Hi Folks,
I’m new to Ruby and I’m trying to get a complete understanding of
blocks. I
captured some code in a block using lambda and was able to execute the
code
with the .time Integer iterator, but I get an exception trying to get it
to
work with the .upto iterator. The code is below. Can anyone explain why
the
.upto call fails but the .times call succeeds.
Excerpt:
proc1 = lambda do |p1|
puts “#{p1}”
end
This works.
5.times &proc1
Why does this fail?
0.upto(4) &proc2
Thanks,
Ed
Full Code:
Experiment with blocks!
Tried with ruby verion: ruby 1.8.6 (2007-09-24 patchlevel 111)
[i386-mswin32]
Ed Loyot
proc1 = lambda do |p1|
puts “#{p1}”
end
proc2 = Proc.new do |p1|
puts “#{p1}”
end
Make sure the proc works.
puts “Call proc1!”
proc1.call “112”
puts “Call proc2!”
proc2.call “212”
Try it with an iterator.
puts “Call proc1 with times iterator!”
5.times &proc1
puts “Call proc2 with times iterator!”
5.times &proc2
Why does this fail?
begin
puts “Call proc1 with upto iterator!”
0.upto(4) &proc1
rescue StandardError => error
puts "Caught error: " + error
end
Why does this fail?
begin
puts “Call proc2 with upto iterator!”
0.upto(4) &proc2
rescue StandardError => error
puts "Caught error: " + error
end