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How to generate unique short ids

mathiasgodwin answered on August 20, 2024 Popularity 3/10 Helpfulness 1/10

answer How to generate unique short ids

How to generate unique short ids

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/// Java version (check below for Dart version)
public void TestRandomIdGenerator()
{
    // create five IDs of six, base 62 characters
    for (int i=0; i<5; i++) Console.WriteLine(RandomIdGenerator.GetBase62(6));

    // create five IDs of eight base 36 characters
    for (int i=0; i<5; i++) Console.WriteLine(RandomIdGenerator.GetBase36(8));
}

public static class RandomIdGenerator 
{
    private static char[] _base62chars = 
        "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
        .ToCharArray();

    private static Random _random = new Random();

    public static string GetBase62(int length) 
    {
        var sb = new StringBuilder(length);

        for (int i=0; i<length; i++) 
            sb.Append(_base62chars[_random.Next(62)]);

        return sb.ToString();
    }       

    public static string GetBase36(int length) 
    {
        var sb = new StringBuilder(length);

        for (int i=0; i<length; i++) 
            sb.Append(_base62chars[_random.Next(36)]);

        return sb.ToString();
    }
}


/// Dart version
import 'dart:math';

void testRandomIdGenerator() {
  // create five IDs of six base 62 characters
  for (int i = 0; i < 5; i++) {
    print(RandomIdGenerator.getBase62(6));
  }

  // create five IDs of eight base 36 characters
  for (int i = 0; i < 5; i++) {
    print(RandomIdGenerator.getBase36(8));
  }
}

class RandomIdGenerator {
  static  List<String> _base62chars =
      '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');

  static final Random _random = Random();

  static String getBase62(int length) {
    final StringBuffer sb = StringBuffer();
    for (int i = 0; i < length; i++) {
      sb.write(_base62chars[_random.nextInt(62)]);
    }
    return sb.toString();
  }

  static String getBase36(int length) {
    final StringBuffer sb = StringBuffer();
    for (int i = 0; i < length; i++) {
      sb.write(_base62chars[_random.nextInt(36)]);
    }
    return sb.toString();
  }
}

void main() {
  testRandomIdGenerator();
}

Popularity 3/10 Helpfulness 1/10 Language java

Source: stackoverflow.com

Tags: generate ids java short unique

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Contributed on Aug 20 2024

mathiasgodwin

0 Answers Avg Quality 2/10

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