NAME
multiset - a set of values

SYNTAX EXAMPLE
(< 1, 7, 8, 9 >)

DESCRIPTION
A multiset is basically a mapping without data values, when indexing a multiset 1 willl be returned if the index is present, zero otherwise.

Here follows a list of operators that applies to multisets: In this list a and b is used to represent a multiset expression:

a + b summation ( (<1>) + (<2>) returns (<1,2>) )
a - b subtraction, returns a copy of a with all values that are present in b removed.
a & b intersection, return a multiset with all values that are present in both a & b.
a | b union, return a multiset with all values that are present in a or b, differs from summation in that values that are present in both a and b are only returned once.
a ^ b xor, return a multiset with all indices that are present in a or b but not in both.
a == b returns 1 if a is the same multiset as b, same size and values is not enough.
a != b returns 1 if a is the same multiset as b, same size and values is not enough.
! a boolean not, returns 0
a[c] indexing, returns 1 c is present in the multiset a.
a[c]=d setting, if d is true, c is added to the multiset if it is not present already. If d is false, it is removed if it is present.

KEYWORDS
types

SEE ALSO
mapping, array, indices and sizeof

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