Re: testing, counting, & arithmetic in general

[Loren James Rittle <rittle@comm.mot.com>]

>Date: 	Tue, 18 Jul 1995 16:11:46 -0400
>From: "Gregory L. Snead" <gsnead@harlequin.com>

>  Is this how I'm expected to do this type of operation in es?
>
>    i=1
>    while {test $i -le 10} {
>        echo $i
>        i=`{expr $i + 1}
>    }
>
>
>  I.e. use "/bin/test" for conditionals (where ~ and ~~ aren't
>appropriate) and "/bin/expr" for arithmetic operations?

You might try something ~2 orders of magnitude faster for large loop counts:

for (i = `{bc <<< 'for (i = 1; i <= 1000; i++) i'\n}) \
  {echo $i}

u=rittle@supra; time {    i=1
while {test $i -le 1000}{
        echo $i
        i=`{expr $i + 1}
    }
} >/dev/null
    92r    18.7u    58.4s       {...}

u=rittle@supra; time {for (i=`{bc <<<'for(i=1;i<=1000;i++)i'\n}){echo $i}} >/dev/null
     1r     0.6u     0.7s       {...}

-- 
Loren J. Rittle (rittle@comm.mot.com)          Ripem-1.2 MD5OfPublicKey:
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