Print Page - Setting up hash items at once

Title: Setting up hash items at once
Post by: vetelko on August 15, 2017, 02:39:33 AM

Hi guys,

is it possible to set hash items at once in hash definition?

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;; this works
(define cities:cities)
(cities "ny" "new york")
(cities "sf" "san francisco")
(println (cities "sf"))

;; this not
(define cities:cities '(
    ("ny" "new york")
    ("sf" "san francisco")))

(println (cities "sf"))

Title: Re: Setting up hash items at once
Post by: varbanov on August 18, 2017, 01:19:31 AM

Hi,

Try

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(define cities:cities)         ; creates the default functor
(cities '(("ny" "new york") ("sf" "san francisco")))        ; the functor adds the data
(cities)

s.v.

Title: Re: Setting up hash items at once
Post by: rrq on August 18, 2017, 03:38:11 PM

And you can of course combine it into a single phrase like

Code Select Expand
((or (define cities:cities) cities)
  '(("ny" "new york")  ("sf" "san francisco")))

but it's not very intelligible.

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Forum => newLISP in the real world => Topic started by: vetelko on August 15, 2017, 02:39:33 AM