From: Bart Schaefer <schaefer@brasslantern.com>
To: Emanuel Berg <embe8573@student.uu.se>, zsh-workers@zsh.org
Subject: Re: why do ceil/floor give the decimal dot?
Date: Wed, 13 May 2015 21:04:05 -0700 [thread overview]
Message-ID: <150513210405.ZM29616@torch.brasslantern.com> (raw)
In-Reply-To: <87d223et0a.fsf@debian.uxu>
On May 14, 5:29am, Emanuel Berg wrote:
}
} prefix-len () {
} local hosts=$1
} echo $(( 32 - int(ceil(log($hosts)/log(2))) ))
} }
}
} without the integer conversion, the output for
}
} prefix-len 30
}
} isn't 27, but "27."
Yes, because as in most languages all integers in a mixed-type expression
are converted to floating point before the operation is carried out, so
$(( 32 - anyfloat )) becomes $(( 32. - anyfloat )) and results in a float.
If what you want to argue is that floating point values that happen to be
whole numbers should not print the trailing dot, that's another discussion.
next prev parent reply other threads:[~2015-05-14 4:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 0:32 Emanuel Berg
2015-05-14 2:56 ` Bart Schaefer
2015-05-14 3:29 ` Emanuel Berg
2015-05-14 3:53 ` Lawrence Velázquez
2015-05-14 9:53 ` Peter Stephenson
2015-05-14 21:38 ` Emanuel Berg
2015-05-14 22:14 ` Lawrence Velázquez
2015-05-14 23:29 ` Emanuel Berg
2015-05-15 0:46 ` Oliver Kiddle
2015-05-15 1:07 ` Emanuel Berg
2015-05-15 1:27 ` Bart Schaefer
2015-05-18 8:16 ` Vincent Lefevre
2015-05-14 4:04 ` Bart Schaefer [this message]
2015-05-14 9:12 ` Emanuel Berg
2015-05-14 17:54 ` Bart Schaefer
2015-05-18 8:39 ` Vincent Lefevre
2015-05-18 9:41 ` Mikael Magnusson
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