[erlang-questions] comments on erlang course

Kenneth Lundin <>
Thu Aug 28 09:13:12 CEST 2008


Hi and thanks for the comments, I will take a look and make some
corrections to the
course. It has been around for about 10 years and these are the first
comments I have
seen.

As an alternative I recommend reading the "Getting Started" document
in the official
Erlang/OTP documentation. You find it on-line here
http://erlang.org/doc/getting_started/part_frame.html

/Kenneth Erlang7OTP team, Ericssona

2008/8/28 Bill McKeeman <>:
> Suggestion for http://www.erlang.org/course/course.html
>
>
>
> I am a newbie, so I am seeing this tutorial fresh for the last time.
>
> Here are my comments, most of which are suggestions for improvement.
>
> I am guessing the owner of the html above will see this 'question'.
>
>
>
> /s/ Bill McKeeman
>
>
>
> Sequential Programming
>
>
>
>   Integers   Note
>
>     . extended precision (perhaps as an example).
>
>   Atoms   Note
>
>     . some atoms are reserved.
>
>   Variables can start with _.  Should mention "don't care" _.
>
>   Complex Data Structures   hyphenation typos (3)
>
>   Module System    There is no double/2: misleading example
>
>   Function Syntax    Instead of ..., use body1; body2; ...
>
>   Function Syntax   Note
>
>     .  The last expression in the body is the function value
>
>   Examples of Guards  Armstrong recommends =:=
>
>   Shell Commands  Use X or Var, not both for f(X).
>
>
>
>   By the way, if U is a process id, does f(U) create an orphan?
>
>
>
>  Concurrent Programming
>
>
>
>   Simple Message Passing
>
>     B ! foo.   receive
>
>                  foo->
>
>                    actions
>
>                end.
>
>     is a simpler example.  self() does not need to be in both.
>
>
>
>   Client Server Model    Note
>
>     . The client will wait for the reply.
>
>
>
>   Use of Timeouts   typo iin, typo miliseconds
>
>
>
> Error Handling
>
>   Exit Signals propogate through Links    typo eventuall
>
>   Robust Systems can be made by Layering    typo ocuring  typo deper
>
>
>
> Advanced Topics
>
>   Throughout--- use of ` when ' is intended.  Hard to read.
>
>   Port Protocols    Typo  he instead of The
>
>   Last Call Optimization.    I do not see why the tail recursion
>
>     server(Data1) cannot be placed after the end of receive.
>
>     There are other errors also.  I recommend
>
>
>
> -module(foo).
>
> -export([server/1]).
>
>
>
> server(Data) ->
>
>  receive
>
>    {From, Info} ->
>
>       Data1 = process_info(From, Info, Data);
>
>    {From, Ref, Query} ->
>
>       {Reply, Data1} = process_query(From, Query, Data),
>
>       From ! {Ref, Reply}
>
>   end,
>
>   server(Data1).
>
> process_info(_,_,_) -> 1.
>
> process_query(_,_,_) -> {2,3}.
>
>
>
> Process Dictionary    typo diction instead of dictionary
>
>   typo referencial instead of referential
>
>
>
> Obtaining System Information    typo dic tionary
>
>
>
>
>
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> 
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>



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