On 23 Oct 2005, at 11:23, Dave Cragg wrote:
I assumed that Revolution would do what it promised and didn't
check this.
Try
answer replaceText("A C","^ *","")
I get "C", which obviously is not correct.
If I remove the "*", I get "A C"
This may be a bug. (I'm not sure.)
To expand on why I wasn't sure if it was a bug or not.
A regular expression consisting of a single character (or single
character set) followed by the * (zero or more matches) quantifier
will always match. Therefore it's not really a useful construction.
If it always matches, replaceText will presumably always try to
replace the matched text. But in this case, it has matched an empty
string, so I guess the engine is confused about where the replacement
should be made. As far as I know, replaceText always works when the
above construction is used in combination with another expression
(e.g yx*, x*y, yx*z), so if it is a bug, I don't think it can be
considered a serious one.
answer replaceText("A C","^ +","")
The above works because the match can fail, in which case no
replacement is made.
Cheers
Dave
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