Type Alias IsKeyedList<L>

IsKeyedList: L extends readonly any[]
    ? false
    : L extends ReadonlyMap<any, any>
        ? true
        : L extends Map<any, any>
            ? true
            : L extends Record<any, any> ? true : false

Test whether a list-like structure is keyed.

Type Parameters

L
List-like type

Remarks

Returns true for records and maps, false otherwise.

Example

type A = IsKeyedList< Record< string, number > >;  // true
type B = IsKeyedList< Map< number, string > >;     // true
type C = IsKeyedList< number[] >;                  // false

Type Alias IsKeyedList<L>

Type Parameters

Remarks

Example

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