Map
Helper functions that have to do with maps.
Functions
Section titled “Functions”mapFilter()
Section titled “mapFilter()”function mapFilter<K, V>(map, predicate): readonly V[];Defined in: functions/map.ts:17
Helper function to get the values in a Map that match an arbitrary condition.
Similar to the Array.map method, but works for maps.
This is efficient such that it avoids converting the map values into an array.
If you want to perform a filter and a map at the same time on an array, use the
filterMap helper function instead.
Type Parameters
Section titled “Type Parameters”| Type Parameter |
|---|
K |
V |
Parameters
Section titled “Parameters”| Parameter | Type |
|---|---|
map |
ReadonlyMap<K, V> |
predicate |
(value) => boolean |
Returns
Section titled “Returns”readonly V[]
mapFind()
Section titled “mapFind()”function mapFind<K, V>(map, predicate): V | undefined;Defined in: functions/map.ts:43
Helper function to find a value in a Map. Similar to the Array.find method,
but works for maps.
This is efficient such that it avoids converting the map values into an array.
Type Parameters
Section titled “Type Parameters”| Type Parameter |
|---|
K |
V |
Parameters
Section titled “Parameters”| Parameter | Type | Description |
|---|---|---|
map |
ReadonlyMap<K, V> |
The map to search through. |
predicate |
(value, key, map) => boolean |
Function that tests each value for a condition. |
Returns
Section titled “Returns”V | undefined
The first value that satisfies the predicate, or undefined if no values satisfy.