Useful functions about mal HOT 5 CLOSED

Look at the examples subdir for some, well, examples, like Clojure-like protocols.

For a bunch of more Mal code (like a Mal tokenizer and parser) you can look at my malc repository, though I can't recommend specific reusable functions on top of my head.

@kanaka and I previously discussed adding a lib subdir with core.mal and a bunch of other stuff (even move tokenizer.mal from malc). It hasn't happened (yet).

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@ktodyruik yes, please feel free to send pull requests that add useful functions to the examples/ subdir. At some point, we'll re-organize to move more lib/contrib related stuff to a separate directory. If you include a test file in the same directory for now (and using the standard format), that would be great too.

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@ktodyruik also a lot of Clojure functions and macros should port to mal fairly easily as long as they don't rely on protocols or lazy sequences. The semantics and data structures in mal are modeled after Clojure.

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@kanaka Could you elaborate on what you meant by "If you include a test file in the same directory for now (and using the standard format), that would be great too." Thanks.

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The test syntax I'm referring to is that used in tests/*. And you can run runtest.py directly to run mal tests. For example, consider you defined a sumdown function in examples/sumdown.mal:

(def! sumdown (fn* (N) (if (> N 0) (+ N (sumdown  (- N 1))) 0)))

The you could define a test file test_sumdown.mal like this:

(load-file "sumdown.mal")

(sumdown 0)
;=>0
(sumdown 1)
;=>1
(sumdown 5)
;=>15

You can now run those tests using a specific implementation like this:

mal/examples $ ../runtest.py test_sumdown.mal ../js/run
Started with:
Mal [javascript]

TEST: (load-file "sumdown.mal") -> ['',*] -> SUCCESS
TEST: (sumdown 0) -> ['',0] -> SUCCESS
TEST: (sumdown 1) -> ['',1] -> SUCCESS
TEST: (sumdown 5) -> ['',15] -> SUCCESS

TEST RESULTS (for test_sumdown.mal):
    0: soft failing tests
    0: failing tests
    4: passing tests
    4: total tests

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