Contains Value with IEqualityComparer<T> - CSharp System.Collections.Generic

CSharp examples for System.Collections.Generic:IEnumerable

  1. HOME
  2. CSharp
  3. System.Collections.Generic
  4. IEnumerable

Description

Contains Value with IEqualityComparer<T>

Demo Code

// Permission is hereby granted, free of charge, to any person
using System.Globalization;
using System.Linq;
using System.Collections;
using System.Text;
using System.Reflection;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System;/*from  ww  w.j a  v a  2  s .  c  o m*/

public class Main{
        // this is here because LINQ Bridge doesn't support Contains with IEqualityComparer<T>
    public static bool ContainsValue<TSource>(this IEnumerable<TSource> source, TSource value, IEqualityComparer<TSource> comparer)
    {
      if (comparer == null)
        comparer = EqualityComparer<TSource>.Default;

      if (source == null)
        throw new ArgumentNullException("source");

      foreach (TSource local in source)
      {
        if (comparer.Equals(local, value))
          return true;
      }

      return false;
    }
}

Related Tutorials