EnumTryParseExample | C# Online Compiler

EnumTryParseExample by David Walker (@Grax)

using System;

public class Program
{
	public static void Main()
	{
		var myObject = new DerivedClass();
		BaseClass myObjectBase = myObject;
		
		Console.WriteLine(myObject.GimmeFive());
		Console.WriteLine(myObjectBase.GimmeFive());
		Console.WriteLine();
		Console.WriteLine(myObject.GimmeNine());
		Console.WriteLine(myObjectBase.GimmeNine());
	}
}

public class BaseClass
{
	public string GimmeFive()
	{
		return "base-5";
	}

	public virtual string GimmeNine()
	{
		return "base-9";
	}
}

public class DerivedClass : BaseClass
{
	public string GimmeFive()
	{
		return "derived-5";
	}

	public override string GimmeNine()
	{
		return "derived-9";
	}
}

​x
 
using System;
​
public class Program
{
    public static void Main()
    {
        var myObject = new DerivedClass();
        BaseClass myObjectBase = myObject;
        
        Console.WriteLine(myObject.GimmeFive());
        Console.WriteLine(myObjectBase.GimmeFive());
        Console.WriteLine();
        Console.WriteLine(myObject.GimmeNine());
        Console.WriteLine(myObjectBase.GimmeNine());
    }
}
​
public class BaseClass
{
    public string GimmeFive()
    {
        return "base-5";
    }
​
    public virtual string GimmeNine()
    {
        return "base-9";
    }
}
​
public class DerivedClass : BaseClass
{
    public string GimmeFive()
    {
        return "derived-5";
    }
​
    public override string GimmeNine()
    {
        return "derived-9";
    }
}

Unicode String Replace At Issue
Lets examine string "🎶🔥é-"
🎶🔥é- is length of 6, but there are ONLY 4 characters! Why not len=4?
🎶🔥 are double byte UNICODE characters (> \u10000) of width or len 2 each
🎶🔥é- below will replace space after lasting character '-' (position 4) with a sub using most common techniques seen online

🎶🔥X- using ReplaceAtCharArray
in 1,295 ticks.
🎶🔥Y- using ReplaceAtLinq
in 25,679 ticks.
🎶🔥Z- using ReplaceAtStringManipulation
in 1,133 ticks.
🎶🔥A- using ReplaceAtSubstring
in 1,579 ticks.
🎶🔥W- using SubsituteStringStringBuilder
in 1,387 ticks.
🎶🔥é-4using UnicodeReplaceAt
in 4,633 ticks.

UnicodeReplaceAt replaces properly at position 4 in zero based index string

0🔥é- using UnicodeReplaceAt(0, '0') in 45 ticks.
🎶1é- using UnicodeReplaceAt(1, '1') in 14 ticks.
🎶🔥2- using UnicodeReplaceAt(2, '2') in 14 ticks.
🎶🔥é3 using UnicodeReplaceAt(3, '3') in 36 ticks.
🎶🔥é-4using UnicodeReplaceAt(4, '4') in 11 ticks.
🎶🔥é- using UnicodeReplaceAt(5, '5') - this is beyond end of string, so return orginal string in 11 ticks.

FAST testing.

🎶🔥😊-ā̈bç using UnicodeReplaceAtFast(5, '😊') - cool but still O(100) more :( in 7,253 ticks.
in 1 ticks.
😊 using UnicodeReplaceAtFast(1, '😊') - bounds check - 1 char in 22 ticks.
in 0 ticks.
ā using UnicodeReplaceAtFast(0, '😊') - bounds check - wrong index in 12 ticks.

FASTEST testing.

🎶🔥é-😊bç using UnicodeReplaceAtFastest(5, '😊') - cool but still O(100) more than string.Replace :( in 2,424 ticks.
in 1 ticks.
😊 using UnicodeReplaceAtFastest(1, '😊') - bounds check - 1 char in 23 ticks.
in 0 ticks.
ā using UnicodeReplaceAtFastest(0, '😊') - bounds check - 0 index in 12 ticks.
in 0 ticks.
😊 using UnicodeReplaceAtFastest(5, '😊') - bounds check - after end index in 12 ticks.
in 0 ticks.
🎶🔥é-ā̈😊ç using UnicodeReplaceAtFastest(6, '😊') - bounds check - 1 before end index in 17 ticks.
in 0 ticks.
🎶🔥é-ā̈b😊 using UnicodeReplaceAtFastest(7, '😊') - bounds check - end index in 13 ticks.
in 0 ticks.
🎶🔥é-ā̈bç using UnicodeReplaceAtFastest(8, '😊') - bounds check - after end index in 27 ticks.

String.Replace works, but replaces all characters, not at specific location as above functions

🎶+é- using String.Replace('🔥', '+') in 16 ticks.

Cached Result
Last Run:	10:43:31 pm
Compile:	0.126s
Execute:	0.016s
Memory:	40kb
CPU:	0.031s

View IL Code