From: Dave Aronson <rubytalk2dave@...>
Date: 2013-07-27T23:25:29+09:00
Subject: Re: Calculate input - numbers

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On Saturday, July 27, 2013, Marc Heiler wrote:

>
> Right now I use eval() and it works, but I am wondering if there is a
> better alternative for it?


Depends what you mean by "better".  As others have shown, there are
certainly more /secure/ ways, and ways that are much more able to handle
things other than Ruby (i.e., you can make a parser to parse pretty much
anything).

On things that you know to be simple non-dangerous Ruby code, sure, eval
wins /if/ your criterion is ease of use (and you're already in IRB).  For
most other purposes, yes, there's some thing better, but which way is best,
depends on what you want out of it.

-Dave


-- 
Sent from Gmail Mobile; please excuse top posting, typos, etc. :-(

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On Saturday, July 27, 2013, Marc Heiler  wrote:<br><blockquote class=3D"gma=
il_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-lef=
t:1ex"><br>
Right now I use eval() and it works, but I am wondering if there is a<br>
better alternative for it?</blockquote><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"></blo=
ckquote><div><br></div>Depends what you mean by &quot;better&quot;. =C2=A0A=
s others have shown, there are certainly more /secure/ ways, and ways that =
are much more able to handle things other than Ruby (i.e., you can make a p=
arser to parse pretty much anything).<div>
<br></div><div>On things that you know to be simple non-dangerous Ruby code=
, sure, eval wins /if/ your criterion is ease of use (and you&#39;re alread=
y in IRB). =C2=A0For most other purposes, yes, there&#39;s some=C2=A0thing =
better, but which way is best, depends on what you want out of it.</div>
<div><br></div><div>-Dave<span></span></div><br><br>-- <br>Sent from Gmail =
Mobile; please excuse top posting, typos, etc.  :-(<br>

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