How can i add an entry to a specific index in a list?

Question

I can call list.add() which adds at the end but there is no convenient way to add an entry to a specific index which at the same time grows the list.

Answer 1

You can use the insert() and removeAt() methods now.

Answer 2

You can use insertRange, it will grow the list when adding new elements.

var list = ["1","3","4"];
list.insertRange(0, 1, "0");
list.insertRange(2, 1, "2");
list.forEach((e) => print(e));

You can try it out on the DartBoard here

Answer 3

Dart 2

var idx = 3;
list.insert(idx, 'foo');

Depends on whether you want to insert a single item or a bunch of items

• https://api.dartlang.org/stable/2.1.0/dart-core/List/insert.html
• https://api.dartlang.org/stable/2.1.0/dart-core/List/insertAll.html

All available methods https://api.dartlang.org/stable/2.1.0/dart-core/List-class.html#instance-methods

Answer 4

Ok, it seams as if list.insertRange(index, range, [elem]) is what i am looking for.