How can I generate an array of DataColumn in one single line?
<DataColumn>[
DataColumn(label: Text('A')),
DataColumn(label: Text('B')),
DataColumn(label: Text('C')),
DataColumn(label: Text('D')),
]
Such as:
list<DataColumn>.gen(['A','B','C','D'], (string) => DataColumn(label: Text(string)));
You can use List.generate() like is:
List<String> stringList = ['ACTIVE', 'MODE', 'SEMI', 'AUTO'];
Colum(children: List.generate(stringList.length, (int index) => DataColumn(label: Text(stringList[index])));
List.generate already generates a List, so .toList() wouldn't be necessary.
stringList to be declared as static const. In fact most IDEs will prompt you to do just that.stringList is declared at class scope. static doesn't make sense if it's a top-level variable or a local variable.final. I am suggesting this because this answer will be read in the future by others and should be using best practices.You can use Iterable.map:
var columns = ['A', 'B','C', 'D'].map((s) => DataColumn(label: Text(s))).toList();
or collection-for, which is slightly shorter:
var columns = [for (var s in ['A', 'B', 'C', 'D']) DataColumn(label: Text(s))];
I just found the solution, but two lines.
var titles = ['A', 'B', 'C', 'D'];
List.generate(titles.length,(index) => DataColumn(label: Text(titles[index])));
titles should be declared as static const not var.