How to add a prefix to every element of a set in Dart?

Question

I initialize a set as

Set ids = {'1','2','3','4','5'};

How can I add a prefix such as ios_ to the set of ids such that the result is

Set ids = {'ios_1','ios_2','ios_3','ios_4','ios_5'};

user_13579714 · Answer

You can use map() :

var result = ids.map((val) => 'ios_$val').toSet();