C#•2y ago

✅ Simple question

I have a code which

if ("any" is "item1" or "item2" or "any")
{
    Console.WriteLine("okay");
}

if ("any" is "item1" or "item2" or "any")
{
    Console.WriteLine("okay");
}

that prints okay but out of curiosity, can I do this with symbols? like

if ("any" == "item1" || "item2" || "any") // "any" == "item1" || "any" == "item2" will be corrent but really bad readable
{
    Console.WriteLine("okay");
}

if ("any" == "item1" || "item2" || "any") // "any" == "item1" || "any" == "item2" will be corrent but really bad readable
{
    Console.WriteLine("okay");
}

6 Replies

ero•2y ago

Well, can you do it? Have you tried? Did it work?

JansthcirlU•2y ago

The first code block is using pattern matching, it's a specific feature where you can use or to test against for different matches. The second code block uses the binary conditional logic operators which only work on booleans (true or false).

TheBoxyBear•2y ago

Only works with bools and it so happens the logical and equality operators return bool. Pattern matching helps make it more readable and can warn you if the expression is contradictory or will always be true. As a side effect, pattern matching only works when comparing to constants.

cumslvt13•2y ago

The code you've shown compiles into plain ||'s. Take a look at sharplab decompile:

internal class Program
{
    private static void <Main>$(string[] args)
    {
        string text = "any";
        if (text == "item1" || text == "item2" || text == "any")
        {
            Console.WriteLine("okay");
        }
    }
}

internal class Program
{
    private static void <Main>$(string[] args)
    {
        string text = "any";
        if (text == "item1" || text == "item2" || text == "any")
        {
            Console.WriteLine("okay");
        }
    }
}

https://sharplab.io/#v2:CYLg1APgAgTADAWAFCwIzOQNwIYCcAE2+AvPgETYB2AnmQNwZICWAZvgBRFMDO5TALgFMAtqjL4A9gTICRMcVPJVaASmQBvZPm34oqAJzsyEgNbZVDJAF8gA

SharpLab

C#/VB/F# compiler playground.

Groophy•2y ago

Thanks for best explain. $close

MODiX•2y ago

Use the /close command to mark a forum thread as answered

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Programming

✅ Simple question