the following code sequence
cgi.div{
1…3.times{ |i|
cgi.div{
“hello from div”
}
}
}
produces
but i wanted to produce
could someone point me how to get the right result ?
the following code sequence
cgi.div{
1…3.times{ |i|
cgi.div{
“hello from div”
}
}
}
produces
but i wanted to produce
could someone point me how to get the right result ?
Hi –
On Tue, 3 Jan 2006, lg wrote:
produces
huhuhuhucould someone point me how to get the right result ?
1…3.times is being parsed as: 1…(3.times). Since times returns its
receiver, that’s the same as: 1…3
Try this:
cgi.div {
(1…3).map {
cgi.div {
“hello from div” # or “huhu”, or whatever
}
}
}
You could also do:
cgi.div { cgi.div { “hello from div” } * 3 }
David
–
David A. Black
[email protected]
“Ruby for Rails”, from Manning Publications, coming April 2006!
produces
1..3
This is, because the 1…3… statement returns “1…3” and this is
what cgi gets. Try it with irb.
perhaps this works (untested)
cgi.div{
temp_string=""
1…3.times{ |i|
temp_string << cgi.div{ “hello from div” }
}
temp_string
}
i.e. it collects the divs in a temporary string and gives that to the
outer div.
Patrick
Hey chaps,
I’d just like to check that the following uses methods and that no
classes or instance variables are created. I see that there are no
@instance_variables…
Where’s the object? What class is being used?
Am I correct in saying that say_goodnight is a method, where (name) is
the parameter for it?
#!/usr/bin/ruby
def say_goodnight(name)
“Good night, #{name.capitalize}”
# we use the output of the last result - this save time
end
puts say_goodnight(‘jayeola’)
puts say_goodnight(‘john-Boy’)
puts say_goodnight(‘mary-Ellen’)
puts say_goodnight(‘mary-loo’)
puts say_goodnight(‘silly-slapper’)
puts say_goodnight(‘hex-editor’)
thanks - this was the hint i needed !
regards,
lars
I’d just like to check that the following uses methods and that no classes
or instance variables are created. I see that there are no
@instance_variables…Where’s the object?
try
ruby -e ‘p self’
(as if executing a ruby file containing “p self” and nothing else)
it prints “main”.
Apparently the object sees itself as main. ok.
What class is being used?
do
ruby -e ‘p self.class’
it prints “Object”
so main is an Object. tadaa!
(actually, it is a bit more than “just” an Object, but you can figure
that
out yourself when you learn about Modules and mixin)
What should you learn from this? Everything is an object. Really. But if
you
want to do some simple procedural stuff, the objects do not get in your
way.
They can be, as you experienced, completely invisible. That’s one of
many,
many reasons I like Ruby so much
Am I correct in saying that say_goodnight is a method, where (name) is the
parameter for it?
absolutely correct
#!/usr/bin/ruby
Tue Dec 27 15:42:59 GMT 2005
from page 13 of the pick-axe book
def say_goodnight(name)
“Good night, #{name.capitalize}”
# we use the output of the last result - this save time
end
[snip]
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