Re: Equating a variable and its value

*To*: mathgroup at christensen.cybernetics.net*To*: mathgroup at christensen.cybernetics.net*Subject*: [mg1228] Re: Equating a variable and its value*From*: jorma.virtamo at vtt.fi (Jorma Virtamo)*Date*: Fri, 26 May 1995 03:29:57 -0400

jans at matematik.su.se (Jan Snellman) wrote: > > > Hello folks. > > Study this codelet: > > m=3; mult=Times[#,m]&; Clear[m]; mult[10] > > To my dismay, I get 10 m, not 30. > How can i convince Mathematica that only pedants make the distinction > between a variable and its value? > > Regards, > Jan Snellman jans at matematik.su.se > In the constuction Times[#,m]& parameter m is not evaluated until the time of application of the function because of the non-standard evaluation rule of "Function" (see the Book, p. 279). One possibility to overcome the problem is to write mult = Function[x,x #]& [m] Now m gets evaluated at the time of definition by the standard evaluation procedure. -- Jorma Virtamo ============================================================ Jorma Virtamo VTT Information Technology / Telecommunications P.O. Box 1202, FIN-02044 VTT, Finland phone: +358 0 456 5612 fax: +358 0 455 0115 email: jorma.virtamo at vtt.fi web: http://www.vtt.fi/tte/ ============================================================