Flatten

1 Version

Turns a list-typed stream [element_type] into a stream of its individual elements element_type, emitting one output tick per element. Purely structural: it removes one layer of list nesting and carries the element type through unchanged.

How it fits

Typical backends

Fan a per-element stream out, process each, then regroup by length.

Iterate list elements through a comparison and serialise the matches.

Flatten a list and gate the elements through a boolean filter.

Caveats

Hard constraintThe input must be a list [element_type]; the output stream type is exactly element_type, fixed by the producer of the list, not by this transformation.
I/O contractOutput rate is the list length per input tick, so a single dense list multiplies one tick into many and downstream cadence becomes irregular.
I/O contractAn empty list emits nothing for that tick; a consumer expecting one item per input tick can starve.
OrderingElement order matches list order; elements from a later input list never overtake those of an earlier one.

Versions

f805f308defaultlatestTransformation
7/20/2022