There is no need for a "linked list" in Perl! A Perl list does what a C linked list can do and more!

Fond as I am of shiftily pushing and popping in Perl, I simply have to disagree with this.

For example, one nice property of a linked list that isn't shared by what you call Perl lists is that pointers into it are not invalidated by insert/delete operations elsewhere.

(This is actually a real-world example that has bitten me just this week: I have a list of properties, and a bunch of objects that each need to access all properties up to and including a certain point. The implementation stores the properties in an array and simply has the objects hold the index of the last property they need. Now suddenly I have a new requirement to insert properties at arbitrary positions in the list, and that means I potentially have to change the indices stored by every object. If I'd been using a linked list, I'd have got the correct behaviour by default. I'm sorely tempted to redo it that way ...)

In reply to Re^2: Perl vs C by Porculus
in thread Perl vs C by santhosh_89

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