RE: HoldForm Obscurities

*To*: mathgroup at smc.vnet.net*Subject*: [mg33997] RE: [mg33945] HoldForm Obscurities*From*: "Wolf, Hartmut" <Hartmut.Wolf at t-systems.com>*Date*: Fri, 26 Apr 2002 03:27:16 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

As has been shown by Jens-Peer, my conclusion was erroneous, complete nonsense! In[14]:= MakeExpression["1 1 2 2"] // FullForm Out[14]//FullForm= HoldComplete[Times[1, 1, 2, 2]] Sorry, Hartmut > -----Original Message----- > From: Wolf, Hartmut To: mathgroup at smc.vnet.net > Sent: Wednesday, April 24, 2002 11:11 AM > To: 'Dustin Vink'; mathgroup at smc.vnet.net > Subject: [mg33997] RE: [mg33945] HoldForm Obscurities > > > > > -----Original Message----- > > From: Dustin Vink [mailto:d.vink at mech.gla.ac.uk] To: mathgroup at smc.vnet.net > > Sent: Wednesday, April 24, 2002 7:22 AM > > To: mathgroup at smc.vnet.net > > Subject: [mg33997] [mg33945] HoldForm Obscurities > > > > > > Dear Reader, > > > > Can someone explain the following obscurity? > > > > In: HoldForm[Times[1, 1, 2, 2]] > > > > Out: 2 2 > > > > In: HoldForm[Times[1, 1, 2, 1]] > > > > Out: 1 1 2 1 > > > > In: HoldForm[Times[1, 1, 2]] > > > > Out: 1 1 2 > > > > In: HoldForm[Times[2, 1, 2]] > > > > Out: 2 2 > > > > > > Dustin ~:( > > > > > > Dustin, > > this observation of you has nothing to do with HoldForm (or > Hold, showing the same phenomenon). This already happens when > Mathematica input is parsed to form an expression. See > > In[14]:= MakeExpression["1 1 2 2"] > Out[14]= HoldComplete[2 2] > > Some transformations are already made when reading input (to > ease the interpreter). Another example would be > > In[15]:= MakeExpression["2^^1011"] > Out[15]= HoldComplete[11] > > So here some 1-s are (occasionally) skipped at Times. No harm > is done with this. I don't know what you like to achieve, > perhaps better manipulate strings. > > -- > Hartmut > >