Time with flutter - flutter

Question

I am totally new with flutter and I do not understand how can I resolve a problem.
I'm actually working to a kart race app and:
I need to read a string like 1:02.456
Convert in some kind of time
Compare with another string similar to first one
Go to do something
es:
blap = null;
if(1:02.456 < 1:03.589){
blap = '1:02.456';
} else {
blap = '1:03.589;
}
I read on the web that I ca use the class DateTime, but every time I try to convert the string in an object of that class, I do not get wat I want.
There is a better way?
Thank you.

Answer 1

If you are working on a kart race app probably you need to use Duration, not DateTime.
This is one way to convert a string like yours into Duration
Duration parseDuration(String s) {
int hours = 0;
int minutes = 0;
int micros;
List<String> parts = s.split(':');
if (parts.length > 2) {
hours = int.parse(parts[parts.length - 3]);
}
if (parts.length > 1) {
minutes = int.parse(parts[parts.length - 2]);
}
micros = (double.parse(parts[parts.length - 1]) * 1000000).round();
return Duration(hours: hours, minutes: minutes, microseconds: micros);
}
Then, to compare two Duration in the way you wanted, this is an example:
String blap;
Duration time1=Duration(hours: 1),time2=Duration(hours: 2);
if(time1.compareTo(time2)<0){
//time2 is greater than time1
blap=time1.toString();
}else{
blap=time2.toString();
}