Coffeescript
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I was cleaning up my files this morning, and found this short little intro talk I gave at Winnipeg.RB a few months back when rails 3.1 came out with CoffeeScript enabled by default. ...

I was cleaning up my files this morning, and found this short little intro talk I gave at Winnipeg.RB a few months back when rails 3.1 came out with CoffeeScript enabled by default.

It's a micro introduction to C

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Coffeescript Presentation Transcript

  • 1. CoffeeScript Like JavaScript, but without the horrible.Sunday, 27 November, 11
  • 2. Burke Libbey Me @burkelibbeySunday, 27 November, 11
  • 3. The 5 Second PitchSunday, 27 November, 11
  • 4. var foo = function() { JavaScript return "bar"; } CoffeeScript foo = -> "bar"Sunday, 27 November, 11
  • 5. “Sold! What did I just buy?”Sunday, 27 November, 11
  • 6. “CoffeeScript is a little language that compiles into JavaScript” – Jeremy Ashkenas, CoffeeScript authorSunday, 27 November, 11
  • 7. foo = -> "bar" CoffeeScript Compiler (function() { var foo; foo = function() { return "bar"; }; }).call(this);Sunday, 27 November, 11
  • 8. “What’s wrong with JavaScript?” Browser inconsistencies Terrible DOM API Redundant syntaxSunday, 27 November, 11
  • 9. “What’s wrong with JavaScript?” Browser inconsistencies Terrible DOM API Redundant syntax Most of the issues people have with JavaScript boil down to these three points.Sunday, 27 November, 11
  • 10. “What’s wrong with JavaScript?” Browser inconsistencies Terrible DOM API Redundant syntax jQuery does a fantastic job of shielding you from these two.Sunday, 27 November, 11
  • 11. “What’s wrong with JavaScript?” Browser inconsistencies Terrible DOM API Redundant syntax CoffeeScript fixes this one.Sunday, 27 November, 11
  • 12. So what’s wrong with the syntax? function(x) { return x * x; } For a functional language, having to write “function” and “return” everywhere is more than a little strange.Sunday, 27 November, 11
  • 13. Anonymous Function Syntax JavaScript function(x) { return x * x; } Scheme (lambda (x) (* x x)) Erlang fun(X) -> X * X end. CoffeeScript (x) -> x * x Haskell x -> x * x Clojure #(* % %)Sunday, 27 November, 11
  • 14. “I’m a masochist, and I like typing a lot. Give me another reason.”Sunday, 27 November, 11
  • 15. Rails 3.1 includes CoffeeScript by default.Sunday, 27 November, 11
  • 16. ...to the chagrin of hypocrites the world over.Sunday, 27 November, 11
  • 17. Sunday, 27 November, 11
  • 18. Fighting Rails is usually doomed to failure.Sunday, 27 November, 11
  • 19. So just suck it up and learn CoffeeScript.Sunday, 27 November, 11
  • 20. Without further ado: CoffeeScript Whirlwind tourSunday, 27 November, 11
  • 21. three = -> 3 square = (x) -> x * x add = (x, y) x + ySunday, 27 November, 11
  • 22. Default values! fill = (container, liquid = "coffee") -> "Filling the #{container} with #{liquid}..." ...and string interpolation!Sunday, 27 November, 11
  • 23. YAML-like hash literals work kids = brother: name: "Max" age: 11 sister: name: "Ida" age: 9Sunday, 27 November, 11
  • 24. Never type “var” again! CoffeeScript does it for you.Sunday, 27 November, 11
  • 25. mood = greatlyImproved if singingSunday, 27 November, 11
  • 26. if happy and knowsIt clapsHands() chaChaCha() else showIt()Sunday, 27 November, 11
  • 27. date = if friday then sue else jillSunday, 27 November, 11
  • 28. options or= defaultsSunday, 27 November, 11
  • 29. I’m out of slides. Time for live-coding!Sunday, 27 November, 11
  • 30. Thanks!Sunday, 27 November, 11