The document discusses various features of CoffeeScript including: - Pattern matching for variable swaps, declarations, and object matching - OOP styles using classes, inheritance, and mixins - Building CoffeeScript projects and integrating with asset managers - References for further CoffeeScript learning

1. CoffeeScript a-zA-Z
Vyacheslav Voronchuk
voronchuk@wm-software.com
Skype: voronhukvk
http://ua.linkedin.com/in/voronchuk/

2. Pattern-matching

3. # Variable swaps
[a, b] = [b, a]
# Variable declaration
[fname, lname, sname] =
['Vyacheslav', 'Voronchuk', 'Kazimirovich']
alert "#{lname} #{fname} #{sname}"
# Variable declaration with splats
[first, other..., last] = [1,2,3,4,5,6,7]
alert "#{first} #{JSON.stringify(other)} #{last}"
# Object matching
coords =
x: 150
y: 100
z: 5
{ x: declaredX, y: declaredY, z: declaredZ } = coords
alert "#{declaredX}, #{declaredY}, #{declaredZ}"

4. person =
fname: 'Vyacheslav'
lname: 'Voronchuk'
languages: [
'Russian'
'English'
'Ukranian'
'French'
'German'
]
coding: [
'javascript', 'php'
'ruby', 'python'
'erlang', 'clojure'
'C++', 'Pascal'
'ML'
]
{
fname: name,
languages: [bestLang, other..., worstLang],
coding: [loveCode]
} = person
alert "#{name} speaks #{bestLang} and have some expirience
in #{worstLang}.
He likes to code with the help of #{loveCode}"

5. # (coords, 3dPoint, options) ->
move = ([x, y, z], object, { animate: anim, type: type }) ->
alert "Move #{object} to (#{x} #{y} #{z}) with options:
animate: #{anim}
animation type: #{type}"
move [100,200,5],
'Point object',
animate: true
type: 'slide'

6. OOP style in CoffeeScript

7. class Page
constructor: (@title, @description, @rawComments, { canCopy: @canCopy, hidden: @hidden }) ->
Page.totalPages++
alert "Article '#{title}' about '#{description}'"
# Prototype properties
copy: ->
if @canCopy then new Page @title, @description, @rawComments,
canCopy: @canCopy
hidden: @hidden
else
throw 'Sorry, access denied'
hide: -> @hidden = true unless @hidden
# Class-level properties
@totalPages: 0
@count: -> alert @totalPages
NewPage = new Page 'Coffeescript a-zA-Z',
'Advanced features provided by CoffeeScript'
[]
canCopy: true
hidden: false
NewPage.copy()
Page.count()

8. class Container
constructor: (@children = []) ->
addChild: (child) ->
child.parentContainer = @
@children[@children.length] = child
removeChild: (child) ->
@children = (item for item in @children when item != child)
child.parentContainer = null
class Containable extends Container
constructor: (parentContainer, children) ->
if children then super children else super()
parentContainer.addChild @ if parentContainer
remove: -> @parentContainer.removeChild @ if @parentContainer
moveTo: (newContainer) ->
@remove()
newContainer.addChild @
class Comment extends Containable
constructor: (@text, parentContainer) ->
super parentContainer if parentContainer
getText: -> @text
class Page extends Container
Page1 = new Page
Comment1 = new Comment 'Root comment', Page1
alert "Childrens: #{Page1.children.length}"
Comment2 = new Comment 'Nested comment', Comment1
Comment2.moveTo Page1
alert "Childrens: #{Page1.children.length}"

9. class Container
constructor: (@children = []) ->
addChild: (child) ->
unless child instanceof Containable then throw 'Invalid child type'
child.parentContainer = @
@children[@children.length] = child
removeChild: (child) ->
unless child instanceof Containable then throw 'Invalid child type'
@children = (item for item in @children when item != child)
child.parentContainer = null
class Containable extends Container
constructor: (parentContainer, children) ->
if children then super children else super()
parentContainer.addChild @ if parentContainer
remove: -> @parentContainer.removeChild @ if @parentContainer
moveTo: (newContainer) ->
unless newContainer instanceof Container then throw 'Invalid container type'
@remove()
newContainer.addChild @
class Comment extends Containable
constructor: (@text, parentContainer) ->
super parentContainer if parentContainer
getText: => @text
class Page extends Container
class Author
try
Page1 = new Page
Author1 = new Author
Page1.addChild Author1
catch e
alert e
Comment1 = new Comment 'Root comment', Page1
alert Comment1.getText.call window

10. extend = (obj, mixin) ->
obj[name] = method for name, method of mixin
obj
Container =
addChild: (child) ->
child.parentContainer = @
@children[@children.length] = child
removeChild: (child) ->
@children = (item for item in @children when item != child)
child.parentContainer = null
Containable =
remove: -> @parentContainer.removeChild @ if @parentContainer
moveTo: (newContainer) ->
@remove()
newContainer.addChild @
class Comment
extend Comment::, Container
extend Comment::, Containable
constructor: (@text, parentContainer, @children = []) -> parentContainer.addChild @ if parentContainer
getText: => @text
class Page
extend Page::, Container
constructor: (@children = []) ->
Page1 = new Page
Comment1 = new Comment 'Root comment', Page1
alert "Childrens: #{Page1.children.length}"
Comment2 = new Comment 'Nested comment', Comment1
Comment2.moveTo Page1
alert "Childrens: #{Page1.children.length}"

11. moduleKeywords = ['extended', 'included']
class Module
@extend: (obj) ->
for key, value of obj when key not in moduleKeywords
@[key] = value
obj.extended?.apply(@)
this
@include: (obj) ->
for key, value of obj when key not in moduleKeywords
# Assign properties to the prototype
@::[key] = value
obj.included?.apply(@)
this
# Example
classProperties =
find: (id) ->
create: (attrs) ->
instanceProperties =
save: ->
class User extends Module
@extend classProperties
@include instanceProperties
user = User.find(1)
user = new User
user.save()
# Callbacks
ORM =
find: (id) ->
create: (attrs) ->
extended: ->
@include
save: ->
class User extends Module
@extend ORM

12. Build CoffeeScript
$ coffee --compile --output lib/ src/
$ coffee --watch --compile script.coffee
$ coffee -o lib/ -cw src/
Asset managers: RoR, Assetic for PHP
ect
Grunt.js
RequireJS with "cs" plugin
Cakefile

13. References
CoffeeScript official page
The Little Book on CoffeeScript
CoffeeScript: Accelerated JavaScript
Development, by Trevor Burnham

14. Thank you!
Vyacheslav Voronchuk
http://wm-software.com/
voronchuk@wm-software.com
Skype: voronhukvk
http://ua.linkedin.com/in/voronchuk/