'Flutter Sort list by 3 properties
I have a List with some properties and I would like two sort all of them by three properties. In my list I have number, number2, date and some other properties. When I click on number list sort by number ASC, when I click again on number list sort DESC by number. When I click again on number, do not sort by number. Same for number2 and date. But When I click on number and then on number2, sort by both fields. Same for date
I tried like this but does not work for me.
All fields are ASC order
reports.sort((a, b) => <Comparator<Reports>>[
(o1, o2) => o1.number.compareTo(o2.number),
(o1, o2) => o1.number2.compareTo(o2.number2),
(o1, o2) => o1.date.compareTo(o2.date),
].map((e) => e(a, b)).firstWhere((e) => e != 0, orElse: () => 0));
Number field is DASC order other are ASC order
reports.sort((a, b) => <Comparator<Reports>>[
(o1, o2) => o2.number.compareTo(o1.number),
(o1, o2) => o1.number2.compareTo(o2.number2),
(o1, o2) => o1.date.compareTo(o2.date),
].map((e) => e(a, b)).firstWhere((e) => e != 0, orElse: () => 0));
Tried like this but does not work. If anyone have idea please help.
Sources
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Source: Stack Overflow
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