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Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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Lepl parser for Python.

Colorless Green.

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Data access via web services.

Cache rewrite.

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© 2006-2015 Andrew Cooke (site) / post authors (content).

Functional programming in Java

From: "andrew cooke" <andrew@...>

Date: Wed, 1 Mar 2006 12:49:18 -0300 (CLST)

I needed a filter for a list.  Rather than reinvent the wheel I downloaded
FunctionalJ - http://functionalj.sourceforge.net/

It's not amazingly elegant (you need to name methods as strings, for
example), but it does the job.  Here's the final code:

  @SuppressWarnings("unchecked")
  public static List<? extends LifetimeAccessControl>
  filterValid(List<? extends LifetimeAccessControl> list) {
    return Functions.filterNot(
      new InstanceFunction(LifetimeAccessControl.class, "isExpired"), list);
  }

Andrew

Mentioned earlier...

From: "andrew cooke" <andrew@...>

Date: Wed, 1 Mar 2006 12:53:46 -0300 (CLST)

Oooops.  Mentioned here - http://www.acooke.org/cute/Functional1.html

Lists only

From: "andrew cooke" <andrew@...>

Date: Fri, 3 Mar 2006 09:17:01 -0300 (CLST)

I forgot to mention that for some crazy reason the library only works on
lists.  Given Java has the generic iterators that are supported by every
collection you'd think that all collection types would be supported.  Very
odd indeed.

Fwd: Re: Lists only

From: "andrew cooke" <andrew@...>

Date: Tue, 29 Aug 2006 23:42:02 -0400 (CLT)

[The latest version also supports generics; it also has some new
reflection functionality that might address the "strings" issue I
mentioned above; Frederic's support for this package is very good -
Andrew]

---------------------------- Original Message ----------------------------
Subject: Re: Lists only
From:    "Frederic Daoud"
Date:    Tue, August 29, 2006 10:44 pm
--------------------------------------------------------------------------

Hi Andrew,

Came across this on your blog:

> I forgot to mention that for some crazy reason the library only works on
> lists.  Given Java has the generic iterators that are supported by every
> collection you'd think that all collection types would be supported.  Very
> odd indeed.

Indeed, very odd that I did that. I corrected this in version 0.8 - now
the library uses collections. If I overlooked it somewhere please let me
know.

Also other comments or suggestions are always welcome..

http://functionalj.sourceforge.net

Cheers,
Frederic

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