Working with lists in Javascript is painful because the native Array class is so poorly designed.

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One way to reduce the pain is to to use Underscore.js Show archive.org snapshot 's functions like _.each, _.map or _.select, which unfortunately clutters your code with awkward calls to the _ helper.

Fortunately when you use CoffeeScript you don't need any of that. CoffeeScript has a very versatile for keyword Show archive.org snapshot that can do anything that each, collect or select can do. Enjoy!

each

for item in items 
  ...

collect / map

ages = (person.age for person in people)

select / grep

adults = (person for person in people when person.age >= 18)