November 2003
Beginner to intermediate
480 pages
15h 3m
English
contains, does not contain, is in, is not in — containment
string1 contains string2
string2 is in string1
list1 contains list2
list2 is in list1
record1 contains record2
record2 is in record1
The is in synonyms reverse the operand order of
the contains synonyms—that is, with
is
in, the second operand comes
before the first operand (as deliberately shown in the syntax
listings). This is relevant in the rules for implicit coercions.
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