Given
<foo>
<bar baz="Hello, World!">
</foo>
How do I all but the last 4 characters of @baz? One of my attempts was:
/foo/bar/@baz[substring( ., 0, -4 )]
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3 Answers
Use:
substring(/foo/bar/@baz, string-length(/foo/bar/@baz)-3)
Do note the 3 in the expression.
The following is wrong:
substring(/foo/bar/@baz, string-length(/foo/bar/@baz)-4)
because this returns the last 5 characters of the string value of the baz attribute.
1 Comment
Dimitre Novatchev
@Volkirith, The phrase in the question "How do I all but the last 4 characters" is ambiguous -- maybe it meant "How do I skip all but the last 4 characters" in which case the answer is correct. We can't know for sure, but the fact that the answer was accepted kinda confirms this guess. Of course, had it been the other way around (the meaning you suggest in your comment). the solution is easy enough:
substring(/foo/bar/@baz, 1, string-length(/foo/bar/@baz)-3) Do note that recently moderators and other people have been "correcting" questions -- leading to this mess :(try this:
substring-before(/foo/bar/@baz,"rld!")
Comments
That's actually not so bad, but IIRC substring doesn't like negative indices. I tried
substring(/foo/bar/@baz, string-length(/foo/bar/@baz)-4)
Which gave me the expected result.
