[EMAIL PROTECTED] wrote:
counting that out(regardless whether it is (dis)advantage or not), what
else a block can do but not a named function ?
My limited understanding is that the advantage is
- simpler syntax
- high level of integration into the standard library (*many* methods that take
thanks. Seems that my programs are very simple and don't need these
feature yet.
Kent Johnson wrote:
[EMAIL PROTECTED] wrote:
counting that out(regardless whether it is (dis)advantage or not), what
else a block can do but not a named function ?
My limited understanding is that the
Kent Johnson [EMAIL PROTECTED] wrote:
...
For example to open a file and read from it uses two closures, one to wrap
a block with the file open/close, one to iterate lines (from the pickaxe
book):
File.open(testfile) do |file|
file.each_line { |line| puts line }
end
Good example --
[EMAIL PROTECTED] wrote:
I'm reading about high order messages in Ruby by Nat Pryce, and
thinking if it could be util and if so, if it could be done in Python.
Nice sunday afternoon exercise. Yes, you can do this in python. This is
based on a relatively naive translation of the ruby version:
On a (somewhat) related note,
I've always wondered whether it is possible to emulate ruby blocks
using a python generator '+ alpha'. In my limited understanding of the
ruby block, the generator can inject values into a block, I suppose,
but what is the block itself? can it be a function? a class
http://www.artima.com/intv/closures.html
http://www.rubyist.net/~matz/slides/oscon2005/index.html
It's a read-write closure, a co-routine, sort of a continuation (tho
Kernel.callcc is considered the real continuation mechanism).
And you can make it a Proc object (basically an unbound object you
could someone enlighten me what is the advantage of block over named
function ?
One thing that I can see a difference may be lexical scope ?
vdrab wrote:
On a (somewhat) related note,
I've always wondered whether it is possible to emulate ruby blocks
using a python generator '+ alpha'. In my
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
could someone enlighten me what is the advantage of block over named
function ?
One thing that I can see a difference may be lexical scope ?
Yes, but -- according to the latest Ruby book, the mixed lexical
scope of blocks is a highly controversial
counting that out(regardless whether it is (dis)advantage or not), what
else a block can do but not a named function ?
Alex Martelli wrote:
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
could someone enlighten me what is the advantage of block over named
function ?
One thing that I can see
I'm reading about high order messages in Ruby by Nat Pryce, and
thinking if it could be util and if so, if it could be done in Python.
Someone already tried?
References:
http://lambda-the-ultimate.org/node/view/1047
http://nat.truemesh.com/archives/000535.html
On 22 Oct 2005 14:12:16 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
I'm reading about high order messages in Ruby by Nat Pryce, and
thinking if it could be util and if so, if it could be done in Python.
Someone already tried?
Here's an example of the idea, in Python:
def messageA():
Hum... I thnk you dont get the ideia: I'm not talking abou High Order
Functions.
What ho call High Order Methods is some like connecting some
'generic' methods created to do things like this:
claimants.where.retired?.do.receive_benefit 50
The 2nd and 3rd links that in the first post is the
On 22 Oct 2005 15:11:39 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hum... I thnk you dont get the ideia: I'm not talking abou High Order
Functions.
What ho call High Order Methods is some like connecting some
'generic' methods created to do things like this:
This can be suitably applied to Python with the use of Higher Order
Functions, though. It's not quite the Ruby version because Python
allows you to use functions as first-class objects, complicating the
All-You-Can-Do-Is-Pass-A-Message philosophy. This is my 5-minute
implementation:
class
[EMAIL PROTECTED] [EMAIL PROTECTED] writes:
I'm reading about high order messages in Ruby by Nat Pryce, and
thinking if it could be util and if so, if it could be done in Python.
Someone already tried?
Yes, I'm pretty sure it could be done in Python. All it really needs
is the ability to
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