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fields/ library predicate, to return empty fields.

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Costa Vitor
2009-07-15 17:30:27 -05:00
parent 0b85333018
commit a69a34f3a5
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docs/yap.tex
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@@ -8854,6 +8854,37 @@ S = ["Hello","I","am","free"] ?
no
@end example
@item split(+@var{Line},-@var{Split})
@findex split/2
@snindex split/2
@cnindex split/2
Unify @var{Words} with a set of strings obtained from @var{Line} by
using the blank characters as separators.
@item fields(+@var{Line},+@var{Separators},-@var{Split})
@findex fields/3
@snindex fields/3
@cnindex fields/3
Unify @var{Words} with a set of strings obtained from @var{Line} by
using the character codes in @var{Separators} as separators for
fields. If two separators occur in a row, the field is considered
empty. As an example, consider:
@example
?- fields("Hello I am free"," *",S).
S = ["Hello","","I","am","","free"] ?
@end example
@item fields(+@var{Line},-@var{Split})
@findex fields/2
@snindex fields/2
@cnindex fields/2
Unify @var{Words} with a set of strings obtained from @var{Line} by
using the blank characters as field separators.
@item glue(+@var{Words},+@var{Separator},-@var{Line})
@findex glue/3
@snindex glue/3