RE: Extracting the name of a variable

*To*: mathgroup at smc.vnet.net*Subject*: [mg26929] RE: [mg26883] Extracting the name of a variable*From*: "David Park" <djmp at earthlink.net>*Date*: Fri, 26 Jan 2001 23:30:06 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Mike, Attributes[nameValue] = HoldFirst; nameValue[x_] := Module[{c = SymbolName[Unevaluated[x]]}, c <> " = " <> ToString[x]] z = 4; nameValue[z] "z = 4" On the other hand, ?z Global`z z = 4 Also OwnValues[z] {HoldPattern[z] :> 4} David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ > From: Mike Yukish [mailto:may106 at psu.edu] To: mathgroup at smc.vnet.net > Hello, > > I'd like to make a function that extracts the name of a variable and > makes a string. So the function would do: > > In: z = 4 > > In: nameExtract[z] > > Out: "z" > > It appears to not be so simple, since once you assign z a value, the > function SymbolName[z] returns an error. what's the trick? > > I want to do this so I can make a function takes z as an argument, and > generates a name:value pair "z=4" >