arrayToObject

The arrayToObject function converts an array into an object, using functions to determine the keys and values.

Syntax

arrayToObject<T, K extends PropertyKey>(
  array: T[],
  keyFn?: (item: T, index: number, array: T[]) => K,
  valueFn?: (item: T, index: number, array: T[]) => any
): Record<K, any>;

Parameters

Name	Type	Description
array	T[]	Source array
keyFn	(item: T, index: number, array: T[]) => K	Function to generate keys (optional)
valueFn	(item: T, index: number, array: T[]) => any	Function to generate values (optional)

Returns

Type	Description
Record<K, any>	Resulting object

Examples

arrayToObject(["a", "b"], (item, i) => item, (item, i) => i); // => { a: 0, b: 1 }
arrayToObject([1, 2, 3]); // => { 0: 1, 1: 2, 2: 3 }

Notes

• The keyFn and valueFn functions are optional.
• Useful for transforming arrays into indexed objects.

References

• https://lodash.com/docs/4.17.15#keyBy