用两个字符分隔字符串

Question

Firstable i want to match if a string has the following format: $abc #xyz or $abc .xyz .

The abc and xyz mean only alphanumeric string.

If it's matched then i need to extract the first $abc and the last #xyz , all that using pure javascript and maybe regex.

The pattern is in the following order:

1. Dollar Sign
2. Unlimited alphanumeric string
3. space
4. a hash or point
5. Unlimited alphanumeric string

Thanks in advance for any help.

Answer 1

Try the following regular expression:

/^(\$[a-zA-Z\d]+) ([#.][a-zA-Z\d]+)$/

Explanation:

^              Start of line.
(              Start capturing group.
\$             Literal dollar sign.
[a-zA-Z\d]     Any letter in a-z or A-Z, or any digit.
+              One or more of the previous.
)              End capturing group.
<space>        Literal space.
(              Start second capturing group.
[#.]           Either a number sign or a period.
[a-zA-Z\d]+ 
)              End second capturing group.
$              End of line.

Example usage:

> var s = '$abc #xyz';
> s.match(/^(\$[a-zA-Z\d]+) ([#.][a-zA-Z\d]+)$/);
["$abc #xyz", "$abc", "#xyz"]

Answer 2

Like this?

if(str.match(/^\$[a-z0-9]+ (#|\.)[a-z0-9]+$/i)) {
    var parts = str.split(' ');
}

Update: Obviously there a various ways to achieve this. There is not the one regular expression. If you make use of capture groups, you can extract the strings even in one step ( like Mark showed in his answer ).