Necesito que se llame a UsernameFn recursivamente (cc líneas posteriores) hasta que el ciclo condicional dentro del cual se llama se vuelva falso. Si coloco el bucle fuera de la función UsernameFn por completo, la consola dice que el nombre de usuario no está definido, aunque el nombre de usuario var se declare globalmente. ¿Que se supone que haga?
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// dataset for username const alpha = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']; const num = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0']; var counter = 0; var Username; // determine random length of the username var UNlength = Math.random() * 11; UNlength = UNlength.toFixed(0); function UsernameFn() { // generate random nums as pickers var PickerN = Math.random() * 10; PickerN = PickerN.toFixed(0); var PickerA = Math.random() * 26; PickerA = PickerA.toFixed(0); var PickerG = Math.random() * 10; PickerG = PickerG.toFixed(0); // Pickers for the first character in "Username" var PickerUN = Math.random() * 10; PickerUN = PickerUN.toFixed(0); var PickerUA = Math.random() * 26; PickerUA = PickerUA.toFixed(0); var PickerUG = Math.random() * 10; PickerUG = PickerUG.toFixed(0); // choose randomly btw num and alpha. If Math.random // is an even num, option = alpha. If odd num, option = num if (PickerG % 2 == 0) { var Chosen = num[PickerN]; } else { var Chosen = alpha[PickerA]; } if (PickerUG % 2 == 0) { var Username = num[PickerUN]; } else { var Username = alpha[PickerUA]; } //append each new choice to a string of previous choices //when string = UNlength <= 10 chosen ranbdomly above, stop recursion. // 'Username' declaration outside scope to allow loop access Username = String(Username) + String(Chosen); return Username; counter += 1; do { UsernameFn() } while (Username.length <= UNlength.length); }El ciclo debe estar fuera de la función. Luego, debe concatenar el valor devuelto a la variable Username de usuario.
Además, UNlength.length debería ser simplemente UNlength .
// dataset for username const alpha = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']; const num = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0']; var counter = 0; var Username = ''; // determine random length of the username var UNlength = Math.random() * 11; UNlength = UNlength.toFixed(0); do { Username += UsernameFn(); counter++; } while (Username.length <= UNlength); console.log(Username, counter); function UsernameFn() { // generate random nums as pickers var PickerN = Math.random() * 10; PickerN = PickerN.toFixed(0); var PickerA = Math.random() * 26; PickerA = PickerA.toFixed(0); var PickerG = Math.random() * 10; PickerG = PickerG.toFixed(0); // Pickers for the first character in "Username" var PickerUN = Math.random() * 10; PickerUN = PickerUN.toFixed(0); var PickerUA = Math.random() * 26; PickerUA = PickerUA.toFixed(0); var PickerUG = Math.random() * 10; PickerUG = PickerUG.toFixed(0); // choose randomly btw num and alpha. If Math.random // is an even num, option = alpha. If odd num, option = num if (PickerG % 2 == 0) { var Chosen = num[PickerN]; } else { var Chosen = alpha[PickerA]; } if (PickerUG % 2 == 0) { var Username = num[PickerUN]; } else { var Username = alpha[PickerUA]; } //append each new choice to a string of previous choices //when string = UNlength <= 10 chosen ranbdomly above, stop recursion. // 'Username' declaration outside scope to allow loop access Username = String(Username) + String(Chosen); return Username; }