首頁猿問一種檢查字符串是否包含來自特定子字...

一種檢查字符串是否包含來自特定子字符串的字符的方法

JavaScript

GCT1015 2023-03-18 16:39:02

我正在做一個編碼訓練營，我們的目標是設置一個密碼生成器，用戶可以選擇哪種類型的字符（小寫、大寫、數字和特殊字符）和長度，并為他們提供一個隨機的安全密碼。除了作業的一個重要部分，即生成的密碼必須包含用戶選擇的每個字符外，我能夠使它的所有方面都起作用。它目前是隨機抓取的，因此如果您選擇所有 4 個條件，它們將全部出現并不總是保證。我如何驗證這一點？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; }

查看完整描述

1 回答

料青山看我應如是

TA貢獻1772條經驗獲得超8個贊

與其在事后更改密碼，不如通過確保密碼滿足所有約束從一開始就正確生成密碼。

我已經使用了您的代碼片段來生成一個獨立的函數makeSecurePassword()，該函數接受多個參數：userLength, askLowerCase, askUpperCase, askNumerals, askSpecial。它返回請求的密碼userLength，僅包含請求的字符類型。它使用你的randChar()輔助函數。

var securePassword = makeSecurePassword( 10, true, true, true, true );

console.log(securePassword);

// Return a random character from passwordCharacters:

function randChar(passwordCharacters) {

return passwordCharacters.charAt(Math.floor(Math.random() * passwordCharacters.length));

}

function makeSecurePassword( userLength, askLowerCase, askUpperCase, askNumerals, askSpecial ) {

const lowCaseArr = "abcdefghijklmnopqrstuvwxyz";

const upCaseArr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

const numeralArr = "1234567890";

const specialArr = "!@#$%^&*";

var password = [];

// Decide which chars to consider:

charArray = [];

if ( askLowerCase ) {

charArray.push( lowCaseArr );

}

if ( askUpperCase ) {

charArray.push( upCaseArr );

}

if ( askNumerals ) {

charArray.push( numeralArr );

}

if ( askSpecial ) {

charArray.push( specialArr );

}

let x = 0; // index into charArray

for ( var i=0; i < userLength; i++ ) {

var a = charArray[x]; // Which array of chars to look at

// Insert at random spot:

password.splice( password.length, 1, randChar( a ) );

// Pick next set of chars:

if ( ++x >= charArray.length ) {

x = 0; // Start with the first set of chars if we went past the end

}

return password.join(''); // Create a string from the array of random chars

}

反對回復 2023-03-18

1 回答
0 關注
111 瀏覽

關注

添加回答

舉報

0/150

提交

取消

亚洲在线久爱草,狠狠天天香蕉网,天天搞日日干久草,伊人亚洲日本欧美

熱搜

最近搜索清空

一種檢查字符串是否包含來自特定子字符串的字符的方法

一種檢查字符串是否包含來自特定子字符串的字符的方法

1 回答

添加回答