var a = ‘Hi, my name\‘s Han Meimei, a SOFTWARE engineer‘;
 
//for循环
function titleCase(s) {
	var i, ss = s.toLowerCase().split(/\s+/);
	for (i = 0; i < ss.length; i++) {
		ss[i] = ss[i].slice(0, 1).toUpperCase() + ss[i].slice(1);
	}
	return ss.join(‘ ‘);
}
console.log(titleCase(a));

//for循环+replace
function titleCase1(str) {
	//将字符串分解为数组并将其小写化
	var convertToArray = str.toLowerCase().split(" ");
	for (var i = 0; i < convertToArray.length; i++) {
		var char = convertToArray[i].charAt(0);
		//使用 replace()方法将数组中的每个首字母大写化
		convertToArray[i] = convertToArray[i].replace(char, function replace(char) {
			return char.toUpperCase();
		});
	}
	return convertToArray.join(" ");
}
console.log(titleCase1(a));

//正则+replace
function titleCase2(s) {
	return s.toLowerCase().replace(/\b([\w|‘]+)\b/g, function(word) {
		//return word.slice(0, 1).toUpperCase() + word.slice(1);
		return word.replace(word.charAt(0), word.charAt(0).toUpperCase());
	});
}
console.log(titleCase2(a));

//数组+map
function titleCase3(s) {
	return s.toLowerCase().split(/\s+/).map(function(item, index) {
		return item.slice(0, 1).toUpperCase() + item.slice(1);
	}).join(‘ ‘);
}
console.log(titleCase3(a));

//数组+reduce
function titleCase4(s) {
	return s.toLowerCase().split(/\s+/).reduce(function(prev, item, array, array) {
		return prev + (prev.trim() && ‘ ‘) + item.slice(0, 1).toUpperCase() + item.slice(1);
	}, ‘‘);
}
console.log(titleCase4(a));

//ES6写法
function titleCase5(str) {
	return str.toLowerCase().replace(/( |^)[a-z]/g, (L) => L.toUpperCase());
}
console.log(titleCase5(a));