James Ladd shot me a link to this in twitter the other day, and I think it is a great new way of seeing and explaining 'Tell, Don't Ask.' The gist of it is...
I was thinking it would be cool to work through something along the lines of http://tinyurl.com/amt96g as a community. Or at least have some newbies like me...
wow. that was very interesting! after our talk during NDC, I think this is the same kind of "hint" you were looking for in the testability space. perhaps this...
While reading throught the article I was wondering, if jdepend could be extended to provide east, west, north, south compass directions for my java packages....
2009/7/4 Andrew Wagner <wagner.andrew@...> ... Me and Simone (from another mailing list) did som remote pair programming experiments earlier this year....
Olof Bjarnason
olof.bjarnason@...
Jul 4, 2009 9:03 pm
31278
Oh interesting. I wasn't thinking of something real-time like this. I was more thinking along the lines of participation by checking into version control, with...
The style of coding used in the examples also brings the sequential code into a form that can be more easily made concurrent. I'm a fan of pipelining some...
Hi Michael, Looks interesting, but I wonder what consistent usage would do to a code base. In the account example, wouldn't Account's interface grow huge and...
Looks like an interesting metaphor, and certainly worth considering, but I'd apply it with caution. For example, suppose I want to display the balance in a...
On Sun, Jul 5, 2009 at 2:19 PM, Michael ... I vote for that. ;-) ... Most of the "mainstream" languages (e.g. Java, C#, C++, etc.) don't use this style in most...
Markus, I guess it depends on what it looks for. I think it would be very easy to compute the ratio of void to non-void methods, but actually computing that...
Rick, I like the style also, but I also like the functional style which is all "ask, ask, ask." I find it tough to pick between them sometimes. Michael ... --...
Kim, It really depends on what we say that the style is, really. "Tell, Don't Ask" as a general statement is true about many codebases, but most have their...
... Yes this is an interesting observation; while east oriented code makes you want to hide state, functional languages asks you to be very explicit about your...
Olof Bjarnason
olof.bjarnason@...
Jul 6, 2009 5:48 am
31289
... "lego-like" is an awesome analogy! I'm going to steal that ;-)...
Hi Michael, Nice observation about the correlation between east-west (tell-ask) and north-south (upper layers-lower layers), I haven't seen it myself, but I...
I've given the east-west direction of code some more thought. East-oriented code is more testable it is claimed. But why is that the case..? Is not because...
Olof Bjarnason
olof.bjarnason@...
Jul 6, 2009 8:49 am
31292
Hi Adam, ... Interesting perspective. I don't think that interfaces have a natural reading of either tell or ask. I enjoy TDDing with JMock2 in which I define...
... I admit you might have to squint a little to see it that way. I see the interface as "asking" because the purpose of the interface is to inform me about...
It's awhile since I used Haskell seriously, in which I was happy writing in an ask style (and sometimes lazily, which can be very handy). But I also used a lot...
Hi Olaf, I think of the difference between tell and ask with respect to testing values as being "symmetrical": o With ask, we check the resulting value of a...
Thanks for posting the link Michael, very nice article that describes a concept I've known but never really thought about. I do quite a bit of east flowing...
Although my belief that pairing is the best way to learn TDD, I've been thinking about other ways to introduce people to TDD. I've never thought about remote...
Hi All, I'm very glad that there is a discussion around this topic as I think Tell-Don't-Ask / East/ Right is a very important design principle, and a key to...
... Perhaps Demeter's Helpful Suggestion? ... Hmm, our application domain, CAD, is all about entities (geometric objects) and values. In this field, following...
Interesting post, James. Raises lots of questions. ... Me, too often. I try to minimize this by forcing my code to operate at the single object level. How...
Hi Alan, ... It's not the law so much as the reference to a Greek goddess I have trouble with. I can't see anything here to help me with software design: ...
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