JavaScript's Array class now has forEach(), map() and filter().
We also don't write so much CoffeeScript anymore.
Working with lists in Javascript is painful because the native Array class is so poorly designed.
One way to reduce the pain is to to use
Underscore.js
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'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
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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)
Posted by Henning Koch to makandra dev (2013-09-28 16:46)