77 lines
2.2 KiB
C#
77 lines
2.2 KiB
C#
//-- ex-gen-logger
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//-- ex-gen-struct-pair
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//-- ex-gen-logging-pairs
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// 1.2 alpha
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using System;
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public class Log<T> {
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private const int SIZE = 5;
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private static int instanceCount = 0;
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private int count = 0;
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private T[] log = new T[SIZE];
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public Log() { instanceCount++; }
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public static int InstanceCount { get { return instanceCount; } }
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public void Add(T msg) { log[count++ % SIZE] = msg; }
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public int Count { get { return count; } }
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public T Last {
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get { // Return the last log entry, or null if nothing logged yet
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return count==0 ? default(T) : log[(count-1)%SIZE];
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}
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set { // Update the last log entry, or create one if nothing logged yet
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if (count==0)
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log[count++] = value;
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else
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log[(count-1)%SIZE] = value;
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}
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}
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public T[] All {
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get {
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int size = Math.Min(count, SIZE);
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T[] res = new T[size];
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for (int i=0; i<size; i++)
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res[i] = log[(count-size+i) % SIZE];
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return res;
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}
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}
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}
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class TestLog {
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public static void Main(String[] args) {
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Log<String> log1 = new Log<String>();
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log1.Add("Reboot");
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log1.Add("Coffee");
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Log<DateTime> log2 = new Log<DateTime>();
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log2.Add(DateTime.Now);
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log2.Add(DateTime.Now.AddHours(1));
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DateTime[] dts = log2.All;
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// Printing both logs:
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foreach (String s in log1.All)
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Console.Write("{0} ", s);
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Console.WriteLine();
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foreach (DateTime dt in dts)
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Console.Write("{0} ", dt);
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Console.WriteLine();
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TestPairLog();
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}
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public static void TestPairLog() {
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Log<Pair<DateTime,String>> log = new Log<Pair<DateTime,String>>();
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log.Add(new Pair<DateTime,String>(DateTime.Now, "Tea leaves"));
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log.Add(new Pair<DateTime,String>(DateTime.Now.AddMinutes(2), "Hot water"));
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log.Add(new Pair<DateTime,String>(DateTime.Now.AddMinutes(7), "Ready"));
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Pair<DateTime,String>[] allMsgs = log.All;
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foreach (Pair<DateTime,String> p in allMsgs)
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Console.WriteLine("At {0}: {1}", p.Fst, p.Snd);
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}
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}
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public struct Pair<T,U> {
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public readonly T Fst;
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public readonly U Snd;
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public Pair(T fst, U snd) {
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this.Fst = fst;
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this.Snd = snd;
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}
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}
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