https://bz.apache.org/ooo/show_bug.cgi?id=107619
--- Comment #20 from Kay <ksch...@apache.org> --- (In reply to mikekaganski from comment #19) > (In reply to Kay from comment #18) > > (In reply to Francis C. Costero from comment #17) > > > Find: ([^ ]*)[ ]*([^ ]*) > > > > Match zero or more occurences of a space following the beginning (grouping > > 1), followed by zero or more occurrences of "space", followed by match > > zero or more occurrences of a space following the beginning of the line > > (grouping 2). > > Incorrect. [^ ] doesn't mean "a space following the beginning of the line", > it's "Any character except space" syntax. Here "space" means character 0x20, > not "any whitespace character" like [:space:], of course. > > If it were "a space following the beginning of the line", then in any of the > following examples both groups would be empty (there's no lines starting > with space). > > Thus, this means (taking greedy processing of "*" into account): put as much > non-space characters as possible into the first grouping (possibly empty if > the first char is space), THEN skip any spaces (if present), THEN take as > much as possible of non-space characters LEFT into the second grouping > (maybe zero if no other characters after those spaces). Anyway, first and > last groupings represent DIFFERENT groups of characters, they may have > identical value only if those different groups have identical characters in > them. > > > > Replace: $1$2 > > > I get the following after clicking Replace All > > > 987987 > > > > This is correct. In this case $1 and $2 are identical because there is zero > > or no occurrence of the "intervening" space. > > Incorrect. In this case $1 MUST be "987", and $2 MUST be "". > > > > ab > > > > This is correct. There was an intervening space. > > OK. > > > > aa > > > > This is correct and the same as the "987" string case. > > No, this is INCORRECT and the same as the "987" string case. OMG! I stand corrected! you are right, mikekaganski! -- You are receiving this mail because: You are on the CC list for the issue. You are the assignee for the issue.
