I'm working on modernizing Rosetta Code's infrastructure. Starting with communications. Please accept this time-limited open invite to RC's Slack.. --Michael Mol (talk) 20:59, 30 May 2020 (UTC)

Category talk:UnixPipes

From Rosetta Code

UNIX Shell?[edit]

What is the difference between this "language" and UNIX Shell? Could we consider it an implementation or dialect instead? --IanOsgood 08:14, 8 April 2008 (MDT)

It is based on the observation that a typical Unix Shell contains two very different languages with in it. One with an imperative, algol like syntax and semantics. The second is dataflow oriented, and semantics is based on immutable (possibly infinite) sequences.

While shells provide both in the same language, I would like to posit that the embedding of Pipes in unix is similar to embedding of SQL with in PLSQL - i.e. both are essentially different paradigms, and provide very different mechanisms for computation.

It is even more clear if you consider a similar system : CMS pipelines in Rexx. While Rexx is used to define stages, and even utilize the result of CMS pipelines, the pipelines have tottally different syntax and semantics from Rexx and exist indipendentaly of Rexx. Rahul 09:21, 8 April 2008 (MDT)

It occurred to me...sed is a stream-operating tool that uses regular expressions, which are themselves turing-complete, and available on every non-embedded Unix platform I've encoutnered. Is sed omitted from the tool set? --Short Circuit 19:59, 15 February 2009 (UTC)
Regex are finite automata, by themselves they are not turing complete, however I am not very sure if sed provides enough programming constructs to make it turing complete. It could very well be, so I would need to work on the general description again.


I question whether this can be defined as a language in the same sense that other languages on Rosetta Code are, but it's certainly a unique and worthwhile approach. I'm looking forward to seeing how it can be used. --Short Circuit 20:55, 10 April 2008 (MDT)

Deleted solutions[edit]

I deleted the UnixPipes solutions for Sockets and for Hello world/Standard error, because they were too similar to the UNIX Shell solutions. The number of UnixPipes solutions decreases from 40 to 38. --Kernigh 00:56, 10 August 2011 (UTC)