Some modern Javascript APIs return iterators Show archive.org snapshot instead of arrays.

Opscomplete powered by

Save money by migrating from AWS to our fully managed hosting in Germany.

• Trusted by over 100 customers
• Ready to use with Ruby, Node.js, PHP
• Proactive management by operations experts

Read more Show archive.org snapshot

In plain Javascript you can loop through an iterator using
for...of Show archive.org snapshot :

var iterator = ...;

for (var value of iterator) {
   console.log(value); 
}

While there is a for...of construct in Coffeescript, it iterates through property/value pairs Show archive.org snapshot and cannot be used to access iterable objects.

To iterate through an iterator in Coffeescript you need to do something like this:

iterator = ...;

while (entry = iterator.next()) && !entry.done
  console.log(entry.value)

The parentheses in the while cannot be omitted.