Switch-To-Coffeescript-Code-Snippets

1.coffee

methodfoo : (arg0) ->
  func = => x = @someproperty
  func()

1.js

SomeClass.prototype.methodfoo = function (arg0) {
  var thisref = this;

  var func = function () {
    var x = thisref.someproperty;
  }
  func();
}

2.coffee

for item in arr
  process(item)

2.js

for (_i = 0, _len = arr.length; _i < _len; _i++) {
  item = arr[_i];
  process(item);
}

3.coffee

foo = ({newArg, arg0, arg1}) ->
  newArg ?= 42 # default value

foo(arg0:'A', arg1:1)
foo(newArg:24, arg0:'B', arg1:2)

4.coffee

class Person
  constructor : ({name}) ->
    @name = name

  getName : () ->
    return @name

class Manager extends Person
  getReportingEngineers : () ->

class Engineer extends Person
  getManager : () ->

5.coffee

proplist = _(itemlist).map (x)->x.property

5.js

proplist = _(itemlist).map(function(x) {
  return x.property;
});

6.coffee

"My name is #{@name}. I am #{@age} years old"

6.js

"My name is " + this.name + ". I am " + this.age + " years old";