Because not every character is a valid optional nose.

A smiley face can have a nose but it does not have to. **Valid characters for a nose are - or ~**

using the initial value parameter for the reduce method is an elegant way of handling the empty array scenarios. Something new I've learn't today, thanks.

How does this have anything to do with math?

Like for this kind Kata!

Lite ASCII graphic kata!)

please, do not raise issues to ask for help, use questions instead

print your input. your code has false positives, for example it returns 1 for [";~P", "; D"]. neither of these is a valid smiley according to the rule: P is not a valid mouth, and there can be no whitespace between the eyes and the mouth

I think there is somethin wrong in the random tests. For each of these three tests I have the same amount of smileys but the error is: "Test failed. Expected: 2 But was: 3".

Has somemone the same problem?

total = 2:
"-P" "8)" ":-)" "8~P" ";)" "P" "-)" "8 ("

total = 0:
";~P" "8("

total = 2:
"8D" ": D" "8 D" ";D" ":)" "8-P"

Nice and short!

your code fails to detect some smileys, e.g. ":-D"

From the description:

Each smiley face must contain a valid pair of eyes. Eyes can be marked as : or ;
                                                                               ^
A smiley face can have a nose but it does not have to. Valid characters for a nose are - or ~
                                                                                            ^
Every smiling face must have a smiling mouth that should be marked with either ) or D
                                                                                    ^

You're wrong, the test is fine.

And in the description not all valid and invalid combinations are listed, just a few as examples.

C# Completions 5629

Are you sure they don't work correctly? I don't think so. Please read this before creating a kata issue and provide some proof when you create one.

kata is not working successfully in c#
random test in not working corectly.
I have all suggeted smiles in filter but somehow its not workin 🙄

Test # 2: There is no smile {;~D} in Valids -> wrong Kata