我目前正在为一个类的任务，我需要构建数组的数组来生成一个程序，允许用户输入他/她的名字和出生日期。我的代码如下，
// global array
var globalNameArray = [];
//setting up variablrd
//DOB Conversion
var getAge = function (dateString) {
var today = new Date();
var birthDate = new Date(dateString);
var age = today.getFullYear() - birthDate.getFullYear();
var m = today.getMonth() - birthDate.getMonth();
if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {
age--;
};
return age;
};
var initialize = function () {
"use strict";
// list of all objects being used in functions
var paraRef, name, DOB, sum, mean, count,age, meanRef, sumRef, countRef, nameAndDOB, tempArray = [], i;
//connecting the elements to the html page
paraRef = document.getElementById('displayNumbers');
name = document.getElementById('name').value;
DOB = document.getElementById('DOB').value;
meanRef = document.getElementById('mean');
sumRef = document.getElementById('sum');
countRef = document.getElementById('count');
age = getAge(DOB);
//arrays - name and DOB Array
nameAndDOB = [];
// array with what information going into it
nameAndDOB = [ name, DOB];
// pushing the names array into the global array
globalNameArray.push(nameAndDOB);
count = globalNameArray.length;
countRef.innerHTML = count;
// for loop for temp array getting the inputs and adding it to the global
/*sum = 0;
for (i = 0; i < count; i += 1) {
tempArray = [];
tempArray = globalNameArray[i];
sum += (tempArray[1]);
}*/
paraRef.innerHTML += name;
paraRef.innerHTML += " ";
paraRef.innerHTML += DOB;
paraRef.innerHTML += "<br>";
//showing the values
sumRef.innerHTML = sum;
meanRef.innerHTML = mean;
};
我似乎不能显示用户的转换年龄，也不能显示所有年龄的平均值和总和，有人知道我能做什么吗?
不确定您的问题是否与计算或在HTML中插入值有关，但您的循环是一个良好的开始:
nameAndDOB = {"name":name, "DOB": DOB}; // i use an object but an array is fine too.
globalNameArray.push(nameAndDOB);
var sum = 0;
for (i = 0; i < count; i++) {
sum += getAge(globalNameArray[i].DOB);
}
var mean = (sum / count).toFixed(2);
//showing the values
sumRef.innerHTML = sum;
meanRef.innerHTML = mean;
简述如下，编写程序输入一系列姓名和相关的出生日期(yyy-mm-dd)，并将它们放入数组的数组中。姓名、出生日期和年龄可以每行显示一个，后面是计数、总年龄和平均年龄。
用户一次输入一个名称和关联的DoB。姓名和出生日期存储在数组的数组中。可以显示所有姓名、出生日期和年龄的列表，每行显示一个，后面是计数、年龄总和和平均年龄。注意:alert命令不能用于显示数据，prompt命令不能用于输入数据。{html代码)
<!DOCTYPE html>
<html>
<head>
<title> PSP01</title>
<script type="text/javascript" src="psp1.js">
</script>
</head>
<body>
<h2>PSP01 Assignment</h2>
<p>
Enter a name and a DOB to add to the array
</p>
<form action="#">
<table border="1">
<tr>
<td style = "text-align:right;">Name:</td>
<td>
<input id ="name" type="text" />
</td>
<td rowspan="2">
<input type="button" id="submit" value="submit" />
</td>
</tr>
<tr>
<td style = "text-align:right;">DOB:</td>
<td>
<input id="DOB" type="date" />
</td>
</tr>
<br />
<br>
</br>
<table border="1">
<tr>
<td style = "text-align:right;">Age:</td>
<td id="Age" style="width:100px"> </td>
<td style = "text-align:right;">count:</td>
<td id="count" style="width:100px"> </td>
<td style = "text-align:right;">Sum:</td>
<td id="sum" style="width:100px"> </td>
<td style="text-align:right;">Mean:</td>
<td id="mean" style="width:100px"> </td>
</tr>
</table>
</form>
<p id="displayNumbers"> </p>
<script>
//add an event listener to the submit button
document.getElementById("submit").addEventListener('click', initialize, false);
</script>
</body>
</html>