Xah Lee wrote: > In imperative languages such as Perl and Python and Java, in general it > is not safe to delete elements when looping thru a list-like entity. > (it screws up the iteration) One must make a copy first, and work with > the copy.
Correction: When looping thru a list-like entity and delete elements in the vary list, there's a question whether it will change the iteration. (For example, if one loops thru 1 to 9, and deleted 8 while at 2, should the loop still do 8?) For some languages and or list entities, the answer may be yes or no. However, in imperative languages such as Perl and Python and Java, often this is not allowed by the language, partially as a protection to safeguard and assume programers as ignoramuses, but partially because the internal issues of these languages can't handle it. The work around in these languages is always to make a copy of the list-entity, and work with the copy. Xah [EMAIL PROTECTED] http://xahlee.org/PageTwo_dir/more.html -- http://mail.python.org/mailman/listinfo/python-list
