C# Online Compiler | .NET Fiddle

<no name> by Anonymous

#nullable enable
using System;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine("Hello World");
	}
	
	static void patternCheck(string[]? items) {
        if (items is [..]) {
           // See, no warning here.
        }
    }

    static void countCheck(string[]? items) {
        if (items.Length > 0) {
    		// Warning here! items might be null. Calling items.length would result in a null refference exception!
        }
    }
}

​x
 
#nullable enable
using System;
                    
public class Program
{
    public static void Main()
    {
        Console.WriteLine("Hello World");
    }
    
    static void patternCheck(string[]? items) {
        if (items is [..]) {
           // See, no warning here.
        }
    }
​
    static void countCheck(string[]? items) {
        if (items.Length > 0) {
            // Warning here! items might be null. Calling items.length would result in a null refference exception!
        }
    }
}

CheckIfRegexAcceptsLowercase:
abc IgnoreCase => True == True
ABC IgnoreCase => True == True
[ABC] None => False == False
[abc] None => True == True
[abc^ABC] None => True == True
[ABC^abc] None => False == False
\[abc^ABC\] None => True == True
\[ABC^abc\] None => True == True
[aBC^Abc] None => True == True
[Abc^aBC] None => True == True
\p{Ll} None => True == True
\\p{Ll} None => True == True
\P{Ll} None => False == False
\p{Lu} None => False == False
\\p{Lu} None => True == True
\P{Lu} None => True == True

CheckIfRegexAcceptsUppercase:
abc IgnoreCase => True == True
ABC IgnoreCase => True == True
[ABC] None => True == True
[abc] None => False == False
[abc^ABC] None => False == False
[ABC^abc] None => True == True
\[abc^ABC\] None => True == True
\[ABC^abc\] None => True == True
[aBC^Abc] None => True == True
[Abc^aBC] None => True == True
\p{Ll} None => False == False
\\p{Ll} None => True == True
\P{Ll} None => True == True
\p{Lu} None => True == True
\\p{Lu} None => True == True
\P{Lu} None => False == False

Last Run:	8:08:16 am
Compile:	0.282s
Execute:	0.012s
Memory:	208kb
CPU:	0.016s

View IL Code