functions in isolation Testing: Unit Tests Testing individual tags. eg h1, h2, ol
- 21. Assert equal entire markdown to HTML Testing: Integration Tests Test binary for file input, output files Added ‘Live’ editor for Javascript track
- 23. Travis CI - Github Hook on master commit. Testing: Automated Testing
- 25. Github issues based on Getting started, Research, Requirement Analysis, MVP, Tests, OO vs Functional Study Process: Github Issue
- 26. Bug, Code, Ruby, Javascript, Process, Prototype, Research, Redo, Results, Question, Help wanted, Group work Process: Github Issue Needs Review, Awaiting Developer’s Feedback, Ready to Merge, Merged
- 27. Process: Github Pull Requests & Labels
- 28. Methods: Github Pull Requests & Labels
- 29. Methods: Slack
- 32. When we were new to Object Oriented Programming Results & Discussion
- 33. when… we gained some expertise in OOPS Results & Discussion
- 34. and when… we started functional programming Results & Discussion
- 35. What can be the reason??? Results & Discussion
- 36. Can be the way we have been trained Results & Discussion
- 37. Or may be…. Results & Discussion
- 38. by default we think and talk in imperative terms Results & Discussion
- 39. but we soon realized... functional Results & Discussion
- 40. as we described our team knew only OOPS Results & Discussion
- 41. Results & Discussion we would like to share our experience
- 42. so initially functional == alien terms Results & Discussion
- 43. Our Solution... LEARN Results & Discussion
- 44. and the results of our learnings... MarkParser Results & Discussion
- 45. and some points for discussion... Results & Discussion
- 46. we think functional programming has higher expressibility Results & Discussion
- 47. Results & Discussion we also think higher order functions make a lot of sense in programming
- 48. Results & Discussion we also think higher order functions make a lot of sense in programming also gives you a chance to put high school mathematics into use
- 49. Part 1: Results & Discussion a lot less time is spent in building and operating on data structures Results & Discussion
- 50. code for functional is very concise in comparison to OOPS Results & Discussion
- 51. however, we feel data encapsulation and abstraction are easier to achieve in OOPS Results & Discussion
- 52. refactoring code is easier, without telling the other modules that don’t need to know Results & Discussion
- 53. and at many instances, it was easier for us to think in Object Oriented terms OBJECT Results & Discussion
- 54. rather than functional terms Results & Discussion
- 55. some also claims that making GUI is easier in OOPS but we have mixed opinion on that Results & Discussion
- 56. So the question is which paradigm is better? Results & Discussion
- 57. So the question is which paradigm is better? FUNCTIONAL?? Results & Discussion
- 58. So the question is which paradigm is better? FUNCTIONAL?? (NO) Results & Discussion
- 59. So the question is which paradigm is better? OOPS?? Results & Discussion
- 60. So the question is which paradigm is better? OOPS?? (NO) Results & Discussion
- 61. Its like a fight between a bear and an alligator, the terrain determines the outcome. Results & Discussion
- 62. OOPS is generally better when there are fixed set of OPERATIONS on things, and as code evolves new things are added (e.g. new class) Results & Discussion
- 63. Functional is generally good when there are fixed set of THINGS, and as code evolves new operations are added to existing things (e.g. avg func). DATA sum() avg() Results & Discussion
- 64. Conclusions...
- 65. Every programming paradigm consists of certain principal features that makes solving particular set of problems much easier/optimal Universal Programming paradigm is a myth Hybrid approach may involve some trade off, and chances of messing up may increase Conclusions
- 66. - https://github.com/jjyr/minidown - https://github.com/gettalong/kramdown - http://codepen.io/branneman/details/nbyrK/ - http://shamansir.github.io/blog/articles/generating-functional- parsers/ - http://code.google.com/p/pagedown/ Other work in this area
- 67. - Add CSS for HTML - Custom Markdown Tags - Support for All Markdown tags - Improve Testing Future Work
- 68. - http://c2.com/cgi/wiki?OoVsFunctional - http://www.srirangan.net/2011-12-functional-programming-in- javascript - http://functionaljavascript.blogspot.com/2013/07/monads.html - https://developer.mozilla.org/en- US/docs/Web/JavaScript/Guide/Regular_Expressions#special- word-boundary - http://stackoverflow.com/questions/2373524/how-do-i-display- values-of-an-json-object - http://www.ctrlshift.net/project/markdowneditor/ References