我想生成一个符合以下格式的随机密码:
我想到了这一点,我唯一能想到的是一些长而丑的功能。你们能为我提供一种更简单,更有效的方法吗?
PS:我在客户端使用此功能,但在服务器端,在我的Node.js Web应用程序上。
答案 0 :(得分:2)
这是我的解决方案:
/**
* sets of charachters
*/
var upper = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
var lower = 'abcdefghijklmnopqrstuvwxyz'
var digit = '0123456789'
var all = upper + lower + digit
/**
* generate random integer not greater than `max`
*/
function rand (max) {
return Math.floor(Math.random() * max)
}
/**
* generate random character of the given `set`
*/
function random (set) {
return set[rand(set.length - 1)]
}
/**
* generate an array with the given `length`
* of characters of the given `set`
*/
function generate (length, set) {
var result = []
while (length--) result.push(random(set))
return result
}
/**
* shuffle an array randomly
*/
function shuffle (arr) {
var result = []
while (arr.length) {
result = result.concat(arr.splice(rand[arr.length - 1]))
}
return result
}
/**
* do the job
*/
function password (length) {
var result = [] // we need to ensure we have some characters
result = result.concat(generate(1, upper)) // 1 upper case
result = result.concat(generate(1, lower)) // 1 lower case
result = result.concat(generate(1, digit)) // 1 digit
result = result.concat(generate(length - 3, all)) // remaining - whatever
return shuffle(result).join('') // shuffle and make a string
}
console.log(password(6))
答案 1 :(得分:-1)
我们如何将格式放入字符串中,然后我们可以将其放入数组中,然后随机选择一个并在该子数组项中随机选择和项目:
var uppers = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var lowers = "abcdefghijklmnopqrstuvwxyz";
var digits = "01234567890";
var all = uppers + lowers + digits;
var choices = [uppers,lowers,digits];
var checks = [];
var password = "";
var ranLength = Math.ceil(Math.random()*10)+3;
for(var i=0; i<ranLength; i++){
var choice = choices[Math.ceil(Math.random()*3)-1];
var choiceItem = choice[Math.ceil(Math.random()*(choice.length))-1]
password += choiceItem;
}
for(var i=0; i<3; i++){ // Append needed values to end
var choice = choices[i];
var choiceItem = choice[Math.ceil(Math.random()*(choice.length))-1]
password += choiceItem;
}
password = password.split('').sort(function(){
return 0.5 - Math.random();
}).join('');
alert(password);
编辑:抱歉犯了一个小错误。固定的。
答案 2 :(得分:-2)
试试这个......
var randomstring = Math.random().toString(36).slice(-8);