Javascript：如果冒号，删除最后一个字符

Question

Relative newcomer to Javascript and looking for a way to remove the last character of a string if it is a colon.

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?

Thanks

Answer 1

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:

myString = myString.replace(/^\:/, '');

To match the colon at the end of the string, put $ after the colon instead of ^ before it:

myString = myString.replace(/\:$/, '');

You can also do it using plain string operations:

if (myString.charAt(myString.length - 1) == ':') {
  myString = myString.substr(0, myString.length - 1);
}

Answer 2

try simply with

myString = myString.replace(/:$/, '');

this will remove : when it is at the end of the string

Answer 3

$需要在正则表达式的末尾才能匹配EOL。

/:$/