Creating implementation for idiom 317 : Random string

Idiom

# 317 Random string

Created by

Lead paragraph

Create a string s of n characters having uniform random values out of the 62 alphanumeric values A-Z, a-z, 0-9

New implementation

Language

Imports

Code

Documentation URL

Original attribution URL

Online runnable demo

Username

Be concise.

Be useful.

All contributions dictatorially edited by webmasters to match personal tastes.

Please do not paste any copyright violating material.

Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations

import "math/rand"

const alphanum = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"

func randomString(n int) string {
	a := make([]byte, n)
	for i := range a {
		a[i] = alphanum[rand.Intn(len(alphanum))]
	}
	return string(a)
}

Demo

import "math/rand"

const alphanum = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"

func randomString(n int, rng *rand.Rand) string {
	a := make([]byte, n)
	for i := range a {
		a[i] = alphanum[rng.Intn(len(alphanum))]
	}
	return string(a)
}

Demo

import "math/rand"

var alphanum = []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")

func randomString(n int, rng *rand.Rand) string {
	a := make([]rune, n)
	for i := range a {
		a[i] = alphanum[rng.Intn(len(alphanum))]
	}
	return string(a)
}

Demo

const s = ((n) => {
    const alphanum = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    let s = "";
    for (let i = 0; i < n; i += 1) {
        s += alphanum[~~(Math.random() * alphanum.length)];
    }
    return s;
})(n);

import java.util.Random;

public static String generateValues(int n)
{
	String alphabet1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	String alphabet2 = "abcdefghijklmnopqrstuvwxyz";
	String digits = "0123456789";
	String values = alphabet1 + alphabet2 + digits;
		
	Random random = new Random(1);
	String s = "";
	for(int count = 0; count < n; count++) {
		s += String.valueOf(values.charAt(random.nextInt(values.length())));
	}
	
	return s;
}

function RandomString(Size: Integer): String;
const
  Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  Len = Length(Chars);
var
  i: Integer;
begin
  Result := '';
  SetLength(Result, Size);
  for i := 1 to Size do
  begin
    Result[i] := Chars[Random(Len)+1];
  end;
end;

my @chars = ('A'..'Z', 'a'..'z', '0'..'9'); 
my $s=''; 
$s .= $chars[int rand @chars] for 1..$n;

import random
import string

alphanum = string.ascii_letters + string.digits
s = ''.join(random.choices(alphanum, k=n))

require 'securerandom'

s = SecureRandom.alphanumeric(n)

Demo
Doc

use rand::distributions::Alphanumeric;
use rand::Rng;

fn random_string(n: usize) -> String {
    rand::thread_rng()
        .sample_iter(Alphanumeric)
        .take(n)
        .map(char::from)
        .collect()
}

Demo
Doc

use rand::distributions::{Alphanumeric, DistString};

fn random_string(n: usize) -> String {
    Alphanumeric.sample_string(&mut rand::thread_rng(), n)
}

Preview