freeCodeCamp/guide/chinese/certifications/javascript-algorithms-and-d.../functional-programming/learn-about-functional-prog.../index.md

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Learn About Functional Programming 了解功能编程

了解功能编程

函数有一个输入或参数const myFunc = (input) => { ...code to execute... } 。在这种情况下,输入是要创建多少杯茶。

方法

只需更改一行代码即可传递此问题。必须调用getTea()函数并将其存储在tea4TeamFCC变量中。确保通读getTea()函数并准确理解它的作用。该函数接受一个变量 - numOfCups 。首先制作一个teaCups[]数组并设置一个for循环来倒数传入函数的杯数。然后通过for循环的每次迭代将一杯新茶推入阵列。

从而产生一个阵列,其中包含最初传递给getTea()函数的大量茶杯。

/** 
 * A long process to prepare tea. 
 * @return {string} A cup of tea. 
 **/ 
 const prepareTea = () => 'greenTea'; 
 
 /** 
 * Get given number of cups of tea. 
 * @param {number} numOfCups Number of required cups of tea. 
 * @return {Array<string>} Given amount of tea cups. 
 **/ 
 const getTea = (numOfCups) => { 
  const teaCups = []; 
 
  for(let cups = 1; cups <= numOfCups; cups += 1) { 
    const teaCup = prepareTea(); 
    teaCups.push(teaCup); 
  } 
 
  return teaCups; 
 }; 
 
 // Add your code below this line 
 
 const tea4TeamFCC = getTea(40); // :( 
 
 // Add your code above this line 
 
 console.log(tea4TeamFCC);