Javascript：如果是冒号，则删除最后一个字符
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Javascript: Remove last character if a colon
提问by neil
Relative newcomer to Javascript and looking for a way to remove the last character of a string if it is a colon.
Javascript 的相对新手，正在寻找一种方法来删除字符串的最后一个字符（如果它是冒号）。
I know myString = myString.replace('/^\\:/');will work for the start of the line but not sure how to swap in the $character to change to the end of a line… can anybody correct it?
我知道myString = myString.replace('/^\\:/');行的开头会起作用，但不确定如何交换$字符以更改到行的末尾……有人可以更正吗？
Thanks
谢谢
回答by Guffa
The regular expression literal (/.../) should not be in a string. Correcting your code for removing the colon at the beginning of the string, you get:
正则表达式文字 ( /.../) 不应在字符串中。更正用于删除字符串开头的冒号的代码，您将得到：
myString = myString.replace(/^\:/, '');
To match the colon at the end of the string, put $after the colon instead of ^before it:
要匹配字符串末尾的冒号，请将其放在$冒号之后而不是^之前：
myString = myString.replace(/\:$/, '');
You can also do it using plain string operations:
您也可以使用纯字符串操作来实现：
if (myString.charAt(myString.length - 1) == ':') {
myString = myString.substr(0, myString.length - 1);
}
回答by Fabrizio Calderan
try simply with
简单地尝试
myString = myString.replace(/:$/, '');
this will remove :when it is at the end of the string
这将:在它位于字符串末尾时删除
回答by Ben Taber
$needs to be at the end of the regex to match EOL.
$需要在正则表达式的末尾以匹配 EOL。
/:$/
/:$/
