Path: csiph.com!eternal-september.org!feeder.eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.programming
Subject: Re: Coding while drunk and stoned take 2. (Yes, I know this is a cross post)
Date: Thu, 27 Feb 2020 21:06:27 +0000
Organization: A noiseless patient Spider
Lines: 27
Message-ID: <87a753viy4.fsf@bsb.me.uk>
References: <0b8d1b58-3651-47ed-a2b8-63dc1d659c91@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Injection-Info: reader02.eternal-september.org; posting-host="c5b2f88804383f9a4f3ed96188f26610"; logging-data="12879"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18r8I7iI0Hhhh/o6PaaYOHXPR5y4yLYwEs="
Cancel-Lock: sha1:TfqGAKgwiOTiuZXVIdg9xzJ3N70= sha1:Hg8Nfl/m7YovRoojtFQaJIy8JrA=
X-BSB-Auth: 1.d64db599aaa773d3a81d.20200227210627GMT.87a753viy4.fsf@bsb.me.uk
Xref: csiph.com comp.programming:10696

"Chad Altenburg, Ph.D." <cdalten@gmail.com> writes:

> https://codingbat.com/prob/p180759 
>
> And here is the problem statement... 
>
> Look for patterns like "zip" and "zap" in the string -- length-3,
> starting with 'z' and ending with 'p'. Return a string where for all
> such words, the middle letter is gone, so "zipXzap" yields "zpXzp".
>
> zipZap("zipXzap") → "zpXzp" 
> zipZap("zopzop") → "zpzp" 
> zipZap("zzzopzop") → "zzzpzp"

There's are some interesting corner cases.  What about

  zipZap("zipp") → "zpp" or "zp"?

And if "overlapping" zXp strings like this are to be ignored, the
problem statement is not clear about

  zipZap("zzpp") → "zpp" or "zzp"?

You get different result from forward and reverse scans.

-- 
Ben.