Load part of a package?
- To: mathgroup at smc.vnet.net
- Subject: [mg126497] Load part of a package?
- From: nanobio9 <kuokan.liang at gmail.com>
- Date: Tue, 15 May 2012 04:52:55 -0400 (EDT)
- Delivered-to: email@example.com
Hi, all, The question is: when one loads a package with quite a lot of information, for example, PhysicalConstants, often one eventually finds that only 2 or 3 of them are used, however, a lot of definitions are loaded in global space. (In this specific example, moreover, Units package is also loaded, I think.) Similar things happens to my home- made packages. If I store a lot of pre-calculated results and definitions and so on in one place (at times I cannot find a reasonable way to divide them into separate files), I have to load everything together. One of the ways to reduce the system load is to write a routine to load the package, return the item I want, and Clear all other things. This, however, takes a lot of time of writing stupid programs. For example, to load a constant value from the PhysicalConstants package, I have to use a Module in which all of the constants in the package are declared local explicitly so that they will be "destroyed" after dismissing the module. Moreover, it will not save the time of loading the package. I am not good enough to be able to figure out what I should clean up with the Units package which is invoked by the PhysicalConstants package. In short, it can be done, but in painful ways. So have any of you ever thought of how to handle such situation? More specifically, is there a "program pattern" with which one only picks up specific part of a package? Thank you very much!