howto non_existance- check?
[1/2] from: riachtchenko::docutec::de at: 14-Dec-2000 18:30
Hi all,
sorry, i certainly could 've seen the solution -
but coud't find it now ;-)
>> f: func [w ] [either [ value? 'w ] [ do 'w][print "no way..."]]
>> value? 'm
== false
>> x
== 10
>> f x
== 10
>> f m
** Script Error: m has no value.
** Where: f m
>> f 'm
== m
>>
thank you
Sascha
[2/2] from: al:bri:xtra at: 15-Dec-2000 7:14
Sascha wrote:
> sorry, i certainly could 've seen the solution - but couldn't find it now
;-)
> >> f: func [w ] [either [ value? 'w ] [ do 'w][print "no way..."]]
> >> value? 'm
<<quoted lines omitted: 10>>
>> f: func ['w] [either value? w [do w][print "no way..."]]
>> f xyz
no way...
>> z: does [print "hi!"]
>> f z
hi!
Andrew Martin
Yes, way...
ICQ: 26227169 http://members.nbci.com/AndrewMartin/
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