77 lines
2.5 KiB
C#
77 lines
2.5 KiB
C#
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using System;
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using System.Collections.Generic;
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namespace JM.LinqFaster
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{
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public static partial class LinqFaster
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{
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// -------------------------- ARRAYS --------------------------------------------
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/// <summary>
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/// Determines whether an array contains a specified element by using the
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/// provided IEqualityComparer.
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/// </summary>
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/// <param name="source">An array in which to locate a value.</param>
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/// <param name="value">The value to locate.</param>
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/// <param name="comparer">An equality comparer to compare values.</param>
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/// <returns>true if the source sequence contains an element that has the specified value; otherwise, false.</returns>
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public static bool ContainsF<TSource>(this TSource[] source, TSource value, IEqualityComparer<TSource> comparer = null)
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{
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if (source == null)
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{
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throw Error.ArgumentNull("source");
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}
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if (comparer == null)
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{
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return Array.IndexOf(source, value) != -1;
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}
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foreach (TSource e in source)
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{
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if (comparer.Equals(e, value))
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{
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return true;
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}
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}
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return false;
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}
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// -------------------------- Lists --------------------------------------------
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/// <summary>
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/// Determines whether a list contains a specified element by using the
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/// provided IEqualityComparer.
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/// </summary>
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/// <param name="source">A list in which to locate a value.</param>
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/// <param name="value">The value to locate.</param>
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/// <param name="comparer">An equality comparer to compare values.</param>
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/// <returns>true if the source sequence contains an element that has the specified value; otherwise, false.</returns>
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public static bool ContainsF<TSource>(this List<TSource> source, TSource value, IEqualityComparer<TSource> comparer = null)
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{
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if (source == null)
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{
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throw Error.ArgumentNull("source");
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}
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if (comparer == null)
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{
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return source.IndexOf(value) != -1;
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}
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for (int i = 0; i < source.Count; i++)
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{
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if (comparer.Equals(source[i], value))
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{
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return true;
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}
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}
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return false;
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}
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}
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}
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