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MathGroup Archive 2002

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Postponing loading of Package

  • To: mathgroup at smc.vnet.net
  • Subject: [mg36620] Postponing loading of Package
  • From: "ng" <georgakopoulos at mindspring.com>
  • Date: Fri, 13 Sep 2002 23:33:26 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

I wrote a package (call it "ThisPackage`") that uses
DeclarePackage["OtherPackage`", {"BigVariable"} ]. The idea was to prevent
the loading of a large file in routine cases. However, when ThisPackage`
defines its functions, inside the Private` area, it includes a conditional
call to BigVariable. It turns out that OtherPackage is loaded when that
function is defined. I was wondering if there is a way to avoid this.
Roughly speaking, here is the setting:

BeginPackage[ "OtherPackage`" ]
BigVariable::usage="example
Begin[Private`]
BigVariable=Table[x y,{x,1000},{y,1000}]
End[ ]
EndPackage[ ]

BeginPackage[ "ThisPackage`" ]
function::usage="example
Begin[Private`]
function[x_]:=Module[{y},
y=If[x>1000,BigVariable[[x]],x] ]
End[ ]
EndPackage[ ]


I don't want OtherPakage to be loaded unless function[x] is called with
x>1000 but it loads when function is defined. Any ideas?


Thanks!

Nicholas






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