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Line 1,199: variable CAT is defined, value=<<< </pre> =={{header\|Ruby}}== <lang ring> see isnull(5) + nl + # print 0 isnull("hello") + nl + # print 0 isnull([1,3,5]) + nl + # print 0 isnull("") + nl + # print 1 isnull("NULL") # print 1 </lang> =={{header\|Ruby}}==

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