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601: Mainline 
 
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For example, suppose you have produced a 
Weight class, and all of that class's allied methods, as defined in 
Segment 556.  Together, the Weight class and the 
allied methods constitute a small application.


If you decide to share the application for use by another programmer, you 
must execute the  file-out 
ritual prescribed by the development environment.  For the  Smalltalk Express 
development environment, for example, you proceed as follows:


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\o First, activate the class-hierarchy browser, as explained in 
   \chunkref\defineBrowser/. 
\o Click \click|Magnitude|, and then click \click|Weight|.  You see the 
   following: 
\endbullets 
\par C:\Phw\Onto\Smalltalk\exchange.tex •••




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\o Next, click \click|right| in the class column.  A menu will emerge. 
\o Click \click|File out...|.  A text-input box will emerge. 
\o Provide a file name, such as \code{\backslashSign/test\backslashSign/weight.cls}, and click \click|Ok|. 
\endbullets 
\par C:\Phw\Onto\Smalltalk\exchange.tex •••


After you have followed this ritual, Smalltalk will have written the 
definition of the Weight class and all the methods associated with 
the weight class into the file that you specified.


 C:\Phw\Onto\Smalltalk\exchange.tex •••