How do I select elements that have two attributes?
I can do
@name | @area
which is "name or area", but how do I do "name and area"?
+6
A:
Well, don't use @name | @area - it's not 'or', it's a join which happens to work incidentally.
For 'or', do foo[@name or @area].
For 'and', do foo[@name and @area].
alamar
2009-05-26 09:17:09
I might call using "@name | @area" that way roundabout, but not incidental. Effectively, it says "does this expression return any results?" The answer of course is yes if either or both attributes are present. It's a reasonable alternative for expressing the same condition.
Evan Lenz
2009-05-26 18:18:21
+2
A:
XPath does provide you with an and operator which can be used to evaluate multiple conditions using predicates:
Possibles:
//MyElement[@name][@area]
//MyElement[@name and @area]
Cerebrus
2009-05-26 09:19:22
Well, because it's ugly? I can't think of a more valid reason, frankly :)
alamar
2009-05-26 09:36:55
Heh, I often prefer multiple predicates over explicit logical operators ("and"). I suppose it's a matter of taste. Depending on how complex the pattern or expression is, I'll also break it up into multiple lines and align one predicate above the next one.
Evan Lenz
2009-05-26 18:13:12