You don't build a whole customer order in memory and then commit it to the database. Transaction boundaries don't cross pages.

Glorp is a simple OR mapping facility. Its pretty slick but you need to have designed your database sanely for OR mapping to work well. This means you used serial for all primary keys except in join tables for many to many map tables. It also doesn't support TimeTZ or Timestamp because squeak has no support for timezone by default (although I've got a patch that adds this).

It has transactions and you can use blocks for queries.

reads don't require transactions:

session selectOneOf: RSUser where: [:ea | ea name = aName & ea password = aPassword]

if you follow relationships in the block then it works with those too.

writes do require transactions.

session beginUnitOfWork.
movie := RSMovie new title: 'Casablanca'.
studio := RSStudio new name: 'Warner Bros'.
movie studio: studio.
studio movie: movie.
session commitUnitOfWork.

I agree that they would be cool but really hard to add to C.

In Objective C, the block syntax has been lifted to delineate message sends.

[anObject doSomethingWith: anotherObject]

gets translated to

objc_messagesend(anObject,"doSomethingWith:",anotherObject)

which is the tricky dispatch function into the runtime. Cool - thats easy. But block closures automatically get the scope of their surroundings - even if that scope has long vanished the block holds references of it at the time the block was created. So you're going to have some tricky copying of stack state into the block's state that has to live after the stack has popped.

A more limited form could be done conceivably with nested functions but nobody in charge of a compiler or runtime seems intent on advancing the language.

But you're right - blocks are the thing I miss most in ObjectiveC. There is a library called fscript. Its kind of like beanshell for ObjectiveC. An interpreter. More than an interpreter its a Smalltalk interpreter that uses ObjectiveC objects. So you could do something like this with fscript installed as a lib:

[array detect: [@"[:ea | ea name = 'Scott']" asBlock]] and that would work.

There is also Marcel Wehr's HOM (Higher Order Messaging) lib that does something tricky.

[array detect: [[item name] isEqualToString: @"Scott"]]

HOM's detect actually returns a trampoline object whose doesNotUnderstand iterates over the list in a tricky way. Something like that. It only works if the "block" is a pure objective C message send. No arbitrary code because it captures the selectors.

You can find that stuff at [link|http://www.metaobject.com/|http://www.metaobject.com/] under the communit link

Don't know if I mentioned that there's a browser plugin for squeak. Gives you a way to publish a project as an interactive tool on the web.

[link|http://www.squeakland.org|http://www.squeakland.org]

not too easy to come by. Smalltalk jobs in general - I've gotten a few hits for that lately. From all over the US no less. They've been Smalltalk and (insert totally unrelated technology here) and I've been lacking the latter. For instance, I just got an inquiry on Smalltalk that reads:

I received a 3-6 month contract inChicagofor a Smalltalk Programmer withDelphiexperience. This is a small company in the financial industry that\ufffds looking for a contractor to come in for some maintenance and enhancement work. The program works on aDelphidatabase so the candidate MUST have working experience withDelphi. Part time telecommuting MAY be a possibility if you are willing to be flexible on your rate requirements.

Other requirements are WinBatch, Java, C++, Tomcat/Catalina and working knowledge of Windows 2000/NT.

WTF?

Anyhow, since the squeak vm is really easy to port and open, some embedded systems have been made with it - like palmtops. Otherwise there are a few places using Seaside - the web app lib. I know that whistler.com is working on building some of their local booking system in Seaside.

So as a resume builder - I don't think its a biggie. But as a programming lab its cool. And there are a lot of cool learning projects for kids at squeakland.org