86 lines
2.6 KiB
C#
86 lines
2.6 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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/// Returns a number that represents how many elements in the specified
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/// array satisfy a condition.
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/// </summary>
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/// <param name="source">An array that contains elements to be tested and counted.</param>
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/// <param name="predicate">A function to test each element for a condition.</param>
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/// <returns>A number that represents how many elements in the array satisfy the condition
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/// in the predicate function.</returns>
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public static int CountF<T>(this T[] source, Func<T, bool> predicate)
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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 (predicate == null)
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{
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throw Error.ArgumentNull("predicate");
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}
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int count = 0;
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for (int i = 0; i < source.Length; i++)
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{
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checked
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{
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if (predicate(source[i]))
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{
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count++;
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}
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}
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}
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return count;
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}
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// ------------------------------ Lists ---------------------
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/// <summary>
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/// Returns a number that represents how many elements in the specified
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/// list satisfy a condition.
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/// </summary>
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/// <param name="source">A list that contains elements to be tested and counted.</param>
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/// <param name="predicate">A function to test each element for a condition.</param>
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/// <returns>A number that represents how many elements in the list satisfy the condition
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/// in the predicate function.</returns>
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public static int CountF<T>(this List<T> source, Func<T, bool> predicate)
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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 (predicate == null)
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{
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throw Error.ArgumentNull("predicate");
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}
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int count = 0;
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for (int i = 0; i < source.Count; i++)
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{
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checked
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{
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if (predicate(source[i]))
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{
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count++;
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}
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}
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}
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return count;
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}
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}
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}
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