====== Week 10 ======

~~NOTOC~~

===== Channels, CSP, and Go =====

  * Last week:
    * Peter Welch's [[courses:cs377-202201:welch-lectures:top|Occam-pi Lecture Notes]]
    * Go demo and starter code: see last week's notes for details
    * Demo and codewalk of ''csp-dining-philosophers.go'' \\ \\ 


  * Demo and codewalk: Sieve of Eratosthenes (Prime Number Sieve) ''sieve.go''
    * Go language features highlighted:
      * Only one looping construct in Go: for loop 
        * all three parts are optional: init statement, conditional expression, post statement
      * channel declarations in function headers
        * can specify syntactically whether channel is for reading from: <code><-chan</code> or writing to: <code>chan<-</code>
    * To run this program: <code>
$ go run sieve.go
</code> 
    * Monitor the running program:
      * use ''top'' command for system info while running
      * run ''lscpu'' to remind us about system resources 
      * how many processes (goroutines) are running concurrently (if not in parallel)? 
        * use ''wc -l'' and ''watch'' to monitor // // 

  * Assignment 5 posted
    * Sort Pump Gophers {{sort-pump.pdf|PDF}}
    * see a similar example in occam on slides 13--31 of PHW's replicators lecture notes which can be found [[courses:cs377-202651:welch-lectures:top|here]]
    * be sure to read the advice section of the assignment description closely---I tried to document most of the Golang learning curve questions I encountered in the hopes of helping you!
    * Due: Tue, April 14th  \\ \\ 
 
===== Linda and Tuple Space =====

  * History
    * proposed by David Gelernter [[https://en.wikipedia.org/wiki/David_Gelernter|Wikipedia]]
      * while a PhD student at SUNY Stoneybrook
      * now a professor at Yale
      * overcome a great deal personally!
    * origins of name
      * off-color humor
    * implementations
      * C-Linda (Martin Schultz and David Gelernter)
      * Ruby implementation no less off-color! 
    * communications decoupled in 3 dimensions:
      * time
      * space 
      * destination
  * Lecture Notes: {{cs377-linda-lect1.pdf|PDF}}
  * Demo of Ruby/Rinda program
    * from Wikipedia example: \\ [[http://en.wikipedia.org/wiki/Rinda_(Ruby_programming_language)]]
      * link no longer live :-( 
    * sample code: copy from my directory <code text>
$ cp -r /home/mlsmith/cs377-examples/rinda/ ~/cs377/
</code>