Return the closest value in IEnumerable - CSharp System.Collections

CSharp examples for System.Collections:IEnumerable

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Description

Return the closest value in IEnumerable

Demo Code


using System.Linq;
using System.Collections.Generic;
using System;// w ww. j  av a2  s. c om

public class Main{
        /// <summary>
        ///     NB Method will return int. MaxValue for a sequence containing no elements. Intended to be used to match int value
        ///     to enumeration but without directly casting it, instead looking for closest match to target value.
        /// </summary>
        /// <param name="collection">Enumerable collection of integers that make up our collection.</param>
        /// <param name="target">Target value which needs to be compared against collection values.</param>
        /// <returns>Int closest matching in collection to target value.</returns>
        /// <remarks>http://stackoverflow.com/a/10120982</remarks>
        public static int ClosestTo(this IEnumerable<int> collection, int target)
        {
            var closest = int.MaxValue;
            var minDifference = int.MaxValue;
            foreach (var element in collection)
            {
                var difference = Math.Abs((long) element - target);
                if (minDifference <= difference)
                    continue;

                minDifference = (int) difference;
                closest = element;
            }

            return closest;
        }
}

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