C# Eval - Compile Method - FizzBuzz Interview Question

CSharp · Console

/Program.cs

// C# Eval Expression
// Doc: https://eval-expression.net/eval-compile

// @nuget: Z.Expressions.Eval

/*
# How to use the Compile Method?

The `Compile` method allows you to compile any C# code or expression at runtime and return a delegate.

The `Compile` method offers the best performance when you need to execute the same expression multiple times but with different parameters:

The `Compile` method is slightly harder at first to understand than the [Execute](eval-execute) method. However, the `Compile` method offers the best performance as you directly use the delegate (compiled method).

See more: https://eval-expression.net/eval-compile
*/

using System;
using System.Collections.Generic;
using Z.Expressions;

public class Program
{
	public static void Main()
	{
		var fizzBuzzCompiled = Eval.Compile<Func<int, string>>(@"
if (i % 15 == 0)
	return $'{i} => FizzBuzz';
else if (i % 3 == 0)
	return $'{i} => Fizz';
else if (i % 5 == 0)
	return $'{i} => Buzz';
else
	return $'{i} => {i}';
", "i");
		
		var answers = new List<string>();
		
		for(int i = 0; i <= 100; i++)
		{
			answers.Add(fizzBuzzCompiled(i));
		}

		Console.WriteLine(string.Join(Environment.NewLine, answers));
	}
}