javascript的柯里化是什么_它如何实现函数转换？

function curry(fn) {
  return function curried(...args) {
    if (args.length >= fn.length) {
      return fn.apply(this, args);
    } else {
      return function(...nextArgs) {
        return curried.apply(this, args.concat(nextArgs));
      };
    }
  };
}
</font>
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<font color="#666">
<pre class="brush:php;toolbar:false;">
const add = (a, b, c) => a + b + c;
const curriedAdd = curry(add);
console.log(curriedAdd(1)(2)(3)); // 6
console.log(curriedAdd(1, 2)(3)); // 6
console.log(curriedAdd(1)(2, 3)); // 6