javascript - 在JavaScript中用下划线替换空格？(Replacing spaces with underscores in JavaScript?)

Question

I'm trying to use this code to replace spaces with _, it works for the first space in the string but all the other instances of spaces remain unchanged.(我正在尝试使用此代码用_替换空格，它适用于字符串中的第一个空格，但所有其他空格实例保持不变。)

Anybody know why?(谁知道为什么？) function updateKey() { var key=$("#title").val(); key=key.replace(" ","_"); $("#url_key").val(key); }   ask by Click Upvote translate from so

Answer 1

Try .replace(/ /g,"_");(试试.replace(/ /g,"_");)

Edit : or .split(' ').join('_') if you have an aversion to REs(编辑 ：或.split(' ').join('_')如果您厌恶RE) Edit : John Resig said :(编辑 ： John Resig说 ：) If you're searching and replacing through a string with a static search and a static replace it's faster to perform the action with .split("match").join("replace") - which seems counter-intuitive but it manages to work that way in most modern browsers.(如果您正在搜索并通过静态搜索替换字符串并使用静态替换，则使用.split（“匹配”）执行操作的速度更快.join（“replace”） - 这看似违反直觉，但它设法工作这种方式在大多数现代浏览器中) (There are changes going in place to grossly improve the performance of .replace(/match/g, "replace") in the next version of Firefox - so the previous statement won't be the case for long.)(（在下一版本的Firefox中，有一些变化可以大大提高.replace（/ match / g，“replace”）的性能 - 所以之前的声明不会长久。）)