js Curry 函数科里化

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Curry 化是一种将多参数函数转换为单参数函数的技术

function curry(fn){
  return function curried(...args){
    if(args.length >= fn.length){
      return fn.apply(this, args);
    } else {
      return function(...rest){
        return curried.apply(this, args.concat(rest));
      };
    }
  };
}
function add(x, y, z){
  return x + y + z;
}
const curriedAdd = curry(add);
console.log(curriedAdd(1)(2)(3));