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gyuwon/AnonymousFunctionsVsLocalFunctions.cs

Created September 30, 2017 06:53
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AnonymousFunctionsVsLocalFunctions.cs
using System;
namespace AnonymousFunctionsVsLocalFunctions
{
public class Program
{
public static void Main(string[] args)
{
var functions = new Functions();
Console.WriteLine(functions.PerformAnonymousFunction());
Console.WriteLine(functions.PerformAnonymousFunctionWithParam());
Console.WriteLine(functions.PerformAnonymousFunctionWithParamAsCallback());
Console.WriteLine(functions.PerformAnonymousFunctionWithLocal());
Console.WriteLine(functions.PerformAnonymousFunctionWithMember());
Console.WriteLine(functions.PerformAnonymousFunctionWithLocalSideEffect());
Console.WriteLine(functions.PerformAnonymousFunctionWithLocalSideEffectAsCallback());
Console.WriteLine(functions.PerformAnonymousFunctionWithMemberSideEffect());
Console.WriteLine(functions.PerformLocalFunction());
Console.WriteLine(functions.PerformLocalFunctionWithParam());
Console.WriteLine(functions.PerformLocalFunctionWithParamAsCallback());
Console.WriteLine(functions.PerformLocalFunctionWithLocal());
Console.WriteLine(functions.PerformLocalFunctionWithMember());
Console.WriteLine(functions.PerformLocalFunctionWithLocalSideEffect());
Console.WriteLine(functions.PerformLocalFunctionWithLocalSideEffectAsCallback());
Console.WriteLine(functions.PerformLocalFunctionWithMemberSideEffect());
}
}
public class Functions
{
private int _value = 0;
public int PerformAnonymousFunction()
{
Func<int> func = () => 1;
return func();
}
public int PerformAnonymousFunctionWithParam()
{
Func<int, int> func = x => x + 1;
return func(1);
}
public int PerformAnonymousFunctionWithParamAsCallback()
{
Func<int, int> func = x => x + 1;
return Invoke(func, 1);
}
public int PerformAnonymousFunctionWithLocal()
{
int x = 1;
Func<int> func = () => x + 1;
return func();
}
public int PerformAnonymousFunctionWithMember()
{
Func<int> func = () => _value + 1;
return func();
}
public int PerformAnonymousFunctionWithLocalSideEffect()
{
int x = 1;
Func<int> func = () => ++x;
return func();
}
public int PerformAnonymousFunctionWithLocalSideEffectAsCallback()
{
int x = 1;
Func<int> func = () => ++x;
return Invoke(func);
}
public int PerformAnonymousFunctionWithMemberSideEffect()
{
Func<int> func = () => ++_value;
return func();
}
public int PerformLocalFunction()
{
int func() => 1;
return func();
}
public int PerformLocalFunctionWithParam()
{
int func(int x) => x + 1;
return func(1);
}
public int PerformLocalFunctionWithParamAsCallback()
{
int func(int x) => x + 1;
return Invoke(func, 1);
}
public int PerformLocalFunctionWithLocal()
{
int x = 1;
int func() => x + 1;
return func();
}
public int PerformLocalFunctionWithMember()
{
int func() => _value + 1;
return func();
}
public int PerformLocalFunctionWithLocalSideEffect()
{
int x = 1;
int func() => ++x;
return func();
}
public int PerformLocalFunctionWithLocalSideEffectAsCallback()
{
int x = 1;
int func() => ++x;
return Invoke(func);
}
public int PerformLocalFunctionWithMemberSideEffect()
{
int func() => ++_value;
return func();
}
private int Invoke(Func<int> func) => func();
private int Invoke(Func<int, int> func, int arg) => func(arg);
}
}
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