Re: atoi equivalents?
- To: mathgroup at smc.vnet.net
- Subject: [mg99410] Re: atoi equivalents?
- From: dbreiss at gmail.com
- Date: Tue, 5 May 2009 05:41:25 -0400 (EDT)
- References: <email@example.com>
>From the docs: "ToExpression[input,form,Hold] can be used to convert input to an expression, but with the expression wrapped in Hold to prevent evaluation. " In this way the code in the hoped for number will not be arbitrarilly executed. Hope this helps, David On May 4, 4:44 pm, Michael <michael2... at gmail.com> wrote: > What is the most efficient or recommended way to parse numbers in Mathematica? > > I can use ToExpression["1234"] and it will return the number. > But this won't do, because I could be scraping un-trusted data and the > above could lead to an injection of code. > I could also use something like this: ToExpression[StringCases["1234", > x1 : NumberString ~~ ___ -> x1]] > but then I have to add error checking and whatnot. > I suppose I could write a simple MathLink program which implement > atoi, atol, etc. > > All of these solutions seems like a lot of overhead. Anybody have a > better idea? > > Thanks, > > Michael