For loop inside if/else inside while. Proper syntax

Question

Why doesn't this work? I'm getting unexpected keyword_end.

while(!k && DATA[q])
    if DATA[q] == 'aa' && DATA[p] == 'aa'
        pl = DATA[r]
        for i in 0..pl
            PACK[i] = DATA[i+4]
        end

        k+=1 #end while 
    else
        q++
        p++
        r++
    end
end

score 4 · Answer 1 · edited May 23 '17 at 11:58

4

You are getting error because ++ does not work in Ruby.

Ruby has no pre/post increment/decrement operator. For instance, x++ or x-- will fail to parse. More importantly, ++x or --x will do nothing! In fact, they behave as multiple unary prefix operators: -x == ---x == -----x == ...... To increment a number, simply write x += 1.

source (which indeed are the words of Ruby's author himself.)

You should replace them as follows:

q+=1
p+=1
r+=1

edited May 23 '17 at 11:58

Community

1
1

answered Jun 15 '15 at 14:31

shivam

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My love and gratitude – John Smith Jun 15 '15 at 14:36
There are other syntax errors in the code. You solved only a part of the problem. – Ely Jun 15 '15 at 14:39
was my answer factually incorrect? I cant understand the reason for downvote. – shivam Jun 15 '15 at 14:40
1

No reason for downvoting here – mdesantis Jun 15 '15 at 14:41
I got it. You need to edit your answer, so I can revoke my downvote. – Ely Jun 15 '15 at 14:44
Since OP is new to Ruby, my answer explains him how increment operators works here, which seemed to the main issue with his approach. I hope that was useful. :) – shivam Jun 15 '15 at 14:47
1

It is indeed. Sorry, I thought your answer was incomplete. – Ely Jun 15 '15 at 14:48
1

Upvoted since the answer makes sense. I really can't understand these serial downvoters. – Simone Carletti Jun 15 '15 at 14:49
No issues. Thanks for agreeing at last.. :D – shivam Jun 15 '15 at 14:49
@SimoneCarletti You're a bit late to the party. I corrected. – Ely Jun 15 '15 at 14:50
@shivam You need to edit your answer, so I can upvote. My vote is locked. – Ely Jun 15 '15 at 15:33
@Elyasin I have edited it. Thanks for the goodwill :) – shivam Jun 15 '15 at 15:39
@shivam Can you do me a favor? I need one more downvote, so I can delete my post and get a Peer Pressure Badge. Would be cool. – Ely Jun 15 '15 at 15:51

For loop inside if/else inside while. Proper syntax

1 Answers1