Re: Regex to find case differences

On 2015-02-06 12:45, David Fishburn wrote:
>> :g/^\(\S*\)\s\+\<\1\>/sil! >
>
> Thanks Tim, I didn't release we could use the \1 that way. Once
> again I just assumed it could only be used in the replacement part.

I think I stumbled across it on a "hey, I wonder if this works" and
found that it did, so it's been in my tool-bag since then. It's
documented at ":help /\1" with some caveats at ":help /\@<="

> To force the case sensitivity (regardless of the ignorecase
> setting) we can just add:
> :g/\C^\(\S*\)\s\+\<\1\>/sil! >

Yes, that would have been wise to include, as I almost never fly with
'ignorecase' set, so my mind only thinks about it when I want to
force case-insensitivity with "\c".

> And to remove the ones that are identical (instead of indenting):
> :g/\C^\(\S*\)\s\+\<\1\>/d
>
> And to reverse that (i.e. keep only the ones that do match):
> :v/\C^\(\S*\)\s\+\<\1\>/d

As usual, any Ex command will do here. :-)

-tim



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