lud | Command line DNS query tool , written in rust | DNS library

Well, answering my own question, and to learn from my own stupidity... I declared the character array before actually assigning values to n,m resulting in a "broken array". I spent half a day thinking it was some convoluted C pointer thing I was missing, but turns out it was just an amateur mistake... Literally figured 5 minutes after posting...

You should use recursion to achieve this like shown:

One way to do it is analytic function with first/last option:

^dbfiddle

use this:

But I still couldn't understand why it is still producing this error since to me it is super clear that the parenthesis followed by a fat arrow => is going to be a function...

Yes, it is super clear. The grammar is totally unambiguous. But you are not limited to looking at the input one token at a time, whereas an LR(1) parser is. At the moment when the parser is trying to decide what to do about the a in (a), it cannot yet seen the fat arrow and it has to make its decision before it does. That is, before consuming the ), the parser needs to decide whether what comes before it is an expr or a separated_nonempty_list.

It's possibly worth noting that the grammar is actually LR(2): one more lookahead token, and the conflict could be resolved. That's not much consolation since Menhir does not provide any mechanism for increased lookahead, but it does mean that a solution exists, because the existence of an LR(k) grammar for a language implies the existence of an LR(1) grammar for the same language; there's even a mechanical algorithm to produce the LR(1) grammar.

Rather than transforming the entire grammar, an only slightly messy solution is to isolate the '(a)` cases, which can be done with a pair of apparently redundant rules:

Try this (I used same code structure you required) :

You extract elements using double brackets. You would only use two indices if the list itself had dimensions like a matrix, but it doesn't. It's almost always better to use names for extraction, for future-proofing.

So you want

My guess is that you need to look into the the sequence you loop over. Try changing the second last loop from for(j in i + 1:nrow(A)) to for(j in (i + 1):nrow(A))

mysql_query() function returns the mysqli_result object. Therefore you need to fetch your results.