对象内的嵌套数组，使用For循环进行搜索，产生未定义的结果
对象内的嵌套数组，使用For循环进行搜索，产生未定义的结果
提问于 2019-06-21 04:47:34
我已经编辑上传完整的代码，以便在任何浏览器中运行。我在这里得到的只是空格，但我正在寻找1-80 (其中有82,160个组合)中每组3个数字的组合，并希望它输出所有这些结果的数组。然而，目前，数组是空的，但是如果我使用包含jQuery的原始代码，它只给出最后一个值，78,79和80，反复82160次。它给我提供了正确的值数量，但它没有正确填充这些值。
<!doctype html>
<html>
<head>
<title>Keno Tracker v2</title>
<meta charset="utf-8" />
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style type="text/css">
body {
background-color: #f0f0f2;
margin: 0;
padding: 0;
font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
div {
margin: 0em auto;
padding: 00px;
background-color: #fff;
border-radius: 0em;
}
a:link, a:visited {
color: #38488f;
text-decoration: none;
}
@media (max-width: 700px) {
body {
background-color: #fff;
}
div {
width: auto;
margin: 0 auto;
border-radius: 0;
padding: 0em;
}
}
</style>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<div class="mypanel" style="" id="Heading">Last Draw Result</div>
<div class="mypanel" style="all: unset" id="draw"></div><br>
<div class="mypanel" style="all: unset" id="numbs"></div><br>
<div class="mypanel" style="all: unset" id="bon"></div><br>
<div class="mypanel" style="" id="MostDue">Most Overdue Pairs</div>
<div class="mypanel" style="all: unset" id="mosdu"></div><br>
<div class="mypanel" style="" id="MostFreq">Most Frequent Pairs</div>
<div class="mypanel" style="all: unset" id="mosfq"></div><br>
<div class="mypanel" style="display:none" id="test"></div><br>
<div class="mypanel" style="display:none" id="test2"></div><br>
<script type=text/javascript>
var results = new Object();
results.Num = [12354, 12353, 12352, 12351, 12350, 12349, 12348, 12347, 12346, 12345]
results.Picks = [[1, 2, 4, 6, 8, 9, 13, 15, 38, 39, 22, 25, 65, 44, 66, 75, 80, 34, 12, 77], [5, 2, 4, 38, 39, 7, 8, 9, 18, 14, 23, 25, 65, 44, 66, 75, 80, 34, 12, 77], [1, 2, 3, 7, 9, 10, 14, 15, 26, 21, 63, 41, 67, 71, 38, 39, 79, 32, 17, 72], [11, 12, 14, 16, 18, 19, 13, 15, 26, 27, 61, 43, 62, 72, 79, 38, 39, 37, 10, 74], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77], [2, 3, 5, 7, 9, 10, 14, 16, 23, 26, 67, 45, 66, 76, 1, 38, 39, 35, 13, 78], [10, 22, 19, 1, 8, 9, 37, 4, 11, 5, 20, 14, 3, 35, 38, 39, 41, 74, 57, 61], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77]]
results.Bonus = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
var Totals = new Array();
var temp = new Object();
var drawsdone = 0
var Totsdone = 0
var displayd = 0
function getdraws() {
var results = new Object()
results.Num = [12354, 12353, 12352, 12351, 12350, 12349, 12348, 12347, 12346, 12345]
results.Picks = [[1, 2, 4, 6, 8, 9, 13, 15, 38, 39, 22, 25, 65, 44, 66, 75, 80, 34, 12, 77], [5, 2, 4, 38, 39, 7, 8, 9, 18, 14, 23, 25, 65, 44, 66, 75, 80, 34, 12, 77], [1, 2, 3, 7, 9, 10, 14, 15, 26, 21, 63, 41, 67, 71, 38, 39, 79, 32, 17, 72], [11, 12, 14, 16, 18, 19, 13, 15, 26, 27, 61, 43, 62, 72, 79, 38, 39, 37, 10, 74], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77], [2, 3, 5, 7, 9, 10, 14, 16, 23, 26, 67, 45, 66, 76, 1, 38, 39, 35, 13, 78], [10, 22, 19, 1, 8, 9, 37, 4, 11, 5, 20, 14, 3, 35, 38, 39, 41, 74, 57, 61], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77], [1, 2, 4, 6, 8, 9, 13, 15, 22, 25, 65, 44, 66, 75, 80, 38, 39, 34, 12, 77]]
results.Bonus = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
window.drawsdone = 1
}
function getTotals() {
if (Totsdone == 0){
for (a=1;a<81;a++){
for (b=1;b<81;b++){
if (a<b){
for (c=1;c<81;c++){
if (b<c){
temp.n1 = 0
temp.n2 = 0
temp.n3 = 0
temp.fq123 = 0
temp.sin123 = 0
temp.fq12 = 0
temp.sin12 = 0
temp.fq13 = 0
temp.sin13 = 0
temp.fq23 = 0
temp.sin23 = 0
temp.fq1 = 0
temp.sin1 = 0
temp.fq2 = 0
temp.sin2 = 0
temp.fq3 = 0
temp.sin3 = 0
for (i in results.Picks){
if (results.Picks[i].includes(a)){
if (results.Picks[i].includes(b)){
if (results.Picks[i].includes(c)){
if (temp.sin123 == 0){
temp.sin123 = results.Num[0]-results.Num[i]
}
temp.fq123++
temp.n1=a
temp.n2=b
temp.n3=c
}
}
}
}
Totals.push(temp)
}
}
}
}
}
window.Totsdone = 1
}
}
function display(){
if (displayd == 0){
console.log(Totals)
Totals = new Array()
window.displayd = 1
}
}
getdraws();
setInterval(function(){
getTotals()},2000)
setInterval(function(){
display()},3000)
</script>
</body>
</html>回答 1
Stack Overflow用户
回答已采纳
发布于 2019-06-21 05:00:04
因为您的for循环有一个硬编码的第二个条件i<20，而您的Picks数组只有10个项目，例如，从第11个项目开始，您将获得undefined...
编辑:根据更新的问题更新答案。
仍然不确定您的代码的整个逻辑，但是关于
我正在寻找从1到80(其中有82,160个组合)中以3为一组的每一个数字组合，我希望它输出所有这些结果的数组。
我认为这可能是一个更优雅的解决方案：
function* generateDraws(pool, size) {
if (size < 1) {
yield [];
} else {
for (let i = size; i <= pool; i++) {
for (let tail of generateDraws(i - 1, size - 1)) {
tail.push(i);
yield tail;
}
}
}
}
let draws = [];
for (let draw of generateDraws(80, 3)) {
draws.push(draw);
}
console.log(draws.length);
//console.log(draws); // will not work in stackoverflow snippet runner, does in the browser though!
在处理像这样的大迭代时(如你所说，它有82160个组合，例如80!/(3!(80-3)!)，事情可能会变得相当慢，所以使用生成器函数似乎是最合适的，因为它将以恒定的内存使用量运行。
还要注意，生成器函数是现代的JS，所以如果你实际上需要在客户端运行这段代码，而你的用户使用的是旧浏览器，你需要先用babel或typescript转换它，或者在服务器端生成绘图并从服务器获取它们。
希望它至少能有一点帮助！
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/56693660
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