Scala's for-comprehensions: vital feature or syntactic sugar?

Question

When I first started looking at Scala, I liked the look of for-comprehensions. They seemed to be a bit like the foreach loops I was used to from Java 5, but with functional rest

Answer 1

In some cases, for comprehensions can express intent better, so when they do, use them.

Also note that with for comprehensions, you get pattern matching for free. For example, iterating over a Map is much simpler with for comprehension:

for ((key, value) <- map) println (key + "-->" + value)

than with foreach:

map foreach { case (key, value) => println (key + "-->" + value) }