Comments on: Playing with blocks : Part 1 http://www.rubyfleebie.com/playing-with-blocks-part-1/ Because programming should be fun Tue, 16 Mar 2010 23:14:29 +0000 http://wordpress.org/?v=2.1.2 By: rx http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-227 rx Mon, 28 May 2007 22:34:19 +0000 http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-227 your second example, given as > 1. my_block = Proc.new {|item| puts item} > 2. the_array.each(my_block) would fail, right. fix that by adding a `&' to the call parameter: 2. the_array.each( &my_block ) ^ using this syntax, you actually _can_ foist Proc objects on methods expecting only raw blocks. ...the pickaxe is your friend. ;-) your second example, given as

> 1. my_block = Proc.new {|item| puts item}
> 2. the_array.each(my_block)

would fail, right. fix that by adding a `&’ to the call parameter:

2. the_array.each( &my_block )
^

using this syntax, you actually _can_ foist Proc objects on methods expecting only raw blocks.

…the pickaxe is your friend. ;-)

]]> By: Morning Brew #15 http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-228 Morning Brew #15 Tue, 29 May 2007 11:01:55 +0000 http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-228 [...] Playing with blocks : Part 1 [...] […] Playing with blocks : Part 1 […]

]]> By: Shadowfiend http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-229 Shadowfiend Wed, 30 May 2007 17:32:18 +0000 http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-229 I believe in order to pass a block as an &-prefixed parameter, you have to prefix it with an &, as well. So: @greasy_food_you_eat_on_fridays.each(code_block) Would instead be: @greasy_food_you_eat_on_fridays.each(&code_block) Moreover, you should still be able to use yield in those situations. You should also be able to use block_given? in either situation instead of comparing to nil, which I find clearer. Nice post :-) I believe in order to pass a block as an &-prefixed parameter, you have to prefix it with an &, as well. So:

@greasy_food_you_eat_on_fridays.each(code_block)

Would instead be:

@greasy_food_you_eat_on_fridays.each(&code_block)

Moreover, you should still be able to use yield in those situations. You should also be able to use block_given? in either situation instead of comparing to nil, which I find clearer.

Nice post :-)

]]> By: Frank http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-230 Frank Wed, 30 May 2007 22:08:16 +0000 http://www.rubyfleebie.com/playing-with-blocks-part-1/#comment-230 rx and Shadowfiend, You're both right! I'm going to update the original post about that. rx, sorry. I don't know why your comment got marked as spam by Askimet. rx and Shadowfiend,

You’re both right! I’m going to update the original post about that.

rx, sorry. I don’t know why your comment got marked as spam by Askimet.

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