What's the difference between deep and shallow binding?
In deep binding, lexical variables mentioned in anonymous subroutines are the
same ones that were in scope when the subroutine was created. In shallow
binding, they are whichever variables with the same names happen to be in scope
when the subroutine is called. Perl always uses deep binding of lexical
variables (i.e., those created with my()). However, dynamic
variables (aka global, local, or package variables) are effectively shallowly
bound. Consider this just one more reason not to use them.
This is wrong. Deep binding vs shallow binding is an implementation choice for variable binding, not a semantic difference. Both dynamic scoping and lexical scoping can use deep or shallow binding. (If this comment was disrespectful, please report it.)
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By 2 Users
8/28/2004 4:22:21 PM: 
