flatten
Function
flatten
takes a list and replaces any elements that are lists with a
flattened sequence of the list contents.
Examples
> flatten([["a", "b"], [], ["c"]])
["a", "b", "c"]
If any of the nested lists also contain directly-nested lists, these too are flattened recursively:
> flatten([[["a", "b"], []], ["c"]])
["a", "b", "c"]
Indirectly-nested lists, such as those in maps, are not flattened.
Related Functions
-
setproduct
finds all of the combinations of multiple lists or sets of values, which can also be useful when preparing collections for use withfor_each
constructs.