我试图写一个函数，大写字符串中每个单词的第一个字母(将字符串转换为标题情况)。
例如，当输入是“我是一个小茶壶”时，我期望“我是一个小茶壶”是输出。然而，该函数返回“i'm a little tea pot”。
这是我的代码:
函数标题案例（str） { var splitStr = str.toLowerCase（）.split（“ ”）; for （var i = 0; i < splitStr.length; i++） { if （splitStr.length[i] < splitStr.length） { splitStr[i].charAt（0）.toUpperCase（）; } str = splitStr.join（“ ”）; } 返回 str; } console.log（titleCase（“I'm a Little Teapot”））;
当前回答
ES6让
const captilizeAllWords = (sentence) => {
if (typeof sentence !== "string") return sentence;
return sentence.split(' ')
.map(word => word.charAt(0).toUpperCase() + word.slice(1))
.join(' ');
}
captilizeAllWords('Something is going on here')
其他回答
ECMAScript 6版本:
title
.split(/ /g).map(word =>
`${word.substring(0,1).toUpperCase()}${word.substring(1)}`)
.join(" ");
ECMA2017或ES8
const titleCase = (string) => { return string .split(' ') .map(word => word.substr(0,1).toUpperCase() + word.substr(1,word.length)) .join(' '); }; let result = titleCase('test test test'); console.log(result); Explanation: 1. First, we pass the string "test test test" to our function "titleCase". 2. We split a string on the space basis so the result of first function "split" will be ["test","test","test"] 3. As we got an array, we used map function for manipulation each word in the array. We capitalize the first character and add remaining character to it. 4. In the last, we join the array using space as we split the string by sapce.
function titleCase(str) {
var myString = str.toLowerCase().split(' ');
for (var i = 0; i < myString.length; i++) {
var subString = myString[i].split('');
for (var j = 0; j < subString.length; j++) {
subString[0] = subString[0].toUpperCase();
}
myString[i] = subString.join('');
}
return myString.join(' ');
}
这里我使用了replace()函数。
function titleCase(str){
return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
}
ES6让
const captilizeAllWords = (sentence) => {
if (typeof sentence !== "string") return sentence;
return sentence.split(' ')
.map(word => word.charAt(0).toUpperCase() + word.slice(1))
.join(' ');
}
captilizeAllWords('Something is going on here')
