Re: returning variable number of arguments from a Module[ ]

*To*: mathgroup at smc.vnet.net*Subject*: [mg71501] Re: returning variable number of arguments from a Module[ ]*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Mon, 20 Nov 2006 18:12:04 -0500 (EST)*Organization*: Customer of PlusNet plc (http://www.plus.net)*References*: <ejs38c$94b$1@smc.vnet.net>

bd satish wrote: > Hi , > > Is there any method to return a variable number of arguments from a > Module[ ] or Block[ ] depending upon the o/p list ? > > For example, consider a module > > f[x_,y_]:= Module[ {t,s} , t=x+y; s = t*y ] > > Also assume that , the variable 's' has higher priority than 't' . So when > a user types a single o/p variable i.e. > > W = f[x,y] then W should have the same value as 's' in the > module > > { W, Y } = f[x,y] then W points to 's' and 'X' points to 't' > > If I try to do the above ,I'm getting some warning messages.. > > Please help. > > Hello, I found it tough to understand this question - so it is possible that I have misunderstood you, but the simple answer is that f[x,y] will be evaluated before the assignment of which it is the RHS. Also, in your module, there is no point in including the variable s - you might as well put the expression t*y as the final value. If f always returns a list of three objects (say) you could always trim that subsequently as required as part of the assignment: {W,Y}=Take[f[x,y],2]; To be honest, I suspect that there is a better way of solving whatever it is that you are trying to do - why not tell us more? David Bailey http://www.dbaileyconsultancy.co.uk