import { LazyAsync } from "https://deno.land/x/better_iterators@v1.2.1/mod.ts";
Constructors
Methods
Given uniqueKeyFn
, use it to extract a key from each item, and create a
1:1 map from that to each item.
Takes an additional valueFn
to extract a value from T
. The returned
map maps from Key to Value. (instead of Key to T)
Get the first item. Returns defaultValue
if there is no first item.
Given keyFn
, use it to extract a key from each item, and create a Map
grouping items by that key.
Adds a valueFn
to extract that value (instead of T) into a group.
Apply transform
to each element.
Works like Array#map.
Like map, but performs up to max
operations in parallel.
Note: This function will ensure that the order of outputs is the same as the order of the inputs they were mapped from. This can introduce head-of-line blocking, which can slow performance. If you don't need this, use mapParUnordered instead.
A version of mapPar that does not enforce ordering, so doesn't suffer from head-of-line blocking.
Partition items into matches
and others
according to Filter f
.