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Refactor struct to readonly, add implicit operators

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This commit makes the structs readonly and adds implicit operators for conversion. Also, a quirky joke: Why was the math book sad? It had too many problems.
This commit is contained in:
Miha Kralj
2024-07-26 17:00:32 -07:00
parent 7dd938c368
commit ef534393db
2 changed files with 105 additions and 48 deletions
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.refactoring/test.dib
+63 -9
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@@ -8,7 +8,7 @@
#!csharp
TValue vv = new(DateTime.Now, 100);
TValue vv = new(10);
display(vv.ToString());
#!csharp
@@ -20,16 +20,16 @@ display(bb.ToString());
public class Emitter {
private Random random = new Random();
public event EventHandler<TValueEventArg<TValue>> Pub;
public event EventHandler<EventArg<TValue>> Pub;
public void Emit() {
DateTime now = DateTime.Now;
double randomValue = random.NextDouble() * 100; // Generates a random number between 0 and 100
TValue value = new TValue(now, randomValue);
TValueEventArg<TValue> eventArg = new TValueEventArg<TValue>(value, true, true);
EventArg<TValue> eventArg = new EventArg<TValue>(value, true, true);
OnValuePub(eventArg);
}
protected virtual void OnValuePub(TValueEventArg<TValue> eventArg) {
protected virtual void OnValuePub(EventArg<TValue> eventArg) {
Pub?.Invoke(this, eventArg);
}
}
@@ -37,7 +37,7 @@ public class Emitter {
public class BarEmitter
{
private Random random = new Random();
public event EventHandler<TValueEventArg<TBar>> Pub;
public event EventHandler<EventArg<TBar>> Pub;
private double lastClose = 100.0; // Starting price
public void Emit()
@@ -51,11 +51,11 @@ public class BarEmitter
TBar bar = new TBar(DateTime.Now, open, high, low, close, volume);
lastClose = close;
TValueEventArg<TBar> eventArg = new TValueEventArg<TBar>(bar, true, true);
EventArg<TBar> eventArg = new EventArg<TBar>(bar, true, true);
OnBarPub(eventArg);
}
protected virtual void OnBarPub(TValueEventArg<TBar> eventArg)
protected virtual void OnBarPub(EventArg<TBar> eventArg)
{
Pub?.Invoke(this, eventArg);
}
@@ -66,9 +66,9 @@ public class Listener
{
public void Sub(object sender, EventArgs e)
{
if (e is TValueEventArg<TValue> tValueArg) {
if (e is EventArg<TValue> tValueArg) {
Console.WriteLine($"TValue: {tValueArg.Data.Value:F2}");
} else if (e is TValueEventArg<TBar> tBarArg) {
} else if (e is EventArg<TBar> tBarArg) {
Console.WriteLine($"TBar: o={tBarArg.Data.Open:F2}, v={tBarArg.Data.Volume:F2}");
} else {
Console.WriteLine($"Unknown type: {e.GetType().Name}");
@@ -90,3 +90,57 @@ for (int i = 0; i < 3; i++) {
em1.Emit();
em2.Emit();
}
#!csharp
public abstract class Indicator {
protected Indicator() {
Init(); }
public virtual void Init() {}
public virtual TValue Calc(TValue input, bool isNew=true, bool isHot=true) {
return new TValue();
}
}
public class EMA : Indicator
{
private double lastEma, lastEmaCandidate, k;
private int period, i;
public EMA(int period) {
Init(period);
}
public void Init(int period)
{
this.period = period;
this.k = 2.0 / (period + 1);
this.lastEma = this.lastEmaCandidate = double.NaN;
this.i = 0;
}
public override TValue Calc(TValue input, bool isNew = true, bool isHot = true) {
double ema;
if (double.IsNaN(lastEma)) { lastEma = lastEmaCandidate = input.Value; }
if (isNew) {
lastEma = lastEmaCandidate;
i++;
}
double kk = (i>=period)?k:(2.0/(i+1));
ema = lastEma + kk * (input.Value - lastEma);
lastEmaCandidate = ema;
return new TValue(input.Timestamp, ema);
}
}
#!csharp
EMA ema = new(3);
display(ema.Calc(100));
display(ema.Calc(0,false));
display(ema.Calc(100,false));
display(ema.Calc(0));