zoukankan      html  css  js  c++  java
  • [Javascipt] Immediately-Invoker 2

    Now the people at Poplar Puzzles would like you to treat an array of functions like a Queue, passing the result of each function into the next until the Queue is empty. They’ve sent you the new queue of functions, and a “simple directive”:

    In a variable called applyAndEmpty, build and store a function that takes in a single number and any Queue of functions as inputs and then applies the Queue’s functions in order to the input number, where the results of each function become the next function’s input. Additionally, the queue should be empty following your application. Lastly, because we are just that freaking awesome, any loops you use must only be for-loops. MWAHAHA. Then call your new function using the number 2 and the provided puzzlers queue as initial inputs, and alert the result.- PuZzLe MaSTeRs

    The new Queue of functions to use is below.

    var puzzlers = [
      function ( a ) { return 8*a - 10; },
      function ( a ) { return (a-3) * (a-3) * (a-3); },
      function ( a ) { return a * a + 4; },
      function ( a ) { return a % 5; }
    ];
    

    We’ve provided the queue and the start value for you.

    var puzzlers = [
      function ( a ) { return 8*a - 10; },
      function ( a ) { return (a-3) * (a-3) * (a-3); },
      function ( a ) { return a * a + 4; },
      function ( a ) { return a % 5; }
    ];
    var start = 2;
    var applyAndEmpty = function(num){
      puzzlers.map(function(func){
          var res = func(num);
        num = res;
        alert(res);
            return res;
      });
    };
    applyAndEmpty(start);
    function buildNow(){
      
      return (function(){
        
        alert("RUN NOW");
      })(); // <<---- We add '()', so that as soon as this function return, it will Immediately invoke.
    }
    buildNow();
    
    
    function buildWhenICall(){
      
      return function(){
        
        alert("You call me!");
      };
    }
    
    buildWhenICall()(); // <<--- Or we can do something like that
    // The same as
    //var run = buildWhenICall();
    //run();
    
    
  • 相关阅读:
    Source Insight新建工程文件
    移植3.4.2内核之韦东山笔记
    移植最新u-boot(裁剪和修改默认参数)
    C++与C语言在结构体上的区别
    VIP之Switch
    VIP之CSC
    VIP之Scaler
    VIP之FrameBuffer
    VIP之MixerII
    VIP之Clipper
  • 原文地址:https://www.cnblogs.com/Answer1215/p/3887437.html
Copyright © 2011-2022 走看看