freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/title-case-a-sentence.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
ab6137d4e35944e21037b769	句中单词首字母大写	5	16088	title-case-a-sentence

--description--

请将传入的字符串中，每个单词的第一个字母变成大写并返回。注意除首字母外，其余的字符都应是小写的。

另外请注意，像是 “the”、“of” 之类的连接词的首字母也要大写。

--hints--

titleCase("I'm a little tea pot") 应返回一个字符串。

assert(typeof titleCase("I'm a little tea pot") === 'string');

titleCase("I'm a little tea pot") 应返回 I'm A Little Tea Pot。

assert(titleCase("I'm a little tea pot") === "I'm A Little Tea Pot");

titleCase("sHoRt AnD sToUt") 应返回 Short And Stout。

assert(titleCase('sHoRt AnD sToUt') === 'Short And Stout');

titleCase("HERE IS MY HANDLE HERE IS MY SPOUT") 应返回 Here Is My Handle Here Is My Spout。

assert(
  titleCase('HERE IS MY HANDLE HERE IS MY SPOUT') ===
    'Here Is My Handle Here Is My Spout'
);

--seed--

--seed-contents--

function titleCase(str) {
  return str;
}

titleCase("I'm a little tea pot");

--solutions--

function titleCase(str) {
  return str.split(' ').map(word => word.charAt(0).toUpperCase() + word.substring(1).toLowerCase()).join(' ');
}

titleCase("I'm a little tea pot");