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Home > @apextoaster/js-utils > getHeadOrDefault
getHeadOrDefault() function
Get the first element from the specified key, within a map of lists, or a default value when the key does not exist or is nil.
Signature:
export declare function getHeadOrDefault<TKey, TVal>(map: Map<TKey, ReadonlyArray<Maybe<TVal>>>, key: TKey, defaultValue: TVal): TVal;
Parameters
| Parameter | Type | Description |
|---|---|---|
| map | Map<TKey, ReadonlyArray<Maybe<TVal>>> | |
| key | TKey | |
| defaultValue | TVal |
Returns:
TVal