js-utils/docs/api/js-utils.getheadordefault.md

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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<Optional<TVal>>>, key: TKey, defaultValue: TVal): TVal;

Parameters

Parameter	Type	Description
map	Map<TKey, ReadonlyArray<Optional<TVal>>>
key	TKey
defaultValue	TVal

Returns:

TVal