Javascript 如何将循环开关放入阵列中？
我有一个开关，有提示，询问数据库的事情。如何将不同的案例添加到我拥有的数组中？我有5个数组，但我不知道将什么作为输入放入其中，因为我使用了一个循环作为提示Javascript 如何将循环开关放入阵列中？,javascript,arrays,loops,Javascript,Arrays,Loops,我有一个开关，有提示，询问数据库的事情。如何将不同的案例添加到我拥有的数组中？我有5个数组，但我不知道将什么作为输入放入其中，因为我使用了一个循环作为提示 <html> <head> <title>Nested For</title> <input type="button" value="Start" onclick="Input()"> <script type="text/ja
<html>
<head>
<title>Nested For</title>
<input type="button" value="Start" onclick="Input()">
<script type="text/javascript">
function Input()
for (var i = 1; i < 5; i++) {
for (var b = 0; b <5; i++) {
switch(var b) {
case 1:
contacts[var i] [var b]=prompt ("What is the first name of Customer " + var i + "?";)
break;
case 2:
CustomerId[var i] [var b]=prompt ("what is the Customer Id of the Customer " + var i + "?";)
break;
case 3:
Address[var i] [var b]=prompt ("What is the address of the Customer " + var i + "?";)
break;
case 4:
City[var i] [var b]=prompt ("What is the city that the customer lives in " + var i + "?";)
break;
case 5:
Age[var i] [var b]=prompt ("What is the age of the Cusotmer " + var i + "?";)
break;
}
var database = new Array();
database[0] = new Array();
database[0][0] =
database[0][1] =
database[0][2] =
database[0][3] =
database[0][4] =
database[1] = new Array();
database[1][0] =
database[1][1] =
database[1][2] =
database[1][3] =
database[1][4] =
database[2] = new Array();
database[2][0] =
database[2][1] =
database[2][2] =
database[2][3] =
database[2][4] =
database[3] = new Array();
database[3][0] =
database[3][1] =
database[3][2] =
database[3][3] =
database[3][4] =
database[4] = new Array();
database[4][0] =
database[4][1] =
database[4][2] =
database[4][3] =
database[4][4] =
txtLabel1.value = database[0][0]
txtLabel2.value = database[0][1]
txtLabel3.value = database[0][2]
txtLabel4.value = database[0][3]
txtLabel5.value = database[0][4]
txtLabel6.value = database[1][0]
txtLabel7.value = database[1][1]
txtLabel8.value = database[1][2]
txtLabel9.value = database[1][3]
txtLabel10.value = database[1][4]
txtLabel11.value = database[2][0]
txtLabel12.value = database[2][1]
txtLabel13.value = database[2][2]
txtLabel14.value = database[2][3]
txtLabel15.value = database[2][4]
txtLabel16.value = database[3][0]
txtLabel17.value = database[3][1]
txtLabel18.value = database[3][2]
txtLabel19.value = database[3][3]
txtLabel20.value = database[3][4]
txtLabel21.value = database[4][0]
txtLabel22.value = database[4][1]
txtLabel23.value = database[4][2]
txtLabel24.value = database[4][3]
txtLabel25.value = database[4][4]
}
</script>
<table name="OutputTable">
<tr>
<td>
Name: <input type="text" name="txtLabel1" id="txtLabel1">
</td>
<td>
<input type="text" name="txtLabel2" id="txtLabel2">
</td>
<td>
<input type="text" name="txtLabel3" id="txtLabel3">
</td>
<td>
<input type="text" name="txtLabel4" id="txtLabel4">
</td>
<td>
<input type="text" name="txtLabel5" id="txtLabel5">
</td>
</tr>
<tr>
<td>
Customer Id: <input type="text" name="txtLabel6" id="txtLabel6">
</td>
<td>
<input type="text" name="txtLabel7" id="txtLabel7">
</td>
<td>
<input type="text" name="txtLabel8" id="txtLabel8">
</td>
<td>
<input type="text" name="txtLabel9" id="txtLabel9">
</td>
<td>
<input type="text" name="txtLabel10" id="txtLabel10">
</td>
</tr>
<tr>
<td>
Address: <input type="text" name="txtLabel11" id="txtLabel11">
</td>
<td>
<input type="text" name="txtLabel12" id="txtLabel12">
</td>
<td>
<input type="text" name="txtLabel13" id="txtLabel13">
</td>
<td>
<input type="text" name="txtLabel14" id="txtLabel14">
</td>
<td>
<input type="text" name="txtLabel15" id="txtLabel15">
</td>
</tr>
<tr>
<td>
City: <input type="text" name="txtLabel16" id="txtLabel16">
</td>
<td>
<input type="text" name="txtLabel17" id="txtLabel17">
</td>
<td>
<input type="text" name="txtLabel18" id="txtLabel18">
</td>
<td>
<input type="text" name="txtLabel19" id="txtLabel19">
</td>
<td>
<input type="text" name="txtLabel20" id="txtLabel20">
</td>
</tr>
<tr>
<td>
Age: <input type="text" name="txtLabel21" id="txtLabel21">
</td>
<td>
<input type="text" name="txtLabel22" id="txtLabel22">
</td>
<td>
<input type="text" name="txtLabel23" id="txtLabel23">
</td>
<td>
<input type="text" name="txtLabel24" id="txtLabel24">
</td>
<td>
<input type="text" name="txtLabel25" id="txtLabel25">
</td>
</tr>
</table>
</body>
</html>
嵌套的
函数输入（）
对于（变量i=1；i<5；i++）{
对于（var b=0；b而言，直接访问数据库
数组可能比使用中间数组更简单。您可以大大简化代码：
<script type="text/javascript">
function Input() {
var database = new Array();
for (var i = 1; i <= 5; i++) {
database[i] = new Array();
for (var b = 1; b <= 5; b++) {
switch (b) {
case 1:
database[i][b] = prompt("What is the first name of Customer " + i + "?")
break;
case 2:
database[i][b] = prompt("what is the Customer Id of the Customer " + i + "?")
break;
case 3:
database[i][b] = prompt("What is the address of the Customer " + i + "?")
break;
case 4:
database[i][b] = prompt("What is the city that the customer lives in " + i + "?")
break;
case 5:
database[i][b] = prompt("What is the age of the Cusotmer " + i + "?")
break;
}
}
}
txtLabel1.value = database[0][0]
txtLabel2.value = database[0][1]
txtLabel3.value = database[0][2]
txtLabel4.value = database[0][3]
txtLabel5.value = database[0][4]
txtLabel6.value = database[1][0]
txtLabel7.value = database[1][1]
txtLabel8.value = database[1][2]
txtLabel9.value = database[1][3]
txtLabel10.value = database[1][4]
txtLabel11.value = database[2][0]
txtLabel12.value = database[2][1]
txtLabel13.value = database[2][2]
txtLabel14.value = database[2][3]
txtLabel15.value = database[2][4]
txtLabel16.value = database[3][0]
txtLabel17.value = database[3][1]
txtLabel18.value = database[3][2]
txtLabel19.value = database[3][3]
txtLabel20.value = database[3][4]
txtLabel21.value = database[4][0]
txtLabel22.value = database[4][1]
txtLabel23.value = database[4][2]
txtLabel24.value = database[4][3]
txtLabel25.value = database[4][4]
}
</script>
工作示例：一旦你用var
声明了一些东西，即var i
你就不需要再用var i
引用它了，只要i
就足够了。在你的代码的第一部分，它给了我一个意外的标记var，并在你的案例2中突出显示了开关var带，j来自哪里？Hi@VisilyRomani，很抱歉，我在代码中发现了一些拼写错误。传统模式是使用I
和j
进行嵌套循环，在将其转换为I
和b
时，我未能将j
中的一个更改为ab
。我还发现有些分号不合适，并且您在第一个循环中分配了文本框，而它本应在第一个循环之外。请查看我更新的答案。我还添加了一个工作示例：另外，正如@a.Lau所提到的，在其中的一些地方，您在定义变量之后，使用var
对变量进行了“重新定义”。
<script type="text/javascript">
function Input() {
var database = new Array();
for (var i = 1; i <= 5; i++) {
database[i] = new Array();
for (var b = 1; b <= 5; b++) {
switch (b) {
case 1:
database[i][b] = prompt("What is the first name of Customer " + i + "?")
break;
case 2:
database[i][b] = prompt("what is the Customer Id of the Customer " + i + "?")
break;
case 3:
database[i][b] = prompt("What is the address of the Customer " + i + "?")
break;
case 4:
database[i][b] = prompt("What is the city that the customer lives in " + i + "?")
break;
case 5:
database[i][b] = prompt("What is the age of the Cusotmer " + i + "?")
break;
}
}
}
var labelCursor = 1;
for (var i in database) {
for (var b in database[i]) {
document.getElementById('txtLabel' + labelCursor).value = database[i][b];
labelCursor++;
}
}
}
</script>