jquery 从随机选择的数组中选择随机值

wnvonmuf 于 2023-06-22 发布在 jQuery

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我是一个绝对的新手，当涉及到JavaScript和JQuery。我正在尝试开发一个系统，可以从数组中选择一组数字。
我有3个数组和一个系统，将从这些数组中选择一个数字。

var selectedArray = ["sixMatched","fiveMatched","fourMatched","threeMatched"];

    var sixMatched = ["367687"];

    var fiveMatched = ["567687","337687","167687","367587","368687"];

    var fourMatched = ["387087","357187","365627","367620","369627","867987","367610","367604","394687","397681","367247","167683","767697","567617","367207"];

    var threeMatched = ["338680","965647","163637","333677","837637","267427","364288","357634","767817","361557","302682","667027","320637","547686","967088","382637","360167","327286","817187","707087","387481","357280","563287","367803","867646","277686","384697","364483","467827","332681"];

我使用math.random函数通过selectedArray数组选择一个随机数组名。
然后我想使用从selectedArray中选择的名称，并使用它从sixMatched，fiveMatched等中选择一个随机值。

$('#play').click(function(){
        var winningArray = selectedArray[Math.floor(Math.random()*selectedArray.length)];
        var winningNumber = winningArray[Math.floor(Math.random()*winningArray.length)];
        
        $('#number').animateNumber({ number: (winningNumber)});
        console.log("Winning array is "+ winningArray +"");
        console.log("Winning number is "+ winningNumber +"");
        return false;   
    });

我的代码所做的是从winningArray中选择一个随机字母，而不是将变量的值视为变量选择器。
我希望，由于winningArray将被设置为例如“sixMatched”，代码将选择sixMatched数组并从中选择一个随机值，但实际上它是从winningArray的值中选择一个随机字母。
有人知道我该怎么解决吗？

jquery

来源：https://stackoverflow.com/questions/76491346/select-random-value-from-a-randomly-selected-array

2条答案

按热度按时间

z3yyvxxp1#

不使用单独的顶级变量，而是将数组属性设置为对象：

var matchedArrays = {
  sixMatched: ["367687"],
  fiveMatched: ["567687","337687","167687","367587","368687"],
  fourMatched: ["387087","357187","365627","367620","369627","867987","367610","367604","394687","397681","367247","167683","767697","567617","367207"],
  threeMatched: ["338680","965647","163637","333677","837637","267427","364288","357634","767817","361557","302682","667027","320637","547686","967088","382637","360167","327286","817187","707087","387481","357280","563287","367803","867646","277686","384697","364483","467827","332681"]
};

然后，您可以使用随机选择的字符串值来引用该对象上的属性：

var winningNumber = matchedArrays[winningArray][Math.floor(Math.random()*matchedArrays[winningArray].length)];

请注意，对winningArray的引用被替换为matchedArrays[winningArray]，因为winningArray本身是一个字符串值，您可以在JavaScript中使用字符串来索引对象属性。
作为一个学术练习，您可以完全摆脱显式的selectedArray和dynamically use the list of properties on the matchedArrays object，因此如果它们发生变化，您不需要手动保持两者同步。

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x7rlezfr2#

您将从selectedArray中获得字符串的随机索引，而不是您要查找的内容。
考虑使用一个带有键和值的Object，那么你只需要pick a random key作为'array name'。
因为它是一个对象，所以你可以很容易地将它的键的值作为目标来获取数组，然后从该数组中获取get a random item：

const allArrays = {
    sixMatched:  ["367687"],
    fiveMatched: ["567687","337687","167687","367587","368687"],
    fourMatched: ["387087","357187","365627","367620","369627","867987","367610","367604","394687","397681","367247","167683","767697","567617","367207"],
    threeMatched:["338680","965647","163637","333677","837637","267427","364288","357634","767817","361557","302682","667027","320637","547686","967088","382637","360167","327286","817187","707087","387481","357280","563287","367803","867646","277686","384697","364483","467827","332681"]
}

const allArrayKeys = Object.keys(allArrays);

var randomArrayKey = allArrayKeys[Math.floor(Math.random()*allArrayKeys.length)];
var randomArray    = allArrays[randomArrayKey]
var winningNumber = randomArray[Math.floor(Math.random()*randomArray.length)];

console.log("Winning array is "+ randomArrayKey +"");
console.log("Winning number is "+ winningNumber +"");

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jquery 从随机选择的数组中选择随机值

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