如果（几个）替代品之一 [英] if (one of several) alternatives
问题描述
我有一些代码需要知道int变量是否是几个
可能值中的一个。
什么是更好的方法来执行测试比堆叠一堆案例：
在switch语句中？我也不想在
和if语句中有一堆逻辑OR（例如，if（someInt == 25 || someInt == 18 || someInt ==
87 ....）
有什么建议吗？
谢谢！
I have some code that needs to know if an int variable is one of several
possible values.
What is a better way of performing the test than stacking a bunch of case:
in a switch statement? I also don''t want to have a bunch of logical ORs in
an if() statement (e.g., if (someInt == 25 || someInt == 18 || someInt ==
87....)
Any suggestions?
Thanks!
推荐答案
你好！
怎么样 ：
switch（ someInt）
{
案例25：
案例18：
案例87：
...
案例129：
{
...在这里工作
休息; < br $>
}
}
使可读性更高，我认为性能更好
更好，但也许有人可以对此有所了解？实际上，我认为
我会尝试将IL代码与if语句进行比较..
-
venlig hilsen /关心
anders borum
-
Hello!
What about:
switch (someInt)
{
case 25:
case 18:
case 87:
...
case 129:
{
... do work here
break;
}
}
Makes for a much higher readability, and I would think the performance is
better but perhaps someone could cast some light on this? Actually, I think
I''ll try to compare the IL code to an "if" statement ..
--
venlig hilsen / with regards
anders borum
--
RC写道：
我有一些需要知道int变量是否是几个可能值中的一个的代码。
执行测试比堆叠大量案例更好的方法是：
转换声明？我也不想在一个if（）语句中有一堆逻辑OR（例如，if（someInt == 25 || someInt == 18 || someInt ==
87）。 ......）
有什么建议吗？
I have some code that needs to know if an int variable is one of several
possible values.
What is a better way of performing the test than stacking a bunch of case:
in a switch statement? I also don''t want to have a bunch of logical ORs in
an if() statement (e.g., if (someInt == 25 || someInt == 18 || someInt ==
87....)
Any suggestions?
我喜欢开关中堆叠的盒子。有很多创意方法
你可以做到这一点。这是一个，只是为了好玩：
int [] vals = {25,18,87};
int someInt = 25;
bool found = false;
if（（（System.Collections.IList）vals）.Contains（someInt））
found = true;
-
Tom Porterfield
I like the stacked case in a switch. There are lots of creative ways
you could do this. Here''s one, just for fun:
int [] vals = {25,18,87};
int someInt = 25;
bool found = false;
if (((System.Collections.IList)vals).Contains(someInt ))
found = true;
--
Tom Porterfield
>什么是更好的方式执行测试而不是堆叠一堆case：
> What is a better way of performing the test than stacking a bunch of case:
在switch语句中？我也不想在if（）语句中有一堆逻辑OR（例如，if（someInt == 25 || someInt == 18 || someInt ==
87 ....）
in a switch statement? I also don''t want to have a bunch of logical ORs in
an if() statement (e.g., if (someInt == 25 || someInt == 18 || someInt ==
87....)
为什么不呢？ if ... then ... else if else，else if ... sequen ce，这些
是C＃语言为你提供的技巧。
在你梦想的编程语言中，语法是什么样的？
好奇，
Tom Dacon
Dacon软件咨询
Why not? Short of an if ... then ... else if ... else if... sequence, these
are the techniques that the C# language syntax offers you.
In the programming language of your dreams, what would the syntax look like?
Just curious,
Tom Dacon
Dacon Software Consulting
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