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Comment by mk | Hacker News Reader

Exactly. Even though lately there has been a lot of new users and a lot of meta discussion, there are still interesting posts like this one. Personally I have moved away from PHP and to Django, but I am looking forward to PHP 5.3.

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Thanks for calling my post interesting. If it weren't for me having to deal with PHP at work, I wouldn't have even considered looking at PHP 5.3, but since I do, this represents a way for me to use PHP which is at least a little more consistent with the way I reason about programming in other languages such as Scheme (and in some ways Python, though map, and filter aren't 'Pythonic' anymore).

> "though map, and filter aren't 'Pythonic' anymore"

How come? I must have missed the memo...

list comprehensions take care of them. Guido wanted to remove them from Python 3.

   map = lambda f, a: [f(x) for x in a]
   filter = lambda f, a: [x for x in a if f(x)]

Makes sense; thank you for the explanation.

List comprehensions cover 90% of the use cases, but I'm glad map and filter were not removed. List comprehensions do not have first class status. You can pass map and filter around as arguments to other functions, but you cannot pass around "for", "in", and "if".

You're right, but even if they were removed, see above for their definition. :)

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