我正在做一個(gè)編碼訓(xùn)練營，我們的目標(biāo)是設(shè)置一個(gè)密碼生成器，用戶可以選擇哪種類型的字符（小寫、大寫、數(shù)字和特殊字符）和長度，并為他們提供一個(gè)隨機(jī)的安全密碼。除了作業(yè)的一個(gè)重要部分，即生成的密碼必須包含用戶選擇的每個(gè)字符外，我能夠使它的所有方面都起作用。它目前是隨機(jī)抓取的，因此如果您選擇所有 4 個(gè)條件，它們將全部出現(xiàn)并不總是保證。我如何驗(yàn)證這一點(diǎn)？const lowCaseArr = "abcdefghijklmnopqrstuvwxyz";const upCaseArr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";const numeralArr = "1234567890";const specialArr = "!@#$%^&*";function getLength() {    while (true) {        var userLength = parseInt(prompt("How many numbers, between 8 and 128, would you like to use? (Enter 0 to cancel)"));        if (userLength == 0) {            return 0;        } else if (userLength > 128 || userLength < 8) {            alert("You must enter a number between 8-128.");        } else if (userLength <= 128 && userLength >= 8) {            alert("Great! Your have selected a password with " + userLength + " characters.");            return userLength;        }    } }function randChar(passwordCharacters) {    return passwordCharacters.charAt(Math.floor(Math.random() * passwordCharacters.length));}function makePassword(userLength, passwordCharacters) {     var securePassword = "";    for (i = 0; i < userLength; i++) {            securePassword += randChar(passwordCharacters);    }    return securePassword;}function generatePassword() {    var userLength = getLength();    if (userLength == 0) {        return "User Cancelled Request";    }    var passwordCharacters = "";    var askLowerCase = confirm("Would you like to include lower case characters? (a, b, c)");    if (askLowerCase !== true) {        alert("Got it. No lower case characters will be included.");    } else {        alert("Great! Your password will include lower case characters!");        passwordCharacters += lowCaseArr;    }