On Tue, Oct 6, 2009 at 2:50 PM, Hugh Aguilar <hugoagui...@rosycrew.com> wrote:
> Well, I've taken a stab at writing some documentation comparing Factor to
> Forth. Take a look at this (www.rosycrew.org/FactorVsForth.dvi) and let me
> know if this is going in a direction that you think will be useful.
It's an interesting read - I like seeing what a Forth programmers
perspective is on Factor. Personally I find your use of the term 'real
world' odd since the meaning is obviously different depending on the
type of development you do. To me, 'real world' is any application
that gets used. Including web applications (What I tend to use and
develop in Factor) and desktop applications.
Some of the Factor examples could do with tweaking. One quick example
is your first definition of 'pars':
: pars ( seq -- val )
dup length 1 = [ first ] [
dup first swap rest pars
] if ;
recursive
Much shorter is:
: parse ( seq -- val )
unclip [ par ] reduce ;
You should definitely investigate the use of combinators rather than
writing recursive functions. This is a strength of Factor (and similar
languages).
There have been Forth's that have quotations by the way. 4p provides
the syntax: C{ 1 2 + } to create an anonymous word, leaving the
execution pointer on the stack. You can get it here:
http://maschenwerk.de/
Chris.
--
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