structured dict macro

[off-by-one]

I found the default dict syntax a bit hard to read, but the macros made it really easy to introduce custom syntax. You can do it with a one-liner (fixed thanks to Kodiologist):

(<defmacro/deftag> <name> [d] `{~@(do (setv l []) (for [(, k _ v) d] (+= l [k v])) l)})

And can apply the macro to {(1 => 2) (3 => 4)} (or if you prefer Python style, {(1: 2) (3: 4)}).

I like deftag % (or defmacro "#%" in 1.0), since it gives you #%{(1 => 2) (3 => 4)}, which is similar to Perl and also suggestively close to the set notation.

[Kodiologist]

I think your code will do the wrong thing if there are collection-type models in the arguments, as in {(1 => 2) (3 => [4 5 6])}, because flatten is recursive.

For what it's worth, I like to put two spaces between key-value pairs in dictionaries, so it's clearer what belongs to what:

(dict  :a 1  :b 2  :c 3)
{1 10  2 20  3 30}

[gilch]

#1069