On 04 May 2012 09:28:45 +0300, Gaal Yahas wrote:
>
> On Thu, May 3, 2012 at 9:02 PM, Mikhael Goikhman <[email protected]> wrote:
> >
> > Here is a useful line-based calculator:
> >
> > perl -ple '$_=eval'
>
> I prefer
>
> perl -de1
>
> You have to explicitly prefix the expressions whose results you
> want to print with "p" or "x", but in return you get way more
> power. And it's shorter :-)
Ok, but the invocation shortness is less relevant IMO, since you may
alias it. What is more important is the short/convenient usage.
I have this shell alias for years (you are welcome to golf it):
alias calc='perl -nle "BEGIN
{ if (@ARGV) { print eval qq{@ARGV}; exit } } print eval"'
Then you may conveniently use it interactively, with params and piped:
calc
calc 5+37
calc 1 / 3
echo '2**15' | calc
Regards,
Mikhael.
--
perl -le'print$,.=chr(64+hex),-8x(16+$;--)for+split//,d9b815c07f9b8d1e0'
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