作业要求

它可以帮我处理一段字符串信息，这段字符串信息是由英文单词组成，每两个单词之间有空格，
处理结果也为一段字符串，这个字符串应该每行只显示一个单词和它的数量，并且按出现频率倒序排列

• input
  it was the age of wisdom it was the age of foolishness it is
• output
  it 3 was 2 the 2 age 2 of 2 wisdom 1 foolishness 1 is 1

思路

流程图.png

代码

main.js

var format = function (word,count){ return word +" "+ count; }; var group = function(wordArray){ return wordArray.reduce((array,word) => { let entry = array.find((e) =>e.word ===word); if(entry){ entry.count++; }else{ array.push({word:word,count:1}); } return array; },[]); }; var split = function(words){ return words.split(/\s+/); }; var sort = function(groupedWords){ groupedWords.sort((s,y)=>y.count - x.count); }; function main(words){ if(words!== ''){ let wordArray = words.split(/\s+/); let groupedWords = group(wordArray); groupedWords.sort((x,y) =>y.count -x.count); return groupedWords.map((e) => format(e.word,e.count)).join('\r\n'); } return ''; } module.exports = main;

TDD.js

var main = require("./main.js"); describe("Word Frequency",function(){ it("returns empty string given empty string",function(){ var result = main(''); expect(result).toEqual(''); }); it("returns string given one word",function(){ var result = main('he'); expect(result).toEqual('he 1'); }); it("returns string given two different words",function(){ var result = main('he is'); expect(result).toEqual('he 1\r\nis 1'); }); it("returns string given duplicated words",function(){ var result = main('he is he'); expect(result).toEqual('he 2\r\nis 1'); }); it("returns string given duplicated words need to be sorted",function(){ var result = main('he is is'); expect(result).toEqual('is 2\r\nhe 1'); }); it("returns string given words splited by multiple spaces",function(){ var result = main('he is'); expect(result).toEqual('he 1\r\nis 1'); }); it("returns string given words splited by multiple spaces",function(){ var result = main('it was the age of wisdom it was the age of foolishness it is'); expect(result).toEqual('it 3\r\nwas 2\r\nthe 2\r\nage 2\r\nof 2\r\nwisdom 1\r\nfoolishness 1\r\nis 1'); }); });

git截图

• 空字符串

  
  
  empty.png
  
  
  git.png

• 一个单词

  
  
  one word.png

• 两个单词

  
  
  two different words.png

• 三个单词

  
  
  three words.png

• 排序

  
  
  sorted.png
  
  
  git.png

• 最终

  
  
  final.png

log日志

log.png

远成仓库

repo.png

总结

• 终于知道git怎么用的了，之前还一脸蒙蔽，然后通过问同学、上网查询......反正就是各种不容易，感谢那些对我的问题很耐心的回答我的同学

• 还有就是远程仓库，最开始弄了好久它都说我那个git push命令有问题

  
  
  push的问题.png

  后面问同学、网上查询才知道什么情况，原来是因为我没有创建SSH keys

  
  
  ssh.png
• 谢谢teamleader和王凶一直耐心的回答我的问题，感动cry......

详情可参考李小波教练的直播

• GitHub远成仓库