在Javascript中从数组中删除元素

可能重复：

函数写入（）{
对于（var x=1；x您可以尝试：

question.splice(rnd,1)

将其放在循环的末尾，它将删除刚才显示的元素。
您可以尝试：

question.splice(rnd,1)

将此项放在循环的末尾，它将删除刚刚显示的元素。
您可以跟踪已使用的随机索引并避免这些索引，而不是从数组中删除元素。类似于这样：

function write() {
  for (var x = 1; x <= 3; x++) {
    var question = new Array(...);
    var used={}, l=question.length, rnd;
    do {
      rnd = Math.floor(l * Math.random());
    } while (rnd in used);
    used[rnd] = true;
    document.write(question[rnd]);
    document.write("<br>")
  }
}

function write() {
  var question = ["If you are goofy which is your leading foot", "Riding switch is when you do what", "On your toe side which way should you lean", "question 4", "question 5", "question 6"];

  for (var x = 1; x <= 3; x++) {
    var rnd = Math.floor(question.length * Math.random());
    document.write(question.splice(rnd, 1)[0] + "<br>");
  }
}

函数写入（）{
对于（var x=1；x，您可以跟踪已经使用过的随机索引并避免它们，而不是从数组中删除元素。类似如下：

function write() {
  for (var x = 1; x <= 3; x++) {
    var question = new Array(...);
    var used={}, l=question.length, rnd;
    do {
      rnd = Math.floor(l * Math.random());
    } while (rnd in used);
    used[rnd] = true;
    document.write(question[rnd]);
    document.write("<br>")
  }
}

function write() {
  var question = ["If you are goofy which is your leading foot", "Riding switch is when you do what", "On your toe side which way should you lean", "question 4", "question 5", "question 6"];

  for (var x = 1; x <= 3; x++) {
    var rnd = Math.floor(question.length * Math.random());
    document.write(question.splice(rnd, 1)[0] + "<br>");
  }
}

函数写入（）{
对于（var x=1；x您需要使用数组的方法。但是，您每次迭代都要创建一个新数组，因此您需要将该部分移出循环

function write() {
    var questions = [
        "If you are goofy which is your leading foot",
        "Riding switch is when you do what",
        "On your toe side which way should you lean",
        "question 4",
        "question 5",
        "question 6"
    ];

    for (var x = 1; x <= 3; x++) {
        var rnd = Math.floor(questions.length * Math.random());
        document.write(questions[rnd] + "<br>");
        questions.splice(rnd, 1);
    }
}

函数写入（）{
变量问题=[
“如果你是傻瓜，哪只脚是你的前脚”，
“骑行开关是当你做什么”，
“在你的脚趾侧，你应该向哪个方向倾斜”，
“问题4”，
“问题5”，
“问题6”
];
对于（var x=1；x您需要使用数组的方法。但是，您每次迭代都要创建一个新数组，因此您需要将该部分移出循环

function write() {
    var questions = [
        "If you are goofy which is your leading foot",
        "Riding switch is when you do what",
        "On your toe side which way should you lean",
        "question 4",
        "question 5",
        "question 6"
    ];

    for (var x = 1; x <= 3; x++) {
        var rnd = Math.floor(questions.length * Math.random());
        document.write(questions[rnd] + "<br>");
        questions.splice(rnd, 1);
    }
}

函数写入（）{
变量问题=[
“如果你是傻瓜，哪只脚是你的前脚”，
“骑行开关是当你做什么”，
“在你的脚趾侧，你应该向哪个方向倾斜”，
“问题4”，
“问题5”，
“问题6”
];
对于（var x=1；x我同意Tim的回答。不过，另外，您可以通过这样做进一步压缩代码：

function write() {
  for (var x = 1; x <= 3; x++) {
    var question = new Array(...);
    var used={}, l=question.length, rnd;
    do {
      rnd = Math.floor(l * Math.random());
    } while (rnd in used);
    used[rnd] = true;
    document.write(question[rnd]);
    document.write("<br>")
  }
}

function write() {
  var question = ["If you are goofy which is your leading foot", "Riding switch is when you do what", "On your toe side which way should you lean", "question 4", "question 5", "question 6"];

  for (var x = 1; x <= 3; x++) {
    var rnd = Math.floor(question.length * Math.random());
    document.write(question.splice(rnd, 1)[0] + "<br>");
  }
}

函数写入（）{
var question=[“如果你是傻瓜，哪只脚是你的前脚”，“骑行开关是当你做什么”，“在你的脚趾侧，你应该向哪个方向倾斜”，“问题4”，“问题5”，“问题6”]；
对于（var x=1；x我同意Tim的回答。不过，另外，您可以通过这样做进一步压缩代码：

function write() {
  for (var x = 1; x <= 3; x++) {
    var question = new Array(...);
    var used={}, l=question.length, rnd;
    do {
      rnd = Math.floor(l * Math.random());
    } while (rnd in used);
    used[rnd] = true;
    document.write(question[rnd]);
    document.write("<br>")
  }
}

function write() {
  var question = ["If you are goofy which is your leading foot", "Riding switch is when you do what", "On your toe side which way should you lean", "question 4", "question 5", "question 6"];

  for (var x = 1; x <= 3; x++) {
    var rnd = Math.floor(question.length * Math.random());
    document.write(question.splice(rnd, 1)[0] + "<br>");
  }
}

函数写入（）{
var question=[“如果你是傻瓜，哪只脚是你的前脚”，“骑行开关是当你做什么”，“在你的脚趾侧，你应该向哪个方向倾斜”，“问题4”，“问题5”，“问题6”]；
对于（var x=1；x）如果您非常喜欢编写长行代码，甚至可以将随机数生成移动到拼接函数第一个参数的位置。如果您非常喜欢编写长行代码，甚至可以将随机数生成移动到拼接函数第一个参数的位置。