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 | Pack onepointfour_basics -- prolog/stringy_length.pl |
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- stringy_length(+Stringy, ?Length)
- Determine the length of Stringy, which may be an atom or a string.
This is not really needed a atom_length/2 and string_length/2 work for both strings and atoms, but it removes the specificity of calling atom_length/2 or string_length/2.
Length may be instantiated to a integer. In that case, the predicate verifies the length of Stringy against Length.
This predicates behaves softly, i.e. preferentially fails on bad input.
- stringy_length(+Stringy, ?Length, @Tuned)
- As stringy_length/2, but setting Tuned to
hardwill make the predicate throw if Length is bound but negative. - stringy_length_type(+Stringy, ?Length, ?Type)
- As stringy_length/2, but additionally takes the Type of
the stringy, which is unified with one of
atomorstring. - stringy_length_type(+Stringy, ?Length, ?Type, @Tuned)
- As stringy_length_type/3, but setting Tuned to
hardwill make the predicate throw if Type is bound but not one ofstring,atom(and also if Length is bound but negative).