Re: a functional programming library

[Bo Waggoner <luafunctional@...>]

Hi, so, I actually found this bug with version 1.0, and had just fixed it and updated to version 1.001 before sending out the email. With the current files in the repository, the test runs fine on my system. Could you let me know if that's the problem? Thanks for getting back to me!!

Thanks also for the reply, Javier! I have no experience with modules, so I love how, in Lua, "it just works."

Bo

On Fri, Sep 30, 2011 at 12:19 PM, Andrew Wilson <agrwagrw@gmail.com> wrote:

In sample code provided something seems wrong with sum function?

> lfunc = dofile('lua-functional.lua')  -- load all functions into the table
> lfunc
> lfunc.loadglobally(lfunc)  -- now all functions are in the global namespace
> -- first line generates a list of fibonnacci numbers below 100
> fibs = gent({1,2}, function(t,ind) return t[ind-1]+t[ind-2] end,
> function(t,ind) return geq(ind,100) end)
> odd = compose(apply(eq,1),applyn(mod,2,2))
> list = listcomp(function(x) return x*x end, fibs, odd)
> sum = apply(foldl1,add)

lua: lua-functional.lua:273: attempt to call local 'iter' (a number value)
stack traceback:
       lua-functional.lua:273: in function <lua-functional.lua:267>
       (tail call): ?
       lua-functional-fact.lua:10: in main chunk
       [C]: ?
>Exit code: 1

On Fri, Sep 30, 2011 at 11:27 AM, Bo Waggoner <luafunctional@gmail.com> wrote:
> Hi all, this is my first time posting to the mailing list!
> I've created and posted a functional programming library, which you can
> download here:
> https://bitbucket.org/luafunctional/lua-functional
> This was mainly just something I did for fun and because I really enjoy both
> FP and Lua, and I hope it might be useful! I know there are some other
> similar resources, so here's some of the attributes of this one:
> Pros:
> -pretty big set of functions: map, zips, folds, filters, list comprehension,
> ranges, currying, scans, and mini helper functions.
> -documentation
> -somewhat well tested (has a test suite)
> -"plug and play" (see example below) -- not a module (or maybe this is a
> con?)
> Cons:
> -performance not benchmarked/known
> I would love any feedback! The source is completely free, so it would be
> great if anyone wants to incorporate these functions or the library into a
> different project or library as well.
> Here's an example (sum the squares of the odd fibonnacci numbers under 100):
> lfunc = dofile('lua-functional.lua')  -- load all functions into the table
> lfunc
> lfunc.loadglobally(lfunc)  -- now all functions are in the global namespace
> -- first line generates a list of fibonnacci numbers below 100
> fibs = gent({1,2}, function(t,ind) return t[ind-1]+t[ind-2] end,
> function(t,ind) return geq(ind,100) end)
> odd = compose(apply(eq,1),applyn(mod,2,2))
> list = listcomp(function(x) return x*x end, fibs, odd)
> sum = apply(foldl1,add)
> print(sum(list))
>
> Thanks everyone! Again, feedback would be awesome!
> Bo