给定一个这样的字符串:
"The dog has a long tail, and it is RED!"
什么样的jQuery或JavaScript魔法可以用来保持空间只有一个最大空间?
目标:
"The dog has a long tail, and it is RED!"
当前回答
let nameCorrection = function (str) {
let strPerfect = str.replace(/\s+/g, " ").trim();
let strSmall = strPerfect.toLowerCase();
let arrSmall = strSmall.split(" ");
let arrCapital = [];
for (let x of arrSmall.values()) {
arrCapital.push(x[0].toUpperCase() + x.slice(1));
}
let result = arrCapital.join(" ");
console.log(result);
};
nameCorrection("Pradeep kumar dHital");
其他回答
既然你似乎对性能很感兴趣，我用firebug分析了一下。以下是我得到的结果:
str.replace( / +/g, ' ' ) -> 380ms
str.replace( /\s\s+/g, ' ' ) -> 390ms
str.replace( / {2,}/g, ' ' ) -> 470ms
str.replace( / +/g, ' ' ) -> 790ms
str.replace( / +(?= )/g, ' ') -> 3250ms
这是在Firefox上，运行100k字符串替换。
如果您认为性能是个问题，我鼓励您使用firebug进行自己的分析测试。众所周知，人类不善于预测程序的瓶颈所在。
(另外，请注意，IE 8的开发者工具栏也有内置的分析器——它可能值得检查在IE中的性能是什么样的。)
我知道我迟到了，但我发现了一个很好的解决方案。
下面就是:
var myStr = myStr.replace(/[ ][ ]*/g, ' ');
let nameCorrection = function (str) {
let strPerfect = str.replace(/\s+/g, " ").trim();
let strSmall = strPerfect.toLowerCase();
let arrSmall = strSmall.split(" ");
let arrCapital = [];
for (let x of arrSmall.values()) {
arrCapital.push(x[0].toUpperCase() + x.slice(1));
}
let result = arrCapital.join(" ");
console.log(result);
};
nameCorrection("Pradeep kumar dHital");
更健壮的:
function trim(word)
{
word = word.replace(/[^\x21-\x7E]+/g, ' '); // change non-printing chars to spaces
return word.replace(/^\s+|\s+$/g, ''); // remove leading/trailing spaces
}
尝试用一个空格替换多个空格。
<script type="text/javascript">
var myStr = "The dog has a long tail, and it is RED!";
alert(myStr); // Output 'The dog has a long tail, and it is RED!'
var newStr = myStr.replace(/ +/g, ' ');
alert(newStr); // Output 'The dog has a long tail, and it is RED!'
</script>
阅读更多@用单个空格替换多个空格
