Using reduce to realize function chain call in es6

Today, I checked and learned some of the application scenarios of reduce api on the Internet, and also followed the implementation of the code in the Google console. I read an article
requirements: add () (1: add () (2) (3 br 4) (7page8pint 9) () final output / / 34
this function is implemented with reduce! Has anyone given an elegant code

Javascript
Apr.09,2021

this site has a similar answer to

you didn't say the specific rules, according to your example, the parameters for the first call and the last call are empty, so: 

function add(){
  let arr = [];
  return function fn(){
    if(arguments.length>0){
      arr.push(...arguments)
      return fn;
    }
    return arr.reduce((sum,v)=>sum+v);
  }
}

console.log(add()(1,2)(3,4)(7,8,9)())//34
const add = function() {
  let v = 0, 
    f = function(){
    v = [].reduce.call(arguments, (a, b) => a + b, v);
    return arguments.length ? f : v;
  };
  return f
};
console.log(add()(1, 2)(3, 4)(7, 8, 9)())

Previous: Django split by date or size does not take effect

Next: Get the preview of the base64 format of the picture data adjustment background interface plus watermark can not be obtained

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu