How would this be done in Javascript?
strCellID.Replace(Regex.Match(strCellID, @"(?<=_m)\d+(?=_l)").Value, "-");
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1 Answer
That regular expression uses a look-behind assertion and those aren't supported in JavaScript. You could use sub-expression captures to achieve the same result, though:
// $1 references the first captured sub-expression
strCellID.replace(/(_m)\d+(?=_l)/g, "$1-");
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8 Comments
Andy E
@user517406: There's nothing wrong with the syntax, the regex parses just fine. Doesn't seem to work isn't a very good description of a problem. However, I'd guess that you're probably not assigning the result to anything - strings are immutable so
replace() will not change the original string, it will return a new string containing the result instead. If you put a strCellID = in front of the line of code I gave you, it would solve that particular problem. If that's not your problem, you'll need to be more specific. Maybe you could provide some input and expected output samples?
user517406
Thanks, that was the problem I had. If I wanted to do something like this
codenewCellID = newCellID.replace(/(_l)\d+(?=_o)/g, "$1" + msg.d); code would I be able to use the same syntax?Andy E
@user: yeah, there's no reason that wouldn't work (assuming your
msg object is set up correctly).user517406
Tried it and the replace doesn't happen i.e. the string remains in it's original state. I have tried both with msg.d and after converting msg.d to a string
Andy E
@user517406: you'd have to show more code, I'm afraid. If the string returned is the same as the original string it indicates that no matches were found, or the replacement string is exactly the same as the content being replaced. I would check your input string first.
msg.d is converted to a string automatically by the + concatenation operator. |