javascript - 我遇到错误，由于某种原因，数字被更改，而不是名称？

Question

这是我需要帮助的问题。

我需要随机更改名称。我还需要两个选择的名称相同。

如果您注意到，两个随机名称可能相同。我犯了一些错误，我需要解决这个问题，以便第一个和第二个名字是唯一的。我想将生成的第一个名称传递给第二个名称的 getoption 函数，以便第二个名称不能是这个名称。这就是我遇到的问题，有人可以帮助我吗？

到目前为止，我已经有了更改数字的代码，但我不确定如何随机化名称

 function getrandomnumber(min, max, notin) {
   return min + Math.floor((max - min + 1) * Math.random())
 }

 function getoption(s, ch, num) {
   var a = s.split(ch);
   return a[num - 1];
 }

 var marymoney = getrandomnumber(50, 100, "");
 var johnmoney = getrandomnumber(50, 100, "");
 var maryitem = getrandomnumber(5, 20, "");
 var johnitem = getrandomnumber(5, 20, "");
 var marystuff = getoption("notebook,pencil,ruler,pen,eraser,binder,backpack", ",", getrandomnumber(1, 7));
 var johnstuff = getoption("notebook,pencil,ruler,pen,eraser,binder,backpack", ",", getrandomnumber(1, 7));
 var totalleft = marymoney + johnmoney - maryitem - johnitem;
 var str = "Mary had $" + marymoney + " and John had $" + johnmoney + ".          Mary buys a " + marystuff + " for $" + maryitem + " and John buys a " + +"            for $" + johnitem + ". They have $" + totalleft + ".";

 document.write(str);

Answer 1

试试这个，它对我有用:

function getrandomnumber(min, max, notin) {
    return min + Math.floor((max - min + 1) * Math.random())
}

function getoptions(s, ch) {
    var a = s.split(ch);
    a.sort( function() { return 0.5 - Math.random() } );

    return a;
}

var marymoney = getrandomnumber(50, 100, "");
var johnmoney = getrandomnumber(50, 100, "");

var maryitem = getrandomnumber(5, 20, "");
var johnitem = getrandomnumber(5, 20, "");

var stuff = "notebook,pencil,ruler,pen,eraser,binder,backpack";
var options = getoptions(stuff, ',');

var marystuff = options[0];
var johnstuff = options[1];

var totalleft = marymoney + johnmoney - maryitem - johnitem;

var str = "Mary had $" + marymoney + " and John had $" + johnmoney +
        ".          Mary buys a " + marystuff + " for $" + maryitem +
        " and John buys a " + johnstuff + "            for $" + johnitem +
        ". They have $" + totalleft + ".";

document.write(str);