If you mean by mastering that you never have to look at the API documentation, then more languages can have a negative impact. I'd concede that.
But that is comfortably offset by the advantages you gain from seeing through the syntax to the language concepts. It is not even the correct question to ask really. Because mastering of a language might be a secondary goal.
A more interesting question might be: do I know at all which language I should strive to master? And that will require you to look at a few.
But that is comfortably offset by the advantages you gain from seeing through the syntax to the language concepts. It is not even the correct question to ask really. Because mastering of a language might be a secondary goal.
A more interesting question might be: do I know at all which language I should strive to master? And that will require you to look at a few.