'with' proposal

ruby-talk
1

Hello!

Wouldn’t something like this be cool?

class Foo
def read
…
end
def dump
…
end
def is_empty?
…
end
end

f = Foo.new

with f do
read
dump
draw unless is_empty?
end

Regards,

···

–
University of Athens I bet the human brain
Physics Department is a kludge --Marvin Minsky

2

Hi –

Hello!

Wouldn’t something like this be cool?

class Foo
def read
…
end
def dump
…
end
def is_empty?
…
end
end

f = Foo.new

with f do
read
dump
draw unless is_empty?
end

irb(main):007:0> class Foo; def talk; puts “hi”; end; end
=> nil
irb(main):008:0> f = Foo.new
=> #Foo:0x400b32a8
irb(main):009:0> f.instance_eval do talk end
hi

:slight_smile:

David

···

On Sun, 23 Nov 2003, Elias Athanasopoulos wrote:

–
David A. Black
dblack@wobblini.net

3

this is a faq:

def with(obj, &blk)
obj.instance_eval &blk
end

with 10 do
puts to_s
puts methods
end

···

il Sun, 23 Nov 2003 03:26:38 +0900, Elias Athanasopoulos elathan@phys.uoa.gr ha scritto::

Hello!

Wouldn’t something like this be cool?

with f do
read
dump
draw unless is_empty?
end

4

Uber nice! Thanx. :slight_smile:

Regards,

···

On Sun, Nov 23, 2003 at 03:30:18AM +0900, David A. Black wrote:

irb(main):007:0> class Foo; def talk; puts “hi”; end; end
=> nil
irb(main):008:0> f = Foo.new
=> #Foo:0x400b32a8
irb(main):009:0> f.instance_eval do talk end
hi

:slight_smile:

–
University of Athens I bet the human brain
Physics Department is a kludge --Marvin Minsky

5

Further:

class Foo
def talk
puts "Hi."
end
end

def with(obj, &blk)
obj.instance_eval &blk
end

f = Foo.new

with f do
talk
end

  • Dan