feat: added 03_dom

02_advanced/uebungen/u28_password-generator/index.js

@@ -0,0 +1,54 @@
+// const crypto = require('node:crypto');
+import crypto from 'node:crypto';
+import _ from 'lodash';
+
+const PASSWORD_LENGTH = 10;
+const s = '23456789abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ!.,;#$%/+*';
+
+const buf = crypto.randomBytes(PASSWORD_LENGTH);
+
+console.log(buf, Array.from(buf));
+
+const password = Array.from(buf)
+  .map((byte) => s.charAt(byte % s.length))
+  .join('');
+
+const getPassword = (amount = 10) => {
+  const chars = '23456789abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ!.,;#$%/+*'.split('');
+  return _.shuffle(chars).slice(0, amount).join('');
+};
+
+console.log(password);
+console.log(getPassword());
+
+// Source - https://stackoverflow.com/a/2450976
+// Posted by ChristopheD, modified by community. See post 'Timeline' for change history
+// Retrieved 2026-07-10, License - CC BY-SA 4.0
+
+function shuffle(array) {
+  let currentIndex = array.length;
+
+  // While there remain elements to shuffle...
+  while (currentIndex != 0) {
+    // Pick a remaining element...
+    let randomIndex = Math.floor(Math.random() * currentIndex);
+    currentIndex--;
+
+    // And swap it with the current element.
+    [array[currentIndex], array[randomIndex]] = [array[randomIndex], array[currentIndex]];
+  }
+  return array;
+}
+
+// Used like so
+let arr = [2, 11, 37, 42];
+shuffle(arr);
+console.log(arr);
+
+// Übung 28: Passwortgenerator
+
+// Was macht der folgende Code?
+
+// OK: Der Titel verrät es schon. Versuche dennoch, das Programm zu verstehen! Benutze die Dokumentation der Standardbibliothek, um nachzuschlagen, was crypto.randomBytes(…) genau macht!
+
+// Bonusfrage: Warum sind in den Zeichen «1», «i» und «l» nicht enthalten, genau so wenig wie «0» und «o»?