Revision as of 08:08, 30 May 2019 (view source) rosettacode>Vorov2 (Added Dyalect programming language) ← Older edit		Revision as of 00:46, 31 October 2019 (view source) rosettacode>Yuriy Chumak (added Ol) Newer edit →
Line 1,361: "abcd" isNull : testNull { \| a \| a ifNull: [ "Variable value is null" println ] ;</lang> =={{header\|Ol}}== Ol has no null object in task meaning sense. To indicate the "unassigned" variable state typically used #false because this is only value that triggers the 'unless' and 'if not'. The builtin null and #null (that a same) means "an empty list". Important note: in contrast with CL the null means #true in 'if' statement! =={{header\|ooRexx}}==

Null object (view source)