Add reduce
iterables utility
This commit is contained in:
parent
7cf7b1fca5
commit
4495a1ac67
3 changed files with 33 additions and 2 deletions
|
@ -155,6 +155,18 @@ class MapIterator<T, ResultT> implements Iterator<ResultT> {
|
|||
}
|
||||
}
|
||||
|
||||
export function reduce<T, TResult>(
|
||||
iterable: Iterable<T>,
|
||||
fn: (result: TResult, value: T) => TResult,
|
||||
accumulator: TResult
|
||||
): TResult {
|
||||
let result = accumulator;
|
||||
for (const value of iterable) {
|
||||
result = fn(result, value);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
export function take<T>(iterable: Iterable<T>, amount: number): Iterable<T> {
|
||||
return new TakeIterable(iterable, amount);
|
||||
}
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue