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Fuzion • Library Modules • base • Sequence • group_by

group_by

Sequence.group_by

group_by
(K 
type
:
Type, f Unary K T)
 => 
container.Map K (Sequence T)
[src]
group the elements of this sequence by a key of type K
using a mutable_tree_map

f determines the key of an element

Type Parameters

K
[src]
0.095dev (2025-08-15 12:02:22 GIT hash 301b5b75e77076d091b38f555473f9f0e31e5b5c built by fridi@fzen)