How can I convert my List to List<Map<String,dynamic>>? The selected field value will always be false.

List<String> stringList = ["one", "two", "three"];

List<Map<String, dynamic>> mapList = [
 {"name": "one","selected": false},
 {"name": "two","selected": false},
 {"name": "three", "selected": false}];

CodePudding user response：

Do you need something like this?

List<String> stringList = ["one", "two", "three"];
List<Map<String, dynamic>> mapList = [];

stringList.forEach((element) {
  mapList.add({"name": "$element", "selected": false});
});

It will loop the stringList array and take each element and put it in the mapList

CodePudding user response：

Try out this

void main() {
  List<String> stringList = ["one", "two", "three"];

  List<Map<String, dynamic>> mapList = [];

  stringList.forEach((e) {
    Map<String, dynamic> item = {"name": e, "selected": false};
    mapList.add(item);
  });

  print(mapList);
}

output:

[
{name: one, selected: false}, 
{name: two, selected: false}, 
{name: three, selected: false}]

CodePudding user response：

void main() {
List<String> stringList = ["one", "two", "three"];
List<Map<String, dynamic>> mapList = [];

for (var element in stringList) {
mapList.add({"name": element, "selected": false});}

print(mapList);
}

output

[{name: one, selected: false}, 
{name: two, selected: false}, 
{name: three, selected: false}] 

CodePudding user response：

final List<Map<String, dynamic>> mapList = stringList.map(
    (s) => {'name': s, 'selected': false}
).toList();

CodePudding user response：

There are several ways to accomplish this, but I believe the most idiomatic solution would be to use collection for. Effective dart recommends DO use collection literals when possible.

List<Map<String, dynamic>> mapList = [
  for (final element in stringList) 
    {"name": element, "selected": false},
];