C# non-vowel words

c++extension-methods

I want an extension method that needs to return non-vowel words.I designed

 public static IEnumerable<T> NonVowelWords<T>(this IEnumerable<T> word)
    {
        return word.Any(w => w.Contains("aeiou"));
    }

I received error as "T" does not contain extanesion method "Contains".

Best Solution

You don't need to use a generic method if you're always dealing with strings.

public static IEnumerable<string> NonVowelWords(this IEnumerable<string> words)
{
    char[] vowels = { 'a', 'e', 'i', 'o', 'u' };

    return words.Where(w => w.IndexOfAny(vowels) == -1);
}

Related Solutions

C# – Use of var keyword in C#

I still think var can make code more readable in some cases. If I have a Customer class with an Orders property, and I want to assign that to a variable, I will just do this:

var orders = cust.Orders;

I don't care if Customer.Orders is IEnumerable<Order>, ObservableCollection<Order> or BindingList<Order> - all I want is to keep that list in memory to iterate over it or get its count or something later on.

Contrast the above declaration with:

ObservableCollection<Order> orders = cust.Orders;

To me, the type name is just noise. And if I go back and decide to change the type of the Customer.Orders down the track (say from ObservableCollection<Order> to IList<Order>) then I need to change that declaration too - something I wouldn't have to do if I'd used var in the first place.

C# – add extension methods to an existing static class

No. Extension methods require an instance variable (value) for an object. You can however, write a static wrapper around the ConfigurationManager interface. If you implement the wrapper, you don't need an extension method since you can just add the method directly.

 public static class ConfigurationManagerWrapper
 {
      public static ConfigurationSection GetSection( string name )
      {
         return ConfigurationManager.GetSection( name );
      }

      .....

      public static ConfigurationSection GetWidgetSection()
      {
          return GetSection( "widgets" );
      }
 }

Best Solution

Related Solutions

C# – Use of var keyword in C#

C# – add extension methods to an existing static class

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