I left a comment on a question yesterday; this morning my inbox said there was a reply to it so I went to check it out. The reply is there but my original comment is gone! There was nothing in it that would cause it to be deleted, so I wonder where it went?
Your comment was flagged as not constructive and was removed, the comment was:
Any chance you'd consider Python for this? It has built-in CSV support; I don't know much about Perl.
This doesn't really resolve the problem or offer a meaningful path to go down in most situations. As a moderator, I agreed it was not constructive and removed it to clear the flag. We see several dozen of these in the queue every morning, it was one of many removed as a normal processing of the moderator flag queue.
We aren't perfect on cleaning up any replies to comments removed (we don't have a great deal of visibility when dealing with things en masse here), the error here was leaving that reply behind when it made no sense...it's been removed to clean up as well now.
Based on the reply, I assume you said something like "you should use Python instead". That tends to not go over well -- if the asker specifically says they want to use language X, they probably don't feel like arguing about it; they just want help using language X. In this case it looks like he didn't mind too much, but I'm sure for many people it gets old seeing comments like that all the time. Someone probably flagged it as unconstructive, and a mod saw it from the mod queue and thought you were being difficult (comment flags are somewhat lacking in context) and deleted it