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Fuzion • Library Modules • base • Sequence • group_map

group_map

Sequence.group_map

group_map
(
K 
type
:
property.orderable,
B 
type
,
M 
type
: container.Map K (Sequence B),
key_f Unary K T,
f Unary B T
)
 => 
M
[src]
group the elements of this sequence by a key of type and applies function f to all elements

example: group characters by category and add underscores around each character

What are effects?

=> {(digit => [_1_, _4_]), (letter => [_A_, _b_, _X_]), (other => [_?_])}

Type Parameters

K
:
property.orderable
[src]
type of the keys
B
:
Any
[src]
type of the values in the result
M
:
container.Map K (Sequence B)
[src]
the type of the map to create

Arguments

key_f
 Unary K T
[src]
function to generate the keys
f
 Unary B T
[src]
function applied to each element
0.099dev (GIT hash bf4ead724d7f3fdab43a87b63c17477c916c8995)
last changed: 2026-11-04