Talk:CoffeeScript

This article was nominated for deletion on 7 March 2011 (UTC). The result of the discussion was keep.

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Rails

There have been reports that official support for CoffeeScript 
will be included in the next point release of Ruby on Rails.[4]

'next' as in which version? Most of this article is not time-independent. as in, next year it will be wrong, and a year ago it was wrong. Say 'as of June 2010...' or something like that to qualify now-dependent statements. Think of someone reading this 5 or 10 years from now - your words will still be here.

OsamaBinLogin (talk) 17:26, 23 March 2011 (UTC)[reply]

Good point, but moot now that the official announcement has been made. Proper citation (a tweet by a Rails Core Team member, linking to a commit in the official Rails repository) included. --Trevor Burnham (talk) 15:55, 13 April 2011 (UTC)[reply]

Dialects, forks, derivatives

One should probably talk about Coco, a dialect of CoffeeScript, and furthermore LiveScript, a fork of Coco. — Preceding unsigned comment added by 82.150.248.29 (talk) 14:12, 25 July 2012 (UTC)[reply]

Example

The example of coffeescript isn't really mind blowing and doesn't show the advantages, disadvantages or construct differences of using CoffeeScript instead of JavaScript. Why not give a simple example of list comprehension or classes? — Preceding unsigned comment added by 81.206.220.44 (talk) 08:20, 2 January 2013 (UTC)[reply]

I agree that it is rather uninformative. CoffeeScript's website is far more informative than Wikipedia, and is actually itself relatively encyclopedic. I would say it is one of the most well documented languages I've seen. The home page has a bias, but it isn't much more significant than that of Wikipedia's Python article. It isn't good enough to copy and paste, though. It would be a fantastic reference to draw a lot of up-to-date information from. impinball (talk) 04:04, 29 July 2014 (UTC)[reply]

CoffeeScript Classes

CoffeeScript is prototype-based, just as JavaScript us (with a one-to-one correlation). It is also class-based, which isn't reflected at all on here. These two examples here are equivalent code.

Prototype-based:

Person = (name, age) -> # Constructor
  @name = name
  @age = age

Person::say = (sentence) -> # Instance method
  console.log "#{@name}: #{sentence}"

Person::sayAge = ->
  @say "My name is #{@name}"

Person::sayAge = ->
  @say "My age is #{@age}"

Person.getName = (person) -> # Static method
  person.name

Person.getAge = (person) ->
  person.age

Class-based:

class Person
  constructor: (name, age, gender) -> # Constructor
    @name = name
    @age = age
    @gender = gender

  say: (sentence) -> # Instance method
    console.log "#{name}: #{sentence}"

  sayName: ->
    @say "My name is #{@name}"

  sayAge: ->
    @say "My age is #{@age}"

  @getName: (person) -> # Static method
    person.name

  @getAge: (person) ->
    person.age

Inheritance is more complete than its common JavaScript counterpart foo.prototype = bar.prototype.

CoffeeScript

class Mother extends Person
  constructor: (info..., children) ->
    super info...
    @children = new Array([children])[0] # convert to Array

  sayChildrenNames: ->
    for child of @children
      [pronoun, relation] = if child.gender is 'male' then ['His', 'son'] else ['Her', 'daughter']
      @say "This is my #{relation} #{child.name}. #{pronoun} age is #{child.age}."

console.log Mother instanceof Person # true

JavaScript

function Mother() {
  var info = Array.prototype.slice.call(arguments);
  var children = info.pop();
  Person.call(this, args);
  this.children = new Array([children])[0]
}

Mother.prototype = Person.prototype;

Mother.prototype.sayChildrenNames = function () {
  var children = this.children;
  for (var i = children.length, child; i-- > 0; ) {
    var child = children[i];
    var pronoun, relation;
    if (child.gender === 'male') {
      pronoun = 'His';
      relation = 'son';
    } else {
      pronoun = 'Her';
      relation = 'daughter';
    }
    this.say('This is my ' + relation + ' ' + child.name + '. ' + pronoun +
             ' age is ' + child.age);
};

console.log(Mother instanceof Person); # false

Could we add a more complete description of classes in CoffeeScript? These specific examples aren't very encyclopedic, but this needs covered.

I would also like to add that it is starting to replace JavaScript. Github no longer has the "any more JavaScript must be written in CoffeeScript" in their guide. That link points to an exclusively CoffeeScript-oriented guide (even though it says "JavaScript" in the navigation bar). impinball (talk) 03:38, 29 July 2014 (UTC)[reply]

Should we remove Dynamic Variables in a Class section?

Not only is the code wrong (no need for the `do (variable) =>` closure). This 'technique' is exactly the same in JavaScript and isn't specific to CoffeeScript at all, I'm not sure I see the relevance. — Preceding unsigned comment added by 60.242.198.15 (talk) 06:30, 20 January 2015 (UTC)[reply]

Yeah, you're right. I almost thought this CoffeeScript is about drinking coffee while writing scripts... 197.129.155.250 (talk) 18:56, 30 January 2015 (UTC)[reply]

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Thank you. The Transhumanist 01:07, 12 April 2017 (UTC)[reply]

External links modified

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"atom is also written in the language" in Adoption

But if you look at the github repository, only 3% of atom is currently written in Coffeescript. AltoStev ^Talk 19:38, 14 May 2021 (UTC)[reply]

Questionable edit

Some of the changes done by ExtabyteWiki have already been reverted or fixed in subsequent edits and 2 other remaining changes should be verified and addressed, if needed:

1) This change to the daily page hits sentence doesn't make any sense:

- By that time the project had attracted several other contributors on GitHub, and was receiving over 300 page hits per day.
+ By that time the project had attracted several other contributors on GitHub and was receiving over 30300-pages per day.

And besides that, traffic information on GitHub is only provided to the repository owner and is not verifiable. This whole sentence about attracting contributors should be removed, because it doesn't provide any real value and if emphasis on popularity is wanted, some other verifiable metrics could be used.

2) This added statement about the project status was false then and is false now:

It's currently unknown if the project will continue or not as it has been not updated for a long time.

This sentence should be removed, because the page is about a Programming language, and programing languages are slow to evolve. The previous release for the language was made 3 months before ExtabyteWiki's edit and there were several changes made to the language in the week before the edit; see this change request that was created one day before the edit and merged 1h and 12m after the edit. — Preceding unsigned comment added by Anodrageduard (talk • contribs) 22:17, 7 April 2022 (UTC)[reply]