How do I sort a string list using regular expressions in dart?

Question

I'm essentially looking for another way to sort a string list besides the.sort() Using that for my purpose gives me type '_SecItem' is not a subtype of type 'Comparable<dynamic>' I'm trying to sort a string list by the numerical numbers in front of the strings. Something like:

List<String> hi = ['05stack', '03overflow', '01cool','04is', '02uToo'];

to this:

['01cool', '02uToo', '03overflow', '04is', '05stack']

Answer 1

I can sort easily using sort().

var List<String> hi = ['05stack', '03overflow', '01cool', '04is', '02uToo'];
  hi.sort();
  hi.forEach((element) {
    print(element);
  });

it prints:

01cool
02uToo
03overflow
04is
05stack

I am not getting any error of

type '_SecItem' is not a subtype of type 'Comparable<dynamic>'

Answer 2

With a function to extract the number like

int extractNumber(String srt){
  RegExp regex = new RegExp(r"(\d+)");
  return regex.allMatches(srt).toList().map((m){
    return srt.substring(m.start, m.end);
  }).toList().map((v)=>int.parse(v)).first;
}

void main(){
  List<String> test = ['05stack', '03overflow', '01cool','04is', '02uToo'];
  test.sort((a, b)=>extractNumber(a)>extractNumber(b) ? 1 : -1);
  print(test);
}