Comments for 3 + 4 http://blog.3plus4.org The neighbourhood of 7 Mon, 28 Nov 2011 19:21:45 +0000 hourly 1 http://wordpress.org/?v=3.2.1 Comment on Elements of Goodthink: Setter Sends by Brian T. Rice http://blog.3plus4.org/2011/11/10/elements-of-goodthink-setter-sends/comment-page-1/#comment-2004 Brian T. Rice Mon, 28 Nov 2011 19:21:45 +0000 http://blog.3plus4.org/?p=184#comment-2004 Slate provides a special class of binary operator which is expanded like a Lisp macro. So := and ::= (immutable binding) and =:= (pattern match) expand into the appropriate message sends, with the special operators themselves having the precedence that "we expect" from assignment. Having this be an extensible class has been helpful, and having them be macros means that they're just performing normal source operations which usually don't violate encapsulation. Slate provides a special class of binary operator which is expanded like a Lisp macro. So := and ::= (immutable binding) and =:= (pattern match) expand into the appropriate message sends, with the special operators themselves having the precedence that “we expect” from assignment. Having this be an extensible class has been helpful, and having them be macros means that they’re just performing normal source operations which usually don’t violate encapsulation.

]]> Comment on A Taste of Nested Classes, part 1 by Vassili Bykov http://blog.3plus4.org/2008/12/04/a-taste-of-nested-classes-part-1/comment-page-1/#comment-1843 Vassili Bykov Fri, 11 Nov 2011 16:11:49 +0000 http://blog.3plus4.org/?p=86#comment-1843 Thank you, Damien! I fixed it in the post too. Thank you, Damien! I fixed it in the post too.

]]> Comment on A Taste of Nested Classes, part 1 by Damien Cassou http://blog.3plus4.org/2008/12/04/a-taste-of-nested-classes-part-1/comment-page-1/#comment-1841 Damien Cassou Fri, 11 Nov 2011 12:21:39 +0000 http://blog.3plus4.org/?p=86#comment-1841 The correct link to the "On the Interaction of Method Lookup and Scope with Inheritance and Nesting" article is http://bracha.org/dyla.pdf. The correct link to the “On the Interaction of Method Lookup and Scope with Inheritance and Nesting” article is http://bracha.org/dyla.pdf.

]]> Comment on Elements of Goodthink: Setter Sends by Maurice Rabb http://blog.3plus4.org/2011/11/10/elements-of-goodthink-setter-sends/comment-page-1/#comment-1838 Maurice Rabb Fri, 11 Nov 2011 05:22:22 +0000 http://blog.3plus4.org/?p=184#comment-1838 Hi Vassili, many moons ago when, I present this exact idea (including Travis' extension) when I was working on Microlingua. Great minds think a like. ;-) Makes me want to pull all that stuck back out. I need to check out your blog more often. :-) Hi Vassili, many moons ago when, I present this exact idea (including Travis’ extension) when I was working on Microlingua. Great minds think a like. ;-) Makes me want to pull all that stuck back out. I need to check out your blog more often. :-)

]]> Comment on Elements of Goodthink: Setter Sends by Vassili Bykov http://blog.3plus4.org/2011/11/10/elements-of-goodthink-setter-sends/comment-page-1/#comment-1836 Vassili Bykov Fri, 11 Nov 2011 00:09:14 +0000 http://blog.3plus4.org/?p=184#comment-1836 No, the syntax is explicitly <identifier>:: <expression>. No receiver, no stacking of colons, and no multiple keywords. No, the syntax is explicitly <identifier>:: <expression>. No receiver, no stacking of colons, and no multiple keywords.

]]> Comment on Elements of Goodthink: Setter Sends by Travis Griggs http://blog.3plus4.org/2011/11/10/elements-of-goodthink-setter-sends/comment-page-1/#comment-1835 Travis Griggs Thu, 10 Nov 2011 23:00:41 +0000 http://blog.3plus4.org/?p=184#comment-1835 I think the stacking of colons is cool. Is it arbitrary? IOW can I use it on any message? And can I stack them as deep as I want? Could I hypothetically do something like sequence add::: Customer name:: String with: 'Me' ? Or is it just for setter sends? I think the stacking of colons is cool. Is it arbitrary? IOW can I use it on any message? And can I stack them as deep as I want? Could I hypothetically do something like

sequence add::: Customer name:: String with: ‘Me’

? Or is it just for setter sends?

]]> Comment on Selectors as Blocks by For.example » Blog Archive » Cyclomatic Complexity in Languages with Closures http://blog.3plus4.org/2007/03/27/selectors-as-blocks/comment-page-1/#comment-1736 For.example » Blog Archive » Cyclomatic Complexity in Languages with Closures Wed, 11 Nov 2009 12:08:53 +0000 http://blog.3plus4.org/2007/03/27/selectors-as-blocks/#comment-1736 [...] if you are using selectors as blocks you might even get multiple path without a block, as for [...] [...] if you are using selectors as blocks you might even get multiple path without a block, as for [...]

]]> Comment on Selectors as Blocks by Adrian http://blog.3plus4.org/2007/03/27/selectors-as-blocks/comment-page-1/#comment-1735 Adrian Wed, 11 Nov 2009 09:38:58 +0000 http://blog.3plus4.org/2007/03/27/selectors-as-blocks/#comment-1735 Cool stuff Vassili. You might even use the compiler to get rid of the manual #perform: in the blocks and thus speed up loops. Also nice is to use the same for sort blocks, Symbol >> asSortBlock "Answer a sort block, which evaluates this symbol for both arguments and compares the resulting values" | stream | stream := (String new: self size * 2 + 14) writeStream. stream nextPutAll: '[:a :b|a '; nextPutAll: self; nextPutAll: '<=b '; nextPutAll: self; nextPut: $]. ^Compiler evaluate: stream contents Cool stuff Vassili. You might even use the compiler to get rid of the manual #perform: in the blocks and thus speed up loops. Also nice is to use the same for sort blocks,

Symbol >> asSortBlock
“Answer a sort block, which evaluates this symbol for both arguments
and compares the resulting values”
| stream |
stream := (String new: self size * 2 + 14) writeStream.
stream
nextPutAll: ‘[:a :b|a ';
nextPutAll: self;
nextPutAll: '<=b ';
nextPutAll: self;
nextPut: $].
^Compiler evaluate: stream contents

]]> Comment on Currying in Smalltalk by Steve Taylor http://blog.3plus4.org/2007/03/23/currying-in-smalltalk/comment-page-1/#comment-1734 Steve Taylor Thu, 29 Oct 2009 23:52:42 +0000 http://blog.3plus4.org/2007/03/23/currying-in-smalltalk/#comment-1734 Previous comment by 'Walter Arlene' is spam (mouse over their name and see their url is a link to a classified ad site and their post is content free.) Also - excellent post on currying. I'm always blown away how Smalltalk (and some other dynamic languages, to be fair) can be made to do things they were never designed to do with minimal effort. Previous comment by ‘Walter Arlene’ is spam (mouse over their name and see their url is a link to a classified ad site and their post is content free.)

Also – excellent post on currying. I’m always blown away how Smalltalk (and some other dynamic languages, to be fair) can be made to do things they were never designed to do with minimal effort.

]]> Comment on Hopscotch presentation video from lang.net by Rob Grainger http://blog.3plus4.org/2009/04/22/hopscotch-presentation-video-from-langnet/comment-page-1/#comment-1730 Rob Grainger Fri, 18 Sep 2009 00:19:31 +0000 http://blog.3plus4.org/?p=175#comment-1730 I neglected to say, though, that the Hopscotch IDE is otherwise in many senses massively superior. The Eiffel IDE suffers massively from panelitis, and it offers a very strange development model to people coming from either the dynamic language or static language approach. I neglected to say, though, that the Hopscotch IDE is otherwise in many senses massively superior. The Eiffel IDE suffers massively from panelitis, and it offers a very strange development model to people coming from either the dynamic language or static language approach.

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