currying#

import { currying } from 'funtool';

// 基本用法，收集3个参数后自动执行
const sum = currying({
  fn: (...args) => args.reduce((a, b) => a + b, 0),
  done: args => args.length >= 3
});
sum(1)(2)(3); // 自动执行 → 6

// 手动执行使用value()
const product = currying({
  fn: (...args) => args.reduce((a, b) => a * b, 1)
});
product(2)(3)(4).value(); // → 24

// 链式转换
const result = product(1)(2)(3)
  .map(x => x * 2)
  .filter(x => x > 2)
  .value(); // → 24

function currying<Args extends any[], R>(options: {
  fn: (...args: Args) => R;
  done?: (args: Args) => boolean;
}): CurriedFunction<Args, R>