Comments on: Clojure – good coding guidelines

By: Siva Jagadeesan

Siva Jagadeesan — Tue, 14 Dec 2010 00:51:08 +0000

Hi Ray:

It makes sense to de-structure in arg list when you want to explain to caller what kind of data the function is expecting. When you do not need to be explicit, it is better not to have de-structure in arg list as it will make it difficult to read the code.

– Siva Jagadeesan

By: Ray Miller

Ray Miller — Mon, 13 Dec 2010 11:21:13 +0000

What’s the rationale for destructuring with let rather than in the arg list? Isn’t the latter more succinct?

By: Siva Jagadeesan

Siva Jagadeesan — Sat, 11 Dec 2010 21:44:24 +0000

These are just guidelines … if you think using “when” only when there is side effect works better for you, go for it..

snow flakes are going to be till jan 4th

By: bsteuber

bsteuber — Sat, 11 Dec 2010 12:02:51 +0000

Sorry, I meant to write “side effects”
I thought I remember it from Common Lisp, but everything I googled now agrees with you so either I remember it wrong or it was just one or two authors. So I will now use when even without side effects…

P.S. Man, your blog just made me think my monitor’s damaged =)

By: Siva Jagadeesan

Siva Jagadeesan — Fri, 10 Dec 2010 16:48:38 +0000

The reason for if-rule is it makes it easy to read the code. By looking at code, we could easily differentiate when there is “else” clause and when there is no “else” clause. Could you explain what do you mean by “wide effects”?

By: bsteuber

bsteuber — Fri, 10 Dec 2010 09:53:04 +0000

Nice, one remark though:
A rule I know is “use when if you’re doing wide effects only” which contradicts your if-rule. So which one is better?