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change calc.mad to use util.mad

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This commit is contained in:
Pekka Laiho 2020-12-22 10:17:35 +07:00
parent b1c1eb5cf1
commit 45bc9ec2ef
1 changed files with 5 additions and 2 deletions
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7
mad/calc.mad
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@ -9,6 +9,9 @@
;; This script should be executed directly, not inside the repl.
;;
;; Load some utility functions we use
(load (str __DIR__ "util.mad"))
;; Define commands
(defn cmdAdd (args) (apply + args))
(defn cmdDiv (args) (apply / args))
@ -31,7 +34,7 @@
;; Find the first command which starts with the given name, or null
(defn findCmd (name)
(if (empty? name) null
(if (null? name) null
(let (matches (filterh (fn (v k) (prefix? k name)) cmdMap))
(if (empty? matches) null
(get matches (first (keys matches)))))))
@ -39,7 +42,7 @@
;; Split input by spaces, find command that matches the first word
;; and call it, giving the rest of the words as arguments.
(defn parseInput (inp)
(let (words (split " " inp) cname (first words) args (tail words) cmd (findCmd cname))
(let (words (str-first-rest inp) cname (first words) args (second words) cmd (findCmd cname))
(if (null? cmd) "Unknown command, try 'help'."
(if (< (len args) (second cmd)) (str "Give at least 2 arguments to " cname ".")
((first cmd) args)))))