Type Alias MapMultiOpts<V>

type MapMultiOpts<V> = {
groupBy?: (value: V) => string;
}

groupBy?: (value: V) => string

Returns a group for values added via addValue. Eg. maybe you want to group values in the shape {name: 'Samantha' city: 'Copenhagen'} by city:

const opts = {
 groupBy: (v) => v.city
}

Properties