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Check if its number

3 posts · 1967 views

vasko

#1 Mon Mar 21, 2011 11:49 pm

I need help with function that checks if all elements are numbers

for example:

(checkn '(1 2 3 a 4 5)) -> ()
(checkn '((1 2) 3 ((4 (1 2) a) 6 b))) -> ()
(checkn '((1 2) 3 ((4 (1 2) a) 6 b))) -> t

nuntius Administrator

#2 Tue Mar 22, 2011 1:11 am

Re: Check if its number

Look up NUMBERP in the Numbers Dictionary.

Chapters 5 and 6 each have solutions for using this on lists of data.

vasko

#3 Tue Mar 22, 2011 10:22 am

Re: Check if its number

thank you