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December 12, 2015 00:58
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Bad random password generator
(Must be at least 8 characters, contain at least one uppercase letter, one lowercase letter, one number and one symbol.)
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| <!DOCTYPE html> | |
| <a href='://bl.ocks.org/4687301'>bl.ocks.org/4687301</a> | |
| <button id='another'>Another one</button> | |
| <span id='password'></span> | |
| <script> | |
| // return random integer in [0,n-1] | |
| function r(n) { | |
| return Math.floor(n * Math.random()); | |
| } | |
| // return random index from array | |
| function rr(a) { | |
| return r(a.length); | |
| } | |
| // return random item from array | |
| function rrr(a) { | |
| return a[rr(a)]; | |
| } | |
| // generate a bad random password | |
| function bad_random_password() { | |
| var N = 8; | |
| var X = [ | |
| 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split(''), | |
| 'abcdefghijklmnopqrstuvwxyz'.split(''), | |
| '0123456789'.split(''), | |
| //'~!@#$%^&*()_+`-={}|[]\\:";\'<>?,./'.split(''), | |
| '$%&*@#!_:~'.split(''), | |
| ]; | |
| var s = ''; | |
| var i = N; | |
| var used = X.map(function(){return false;}); | |
| while (i > 0) { | |
| var which = rr(X); | |
| var chars = X[which]; | |
| s += rrr(chars); | |
| i--; | |
| if (used[which] && i < X.length) { | |
| X.splice(which,1); | |
| used.splice(which,1); | |
| } else { | |
| used[which] = true; | |
| } | |
| } | |
| return s; | |
| } | |
| (function () { | |
| var x = document.getElementById('password'); | |
| var a = document.getElementById('another'); | |
| a.onclick = function() { | |
| x.textContent = bad_random_password(); | |
| }; | |
| a.click(); | |
| })(); | |
| </script> |
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