Method chaining with function arguments

javascript syntax coffeescript
nicholaides picture nicholaides · Feb 28, 2011 · Viewed 16.8k times · Source

What's the best way to chain methods in CoffeeScript? For example, if I have this JavaScript how could I write it in CoffeeScript?

var req = $.get('foo.htm')
  .success(function( response ){
    // do something
    // ...
  })
  .error(function(){
    // do something
    // ...
  });

Answer

a paid nerd picture a paid nerd · May 10, 2011

Using the latest CoffeeScript, the following:

req = $.get 'foo.html'
  .success (response) ->
    do_something()
  .error (response) ->
    do_something()

...compiles to:

var req;
req = $.get('foo.html').success(function(response) {
  return do_something();
}).error(function(response) {
  return do_something();
});

Related questions

How do I convert a float number to a whole number in JavaScript?

I'd like to convert a float to a whole number in JavaScript. Actually, I'd like to know how to do BOTH of the standard conversions: by truncating and by rounding. And efficiently, not via converting to a string and parsing.

Read More
What does "use strict" do in JavaScript, and what is the reasoning behind it?

Recently, I ran some of my JavaScript code through Crockford's JSLint, and it gave the following error: Problem at line 1 character 1: Missing "use strict" statement. Doing some searching, I realized that some people add "use strict"; into their JavaScript code. …

Read More
What is the preferred syntax for defining enums in JavaScript?

What is the preferred syntax for defining enums in JavaScript? Something like: my.namespace.ColorEnum = { RED : 0, GREEN : 1, BLUE : 2 } // later on if(currentColor == my.namespace.ColorEnum.RED) { // whatever } Or is there a more preferable idiom?

Read More