# Is my question THAT similar to be considered duplicated?

Today I have asked a question here on PPCG.

The question consisted in a set of wildcards and groups which one should make a string that matches it.

The question can be found here: String generator based on a wildcard

But it was immediately closed by another used as being a duplicate of the following question: Regex in reverse - decompose regular expressions.

Although the questions seem similar in the title, their content is WAY different!

One is actually to, receive as input, a regex and then generate a string that matches it.
The whole specification is found on the question.

My question is to generate a string that matches some features of a regex, but a regex will be considered invalid input in most of the cases.
Evaluating the wildcard as a regex, using my specification, would (in some cases) generate meaningless matches.

None of the answers will fit into my question, with most of the possible wildcards (like ?[def]{2} which would, for example, generate add while it is an improper regex).
Most of those answers also generate characters outside the expected range of a-z, A-Z and 0-9 (symbols are optional and are rewarded with bonus).

To the core of this: Is my challenge really THAT close to be considered duplicate?

It wasn't intentional and I wasn't aware of the other linked question, which was 8 month ago.

Outside of the scope, I have seen questions being reopened because the winning criteria changed, but the whole question itself was much more similar.
I might be wrong about it, my memory isn't 100% perfect.

• @IsmaelMiguel No they don't need to be perfect fits. If we had a question "Print all even numbers up to n." then "Print all odd numbers up to n." would still be a duplicate of that. I can't tell you more than my opinion: the core algorithm between the challenges will be identical, with the differences being merely cosmetic. – Martin Ender Dec 27 '14 at 1:26