Re: nice Gotcha!
- To: mathgroup at smc.vnet.net
- Subject: [mg15069] Re: nice Gotcha!
- From: "Allan Hayes" <hay at haystack.demon.co.uk>
- Date: Thu, 10 Dec 1998 03:13:02 -0500
- References: <74aiui$45l@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Luc, Two suggetions 1) use Block instead of Module Clear[x]; test[] := Block[{x}, ToExpression["x=3"]; Print[x];] test[] 3 Print[x]; x 2) Since you seem to want a print response, stay with strings: using StringReplace["x=3", "x=" -> ""] 3 or if you need to evaluate a = 3; Print[ToExpression[StringReplace["x=a", "x=" -> ""]]] 3 Barthelet, Luc wrote in message <74aiui$45l at smc.vnet.net>... > >Code similar to the following gave me trouble today. I thought it would >be fun to share: > >Clear[x]; >test[] := Module[ > {x}, > > ToExpression["x=3"]; > Print[x]; > ]; >test[]; >Print[x]; > >In my version. "x" was infact the variable "Active" which is an option >to ButtonBox and created a ton of problems. Of course I could not >change the name (user driven, and that's why I am running a >ToExpression on it). > >The solution was to not declare Active in the Module and to >Clear[Active] in the function. > >any other insight? > > >Luc Barthelet >GM the day, Mayor at night >http://www.simcity.com > >