froebel/partial.mjs

TypeScript utility library

/**
 * Partially apply a function.
 *
 * @example
 * ```
 * const divide = (dividend: number, divisor: number) => dividend / divisor
 *
 * // (divisor: number) => number
 * const oneOver = partial(divide, 1)
 *
 * // prints: 0.25
 * console.log(oneOver(4))
 * ```
 */
const partial = (fun, ...argsLeft) => (...argsRight) => fun(...argsLeft, ...argsRight);

export default partial;