Filter two file extension using =

Question

How can I list only two file types (by their extensions) in a list using =?

Thank you

Answer 1

Example for *.c and *.h files:

=\.(c|h)$

Comments

In VIFM to test the local filter =, I would like to know if the regex below is correct. Thank you in advance for your help and valuable advice. I took it from VIM editor

^					matches start of line

$					matches end of line

()					grouping Expressions

|					alternation operator (logical OR).

\a matches alphabet character, short-cut for [a-zA-Z]
alphabetic character		        abcd...xyz    but not    éäöü

\A matches other than alphabet [^a-zA-Z]
non-alphabetic character            éäöü [space]   but not    abcd...xyz

\d matches digit character [0-9]

\D matches other than digit [^0-9]

\l matches lowercase alphabets [a-z]

\L matches other than lowercase alphabets [^a-z]

\s matches white-space characters space and tab

\S non-whitespace character

\u matches uppercase alphabets [A-Z]

\U matches other than uppercase alphabets [^A-Z]

\x matches hexademical character [0-9a-fA-F]

\X matches other than hexademical [^0-9a-fA-F]

\w matches any alphanumeric character or underscore [a-zA-Z0-9_]

\W match other than alphanumeric character or underscore [^a-zA-Z0-9_]

[:alnum:] letters and digits

[:alpha:] letters

[:blank:] space and tab characters

[:cntrl:] control characters

[:digit:] decimal digits

[:graph:] printable characters excluding space

[:lower:] lowercase letters (all letters when
ignorecase is used)

[:print:] printable characters including space

[:punct:] punctuation characters

[:space:] whitespace characters

[:upper:] uppercase letters (all letters when
ignorecase is used)

[:xdigit:] hexadecimal digits

[:return:] the CR character

[:tab:] the Tab character

[:escape:] the Esc character

[:backspace:]		the BS character

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Some of it will work in Vifm, but not everything. Unlike Vim Vifm doesn't have its own regexp implementation and uses extended regular expressions of POSIX, so see man 7 regex and add Vim's \C and \c to that (as mentioned in the docs).

Some [: ... :] will work. Special characters like ^$*+|.?[^]{,} work. Somehow \s\S\w\W also seem to work (I didn't notice this before, may be a recent addition), but others still don't (although Vifm could probably replace them with equivalent sequences).

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@xaizek thanks, I understand. What is your point of view about implementing an history, by pressing the up arrow or down arrow, for the local filter = like in :

: command-line mode with colon

or

/ search forward with slash

or

? search backward with question mark

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Local filter already has history. Yours may be empty if 'vifminfo' doesn't include fhistory value.