Re^5: bless with => separated args

My point was that $foo->new has confusing semantics. It should mean something like "create a new object based on $foo" not "create a new object of the same class as $foo". Who knows whether $foo->new creates a new, empty object of the same class or a complete copy of $foo. It's not clear unless you read the docs or the source code. I didn't say that I was confused, just that it was potentially confusing :)

Good OO programming practice is that class methods and object methods should be distinct. I think that it's a shame that common Perl practice seems to be to ignore that practice as it makes OO programming in Perl seem more complex than it needs to be.

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Comment on Re^5: bless with => separated args

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Re^6: bless with => separated args by Anonymous Monk on Aug 01, 2005 at 12:02 UTC
Who knows whether $foo->new creates a new, empty object of the same class or a complete copy of $foo. It's not clear unless you read the docs or the source code. Well, unless you read the docs or the source code, you don't know whether `Class->new` [download] returns an object of class Class, or something else. Or more generally, unless you read the docs or the source code, you don't know what `random_function` or `random_method` is going to return anyway. OTOH, I've yet to encounter code where `Class->new` [download] isn't a constructor of the class `Class`, or to encounter code where `$foo->new` [download] was called, and it returned something else than `(ref $foo)->new`. Good OO programming practice is that class methods and object methods should be distinct. I think that it's a shame that common Perl practice seems to be to ignore that practice as it makes OO programming in Perl seem more complex than it needs to be. Man, of all the problems of doing OO in Perl, the lack of separation between class and object methods looks incredibly minor to me.	[reply] [d/l] [select]

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Re^6: bless with => separated args
by Anonymous Monk on Aug 01, 2005 at 12:02 UTC

Who knows whether $foo->new creates a new, empty object of the same class or a complete copy of $foo. It's not clear unless you read the docs or the source code.

    Class->new
[download]

Or more generally, unless you read the docs or the source code, you don't know what random_function or random_method is going to return anyway.

OTOH, I've yet to encounter code where

    Class->new
[download]

Class

    $foo->new
[download]

(ref $foo)->new

Good OO programming practice is that class methods and object methods should be distinct. I think that it's a shame that common Perl practice seems to be to ignore that practice as it makes OO programming in Perl seem more complex than it needs to be.

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