Question

我的代码忽略了用户输入的常用词：

string[] ignored_words = { "the", "and", "I" };

String[] words = UserInput.Split(' ');
foreach (string word in words)
{
    if (!ignored_words.Any(word.Equals))
    {
        // perform actions on desired words only
    }
}

这很有效，除非案例错误（＆＃34; THE＆＃34;因为用户输入不会被＆＃34;＆＃34;被忽略的词）。< / p>

如何在等于比较中添加IgnoreCase clause？

Answer 1

if (!ignored_words.Any(w => w.Equals(word, StringComparison.CurrentCultureIgnoreCase)))
{
   // ...
}

或与null值无关的静态String.Equals：

if (!ignored_words.Any(w => string.Equals(w, word, StringComparison.CurrentCultureIgnoreCase)))
{
   // ...
}

Answer 2

您需要传递lambda表达式：

ignored_words.Any(w => word.Equals(w, StringComparison.OrdinalIgnoreCase)

但是，通过使用更多LINQ：

，您可以使代码更简单，更快捷

foreach (string word in words.Except(ignored_words, StringComparer.OrdinalIgnoreCase))

Answer 3

作为一种更有效的方式：

// note: the exact comparer deserves some thought; cultural? ordinal? invariant?
var ignored_words = new HashSet<string>(StringComparer.CurrentCultureIgnoreCase)
{
    "the", "and", "I"
};

foreach (string word in words)
{
    if (!ignored_words.Contains(word))
    {
        // perform actions on desired words only
    }
}

忽略Linq.Any中的案例，C＃

3 个答案: