Question

How to filter elements of a set in Dart

Answer 1

bool isEven(val) {
    if (val % 2 == 0)
        return true;
    else
        return false;
}
  
void main() {
    Set st = {1, 2, 3, 5, 6, 8, 4, 13, 18};
   
    st.retainWhere(isEven);
   
    print(st);
}
 
 
 
 
/*
run:
 
{2, 6, 8, 4, 18}
 
*/

 

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Answer 2

void main() {
    Set st = {1, 2, 3, 5, 6, 8, 4, 13, 18};
  
    st.retainWhere((val) => val % 2 == 0);
  
    print(st);
}




/*
run:

{2, 6, 8, 4, 18}

*/

 

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