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internal
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util
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argsArgArrayOrObject.ts
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const { isArray } = Array; const { getPrototypeOf, prototype: objectProto, keys: getKeys } = Object; /** * Used in functions where either a list of arguments, a single array of arguments, or a * dictionary of arguments can be returned. Returns an object with an `args` property with * the arguments in an array, if it is a dictionary, it will also return the `keys` in another * property. */ export function argsArgArrayOrObject<T, O extends Record<string, T>>(args: T[] | [O] | [T[]]): { args: T[]; keys: string[] | null } { if (args.length === 1) { const first = args[0]; if (isArray(first)) { return { args: first, keys: null }; } if (isPOJO(first)) { const keys = getKeys(first); return { args: keys.map((key) => first[key]), keys, }; } } return { args: args as T[], keys: null }; } function isPOJO(obj: any): obj is object { return obj && typeof obj === 'object' && getPrototypeOf(obj) === objectProto; }