Make an Iterator on values from function calls

Question

Let there is a function foo(): Int. For example, each call foo() returns different values. Just to illustrate:

var i: Int = 0 def foo(): Int = { i += 1 i }

I would like to iterate through these values. Actually, I would like to construct an Iterator it so that each call it.next() computed by foo() called repeatedly. How it can be done?

Luis Miguel Mejía Suárez · Accepted Answer · 2020-05-13 17:22:31Z

4

As I always say, the Scaladoc is your friend.

Iterator.continually(foo())

answered May 13, 2020 at 17:22

Luis Miguel Mejía Suárez

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Comments

user · Accepted Answer · 2020-05-13 17:35:49Z

Luis's answer is better, but here's another way to do it:

new Iterator[Int] { override def hasNext: Boolean = true override def next: Int = foo() }

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