From: Bart Schaefer <schaefer@brasslantern.com>
To: zsh-users@zsh.org
Subject: Re: logical NOT
Date: Thu, 10 May 2012 08:12:12 -0700 [thread overview]
Message-ID: <120510081212.ZM14892@torch.brasslantern.com> (raw)
In-Reply-To: <20120510135934.00f00537@internecto.net>
On May 10, 1:59pm, Mark van Dijk wrote:
}
} Then I wondered about how to let zsh "reverse" a binary number and came
} up with the logical NOT: simply flip each bit.
As others have noted, that gives you the number what might be described
as "upside down", rather than backward.
mac2bin() {
setopt localoptions extendedglob
print ${(l:8::0:)${${(s.:.)1}//(#b)(*)/$(([#2]$match))}#2\#}
}
reverse() {
setopt localoptions noksharrays
local i a
a=( ${(s::)*} )
for i in {$#a..1}; print -n -- $a[$i]
print
}
torch% mac2bin AC:DE:48:00:00:80
00000000 00000000 00110000 00000000 00000000 01010000
torch% reverse $(mac2bin AC:DE:48:00:00:80)
00001010 00000000 00000000 00001100 00000000 00000000
next prev parent reply other threads:[~2012-05-10 15:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-10 11:59 Mark van Dijk
2012-05-10 12:30 ` René Neumann
2012-05-10 12:47 ` Jérémie Roquet
2012-05-10 15:12 ` Bart Schaefer [this message]
2012-05-10 18:02 ` Mikael Magnusson
2012-05-12 11:41 ` Internecto List Subscriber
2012-05-12 11:43 ` Mark
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