Substitution of a particular letter in all combinations of positions in word (see inside)

Doctrin has asked for the wisdom of the Perl Monks concerning the following question:

Hello everyone! Could you please tell me how to do the following. Say, we have a word ferber. I wanna substitute "e" with "a" in all combinations, so that I have following words:

farber

ferbar

farbar

Maybe, there is even a "one-line" solution? Thanks in advance

Comment on Substitution of a particular letter in all combinations of positions in word (see inside)

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Re: Substitution of a particular letter in all combinations of positions in word (see inside) by LanX (Saint) on Jan 09, 2013 at 13:08 UTC
`DB<182> $s=join '{e,a}',split /e/,"ferber" => "f{e,a}rb{e,a}r" DB<183> @a=< $s > => ("ferber", "ferbar", "farber", "farbar")` [download] UPDATE one-liner `DB<192> @a=glob(join '{e,a}',split /e/,"ferber") => ("ferber", "ferbar", "farber", "farbar")` [download] Cheers Rolf	[reply] [d/l] [select]
Re^2: Substitution of a particular letter in all combinations of positions in word (see inside) by AnomalousMonk (Archbishop) on Jan 09, 2013 at 14:39 UTC
... and using the `/r` substitution modifier of 5.14+: `>perl -wMstrict -le "printf qq{'$_' } for glob('ferber' =~ s{e}{{e,a}}xmsgr); " 'ferber' 'ferbar' 'farber' 'farbar'` [download]	[reply] [d/l] [select]
Re^2: Substitution of a particular letter in all combinations of positions in word (see inside) by Doctrin (Beadle) on Jan 09, 2013 at 13:17 UTC
Amazing! Thank you very much	[reply]
Re: Substitution of a particular letter in all combinations of positions in word (see inside) by Anonymous Monk on Jan 09, 2013 at 13:08 UTC
You first :)	[reply]