Does Clojurescript have a trace function?
On Sat, Jun 2, 2012 at 5:26 PM, Softaddicts <lprefonta...@softaddicts.ca>wrote:
> clojure.tools.trace beats println by far (biased advice, I maintain
> it....:)))
> It's also easier to segregate between debug and normal output in the code.
>
> You can enable/disable fn tracing dynamically from the REPL for all fns in
> a given
> namespace.
>
> I seldom use a debugger. When I do it's to dive in the clojure runtime.
>
> The REPL and trace tool meet my needs most of the time.
>
> The trick is to avoid having huge chunks of code stuffed
> in a single fn. It makes life harder. No dumb rule of thumb here (have no
> more
> than xx lines per fn, blabla, ...).
>
> Just make sure you have testable fns of reasonnable scope.
>
> With the trace output, you can then isolate the culprit and test it
> standalone with
> its input arguments captured from the trace (cut & paste).
>
> Luc P
>
> > On Sat, Jun 2, 2012 at 2:34 PM, Moritz Ulrich
> > <ulrich.mor...@googlemail.com> wrote:
> > > I think one important point here is that you use two different data
> > > structures to hold the same kind of data.
> >
> > Points and deltas are not the "same kind of data". Yes, they both have
> > x/y/z values but their meaning is different. Perhaps {:point [x y z]}
> > and {:delta [x y z]} might be a better choice (combining the vector
> > approach you suggest while still distinguishing the 'types' that the
> > OP wants)?
> >
> > > If you're using emacs and Slime, there's a full-blown debugger
> > > integrated in swank-clojure. It features breakpoints, watches, etc.
> >
> > True, and it's very powerful.
> >
> > > When I encounter such problems, I usually just throw in one or two
> > > println statements printing the parameters. This way it's easy to
> > > check if wrong values are passed.
> >
> > Perhaps clojure.tools.trace would be easier?
> >
> > https://github.com/clojure/tools.trace
> >
> > (I keep meaning to switch to using this instead of just adding println
> > statements!)
> >
> > > Adding some asserts is helpful too: In your case it would be wise to
> > > check at the start of the `add' function if `delta' really has the
> > > keys #{:dx :dy :dz}.
> >
> > Yes, :pre / :post would be another useful technique here! Good
> suggestion!
> > --
> > Sean A Corfield -- (904) 302-SEAN
> > An Architect's View -- http://corfield.org/
> > World Singles, LLC. -- http://worldsingles.com/
> >
> > "Perfection is the enemy of the good."
> > -- Gustave Flaubert, French realist novelist (1821-1880)
> >
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> Softaddicts<lprefonta...@softaddicts.ca> sent by ibisMail from my ipad!
>
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