CODEWITHSUNDEEP
stringflutterrandom
sebi
sebi

Reputation: 35

Flutter how to generate random strings

Hello does anyone know how I can only generate Strings with letters. Like :

"skdnjfsd" or "bdfvkjnd" ?

my current code :

String _randomString(int length) {
    var rand = new Random();
    var codeUnits = new List.generate(
        length,
            (index){
          return rand.nextInt(33)+89;
        }
    );

    return new String.fromCharCodes(codeUnits);
  }

Upvotes: 3

Views: 5320

Answers (2)

Michael Štekrt
Michael Štekrt

Reputation: 404

implement to your code this function

String getRandom(int length){
    const ch = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz';
    Random r = Random();
    return String.fromCharCodes(Iterable.generate(
    length, (_) => ch.codeUnitAt(r.nextInt(ch.length))));
}

and after call it with length

the original answer : How to generate random string in dart?

Upvotes: 3

Bruno J.
Bruno J.

Reputation: 272

As per the answer of @julemand101, you can do this:

import 'dart:math';

void main() {
  print(getRandomString(5));  // 5GKjb
  print(getRandomString(10)); // LZrJOTBNGA
  print(getRandomString(15)); // PqokAO1BQBHyJVK
}

const _chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';
Random _rnd = Random();

String getRandomString(int length) => String.fromCharCodes(Iterable.generate(
    length, (_) => _chars.codeUnitAt(_rnd.nextInt(_chars.length))));```

Upvotes: 2

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