Arc Forum | (mac nobj args " Creates a table from the list of variables passed to it; ...

Arc Forum

5 points by almkglor 6013 days ago | link | parent

  (mac nobj args
    " Creates a table from the list of variables passed to it; each variable's
      name is keyed to its value.  E.g. if x = 10 and y = -10, then (nobj x y)
      results in #hash((y . -10) (x . 10)).
      See also [[obj]] [[table]] "
    `(obj ,@(mappend [list _ _] args)))

1 point by absz 6013 days ago | link

Even better, then :) And I definitely need to remember that this exists.

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3 points by almkglor 6013 days ago | link

^^ Of course you don't: just tell Arc about what you do remember, and it'll tell you more about related things you might want to look at too:

  arc> (help map)
  (from "arc.arc")
  [fn]  (map f . seqs)
   Applies the elements of the sequences to the given function.
      Returns a sequence containing the results of the function.
      See also [[each]] [[mapeach]] [[map1]] [[mappend]] [[andmap]]
      [[ormap]] [[reduce]]

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6 points by absz 6013 days ago | link

I know, but when was the last time you thought you needed help with map of all things? :)

Actually, aha! I added this to the bottom of ~/.arcshrc

  (let func (random-elt:keys help*)
    (prn "Documentation for " func " " (helpstr func)))

Now whenever I start arc, it will print, e.g.,

  Documentation for saferead (from "arc.arc")
  [fn]  (saferead arg)
   Reads an expression, blocking any errors. 
  
  Use (quit) to quit, (tl) to return here after an interrupt.
  arc>

And thus hopefully I will learn something :)

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