Default argument and "?" is == not ===

[ssjr]

When I use the default arguments or one ? to check a variable, is compiled into == or !=, not === or !==

eg:

"use strict"

product = (title = "product") ->
  title

item = (title) ->
  if title?
    console.log "title is not null"
  unless title?
    title = "item"
  else
    title.replace /\s+/, '-'
  title

results:

// Generated by CoffeeScript 1.4.0
(function() {
  "use strict";

  var item, product;

  product = function(title) {
    if (title == null) {
      title = "product";
    }
    return title;
  };

  item = function(title) {
    if (title != null) {
      console.log("title is not null");
    }
    if (title == null) {
      title = "item";
    } else {
      title.replace(/\s+/, '-');
    }
    return title;
  };

}).call(this);

"Because the == operator frequently causes undesirable coercion, is intransitive, and has a different meaning than in other languages" - http://coffeescript.org/#operators

[vendethiel]

Because it's checking for null ...

[michaelficarra]

See my comment in #1631 (comment)

[ssjr]

didn't know that. thanks :)