Javascript indexOf 不工作
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Javascript indexOf not working
提问by Darren Cook
The following code looks for the name of a person in a message that they have entered using the indexOf method.
以下代码在他们使用 indexOf 方法输入的消息中查找人员的姓名。
However it is returning the not present result even when the name is present. If I only Darren as the cardMessage it works.
但是，即使名称存在，它也会返回不存在的结果。如果我只将 Darren 作为 cardMessage，它就可以工作。
Can anyone point out what is wrong.
任何人都可以指出什么是错的。
<%
firstName = "Darren"
cardMessage = "Is Darren in the message?"
cardMessage = CleanX(cardMessage)
firstName = UCase(firstName)
cardMessage = UCase(cardMessage)
Function CleanX(strString)
Set regEx = New RegExp
regEx.Pattern = "[^a-z0-9 ]+"
regEx.IgnoreCase = True
regEx.Global = True
CleanX = regEx.Replace(strString, "")
End Function
%>
<p><%=cardMessage%></p>
<p><%=firstName%></p>
<a href="javascript:check_message()">Click Here</a>
<script type="text/javascript">
s1 = new String("<%=firstName%>")
s2 = new String("<%=cardMessage%>")
function check_message()
{
var purchaser=s1;
var purchaser_ok=purchaser.indexOf(s2);
if (purchaser_ok==-1)
{
confirm('Name is NOT in message');
}
else
alert('Name is in message');
}
</script>
采纳答案by Pointy
You're doing it backwards. It should be
你是在倒退。它应该是
var purchaser_ok = s2.indexOf(purchaser);
The ".indexOf()" function checks to see whether the argument you pass into it is in the string that's used as the receiver (the context object; that is, the string before the "." when you call it).
".indexOf()" 函数检查您传递给它的参数是否在用作接收器的字符串中（上下文对象；即，当您调用它时，"." 之前的字符串）。
回答by James Montagne
You have it backwards.
你把它倒过来了。
s2.indexOf(purchaser)
s2.indexOf(purchaser)
