I came up with these general functions: fun forloop(state: S, condition: (s: S) -> Boolean, postExecution: (s: S) -> Unit, block: (s: S) -> Unit) ')Īlthough, in compliance with the language philosophy, you should only use this in rare circumstances. However, I needed a traditional for loop (like java) with an immediately terminating state scope, exit condition that evaluates before loop-body execution, and a post-execution operation (my use case was complicated: I needed to repeat using a dynamic exit condition based on a compression routine and powers of 2). Third, we’ll look at how to use it in nested loops. Python has for/in form to iterate over elements of containers. Second, we’ll see how to use forEach to iterate over a list. go run foreach.go 5 has index 0 4 has index 1 3 has index 2 2 has index 3 1 has index 4 - de > Germany it > Italy sk > Slovakia - de > Germany it > Italy sk > Slovakia Python foreach. First, we define the data which we’ll use in our examples.

Kotlin is trying to enforce fluent iteration, which covers the vast majority of looping constructs. In this short Kotlin tutorial, we’ll look at the parameter scope inside a forEach loop’s lambda.

Kotlin foreach with index