[英]Linq query a string array in c# if contains either of two values?
I have an array of strings 我有一个字符串数组
string[] tmp = foo();
If NONE of the strings in foo contain either "bar" or "baz" I want to execute some code. 如果foo中的所有字符串都不包含“ bar”或“ baz”,我想执行一些代码。 Is this the proper way to query this object?
这是查询此对象的正确方法吗?
if(!tmp.Any(p => p.ToLower().Contains("bar") || p.ToLower().Contains("baz"))
doSomething();
The || || seems silly.
看起来很傻。 Should I be using a regular expression here or is there an even better way to be doing this?
我应该在这里使用正则表达式,还是有更好的方法呢? ***Also note the values in tmp are like
"bar=someValue"
like a query string. ***还请注意,tmp中的值类似于
"bar=someValue"
如查询字符串。 This code works ok but I'm certain it can written better. 这段代码可以正常工作,但是我敢肯定它可以写得更好。 Thanks for any tips of feedback.
感谢您提供任何反馈提示。
Any better? 好点? I don't know but should work.
我不知道,但应该可以。
if(!tmp.Select(x => x.Split('=')[0])
.Intersect(new[] { "foo", "baz" },
StringComparer.InvariantCultureIgnoreCase).Any())
doSomething();
You can use nested Any
with StringComparison
overload of IndexOf
: 您可以使用嵌套的
Any
与IndexOf
StringComparison
重载:
string[] source = { "hi=there", "hello=world", "foo=bar" };
string[] exclude = { "baz", "bar" };
if (!source.Any(src =>
exclude.Any(exl =>
src.IndexOf(exl, StringComparison.InvariantCultureIgnoreCase) >= 0)))
doSomething();
Or packaged as an extension method: 或打包为扩展方法:
public static class StringExtensions {
public static bool ContainsAny(
this IEnumerable<string> source,
IEnumerable<string> target,
StringComparison comparisonType = StringComparison.InvariantCultureIgnoreCase) {
return source.Any(xsource => target.Any(
xtarget => xsource.IndexOf(xtarget, comparisonType) >= 0));
}
}
// Later ...
if (!source.ContainsAny(exclude))
doSomething();
I don't think there is anything wrong with your existing code; 我认为您现有的代码没有任何问题; though it could be slightly modified to avoid an extra
ToLower()
call: 尽管可以稍加修改以避免额外的
ToLower()
调用:
var exists = tmp.Any(p =>
{
var s = p.ToLower();
return s.Contains("bar") || s.Contains("baz");
});
if(!exists) doSomething();
If your search terms can be numerous, something like this might work better: 如果您的搜索字词可能很多,那么类似的方法可能会更好:
var terms = new string[] {"bar", "baz", "foo", "boo", ...};
var exists = tmp.Any(p => terms.Any(t => p.ToLower().Contains(t)));
if(!exists) doSomething();
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