how to convert Flutter List<List> to List [closed] - flutter

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// Here Is my Code
List data = [[0,1],[0,1],[0,1]];
List requiredList = [1,1,1];

Answer 1

To get the second value of the elements in the first list as second list you can do this:
List requiredList = data.expand((e)=>[e[1]]).toList();

Answer 2

Simply loop through the data and add the item in index 1 into output.
void main() async {
List data = [[0,1],[0,1],[0,1]];
List output = [];
for(final d in data){
output.add(d[1]);
}
print(output);
}
Output:
[1, 1, 1]

Answer 3

Your data contains lists, i.e to access data of list you have to pass index of list, i.e 0 1 2 etc.
List data = [[0,1],[0,1],[0,1]];
^ ^ ^
| | |
0 1 2
Above mentioned are index of each sub-list
So if you want to access data from sub-list, call the main list followed by index of sub-list and index number of elements of sub-list.
data[0][1] //this will give an output of 1
^ ^ ^
|. |. |
*. **. ***
*. => list containing lists here
** => Index of sub-list
*** => index of element in list
Check this video here to get more clarity of concept. I've attached a video related to python but same things apply in dart/flutter as well.