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occurrences(++Value, +Vars, ?N)

The value Value occurs in Vars N times
Value
Atomic term
Vars
Collection (a la collection_to_list/2) of atomic terms or domain variables
N
Variable or integer

Description

The value Value occurs in Vars N times. Operationally: N gets updated to reflect the number of possible occurrences in the collection. Collection elements may get instantiated to Value, or Value may be removed from their domain if required by N.

See Also

element / 3, atmost / 3, lists : collection_to_list / 2