generator_pass_code.js

genpass.js

let rand = function (str) {
    return str[Math.floor (Math.random () * str.length)];
  };

let get = function (source, len, a) {
    for (var i = 0; i < len; i++)
      a.push (rand (source));
    return a;
  };

let alpha  = function (len, a) {
    return get ("A1BCD2EFG3HIJ4KLM5NOP6QRS7TUV8WXY9Z", len, a);
  };

let symbol = function (len, a) {
    return get ("-:;_$!", len, a);
  };


let length=50;

// Alpha{ceil((length-1)/2))} Symbol Alpha{floor((length-1)/(2))}
let l = Math.floor (length/2), r = Math.ceil (length/2);
let ret = alpha (l, symbol (1, alpha (r, []))).join('');

console.log(ret)