list - how to filter the text string and make a new string in flutter

Question

I want to make a new String after splitting the existing String and searching it through all the Lists existing. The only elements which exist in the the Lists should make the New String. Below is the code in flutter. I am able to break the existing String into List of elements and now I want to search all splitted elements whether they exist in the predefined lists or not. Only those elements which exist in the predefined lists should be used to make the new String

Please guide me how can I do this.

  List A = ["ra", "rb", "rc", "rd", "re"];
  List B = ["rf", "ra", "rh", "ri", "rj"];
  List C = ["k", "l", "m", "of", "o"];
  List D = ["p", "q", "r", "s", "a"];
  List E = ["a", "9", "5", "u", "z"];

String text = "h a s q ra rc";
    List newText =  text.toLowerCase()
        .split(' ')                       // split the text into an array
        .map((String text) => Text(text)) // put the text inside a widget
        .toList();

question from:https://stackoverflow.com/questions/65858108/how-to-filter-the-text-string-and-make-a-new-string-in-flutter

Answer 1

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