foreach

.foreach iterable:{Iterable<Any>} body:{Lambda} -> Iterable<Any>

Repeats content for each element of an iterable collection. The current element can be accessed via the lambda argument, which may be either explicit or implicit.

.var {collection}
  - A
  - B
  - C

.foreach {.collection}
    element:
    The current element is **.element**

In implicit form:

.foreach {.collection}
    The current element is **.1**

In case the iterable is destructurable (e.g. a dictionary or pair) and the lambda body has more than 1 explicit parameter, the value is destructured into components.

.var {x}
    .dictionary
        - a: 1
        - b: 2
        - c: 3

.foreach {.x}
    key value:
    **.key** has value **.value**

The output is a collection containing the output of each iteration (mapping), so, if used as a value, this function has a meaning similar to map in many languages.

.var {collection}
  - A
  - B
  - C

.var {mappedcollection}
    .foreach {.collection}
        item:
        .item::lowercase

.mappedcollection::first

Output: a

Its content can also be inlined. The previous snippet can be simplified as follows:

.foreach {.collection} {item: .item::lowercase}::first

Parameters