Why is this regexp not returning any matches?

Question

I'm using a dart regular expression and trying to find a match. Dart code: http://try.dartlang.org/s/SY1B ``` RegExp exp = const RegExp("/my/i"); String str = "Parse my string"; Iterable<Match> matches = exp.allMatches(str); for (Match m in matches) { String match = m.group(0); print(match); } ``` I'm trying to perform a case-insensitive search to find all matches of a string. It says there are no matches. I'm sure I'm messing up somewhere because I'm new to regexp. How can I modify the code to find the match? For context, I plan to modify the code to search for any string which I think will be achieved with the following code. ``` RegExp exp = const RegExp("/${searchTerm}/i"); ```

Accepted Answer

The /pattern/flags syntax works in JavaScript, but not Dart as Dart doesn't have regex literals. Instead the docs show this:

```
const RegExp(String pattern, [bool multiLine, bool ignoreCase])
```

So your constructor should look like:

```
RegExp exp = const RegExp("my", ignoreCase: true);
```

Why is this regexp not returning any matches?

Solution

Problem