Map BuiltList to BuiltList





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I have a list of strings in BuiltList, and want to convert them to another BuiltList of int values.



final lengths = BuiltList<String>(['a', 'bbbb', 'cdea']).rebuild((b) =>

  b.map((e) => e.length)

);


When using map in the builder, Dart Analysis says "error: The return type 'int' isn't a 'String', as defined by anonymous closure.".



How can I map from String to Int using the built_collection library?






dart







share|improve this question





























    1















    I have a list of strings in BuiltList, and want to convert them to another BuiltList of int values.



    final lengths = BuiltList<String>(['a', 'bbbb', 'cdea']).rebuild((b) =>
    
  b.map((e) => e.length)
    
);


    When using map in the builder, Dart Analysis says "error: The return type 'int' isn't a 'String', as defined by anonymous closure.".



    How can I map from String to Int using the built_collection library?






    dart







    share|improve this question

























      1












      1








      1








      I have a list of strings in BuiltList, and want to convert them to another BuiltList of int values.



      final lengths = BuiltList<String>(['a', 'bbbb', 'cdea']).rebuild((b) =>
      
  b.map((e) => e.length)
      
);


      When using map in the builder, Dart Analysis says "error: The return type 'int' isn't a 'String', as defined by anonymous closure.".



      How can I map from String to Int using the built_collection library?






      dart







      share|improve this question














      I have a list of strings in BuiltList, and want to convert them to another BuiltList of int values.



      final lengths = BuiltList<String>(['a', 'bbbb', 'cdea']).rebuild((b) =>
      
  b.map((e) => e.length)
      
);


      When using map in the builder, Dart Analysis says "error: The return type 'int' isn't a 'String', as defined by anonymous closure.".



      How can I map from String to Int using the built_collection library?






      dart




      dart






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 4 at 0:29









      S.D.S.D.

      2431113




      2431113
























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          rebuild is to update a built value https://pub.dartlang.org/documentation/built_value/latest/built_value/Built/rebuild.html



          You want a different list:



          final strings = BuiltList<String>(['a', 'bbbb', 'cdea']);
          
final lengths = BuiltList<int>(string.map((e) => e.length));





          share|improve this answer
























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            rebuild is to update a built value https://pub.dartlang.org/documentation/built_value/latest/built_value/Built/rebuild.html



            You want a different list:



            final strings = BuiltList<String>(['a', 'bbbb', 'cdea']);
            
final lengths = BuiltList<int>(string.map((e) => e.length));





            share|improve this answer




























              1














              rebuild is to update a built value https://pub.dartlang.org/documentation/built_value/latest/built_value/Built/rebuild.html



              You want a different list:



              final strings = BuiltList<String>(['a', 'bbbb', 'cdea']);
              
final lengths = BuiltList<int>(string.map((e) => e.length));





              share|improve this answer


























                1












                1








                1







                rebuild is to update a built value https://pub.dartlang.org/documentation/built_value/latest/built_value/Built/rebuild.html



                You want a different list:



                final strings = BuiltList<String>(['a', 'bbbb', 'cdea']);
                
final lengths = BuiltList<int>(string.map((e) => e.length));





                share|improve this answer













                rebuild is to update a built value https://pub.dartlang.org/documentation/built_value/latest/built_value/Built/rebuild.html



                You want a different list:



                final strings = BuiltList<String>(['a', 'bbbb', 'cdea']);
                
final lengths = BuiltList<int>(string.map((e) => e.length));






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 4 at 6:46









                Günter ZöchbauerGünter Zöchbauer

                336k721027951




                336k721027951
































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