On Thu, Aug 16, 2012 at 3:51 PM, ajay paswan <[email protected]> wrote:
> suppose
> var="world"
> I want to call a method called hello_world() using the variable var. How
> to do that in ruby?
> and what feature of programing is this called?suppose
> var="world"
> I want to call a method called hello_world() using the variable var. How
> to do that in ruby?
> and what feature of programing is this called?
>
> to be clear:
> I want something like calling the method like :
> hello_+$var+()
You can do
send "hello_#{var}"
to dispatch to a method with a calculated name. An alternative
approach is to do this:
my_methods = {
'world' => lambda { puts "hello world" },
'moon' => lambda { puts "hello moon" },
'sun' => lambda { puts "hello sun" },
}
and then
my_methods[var].call
But in that case you'd rather use a method argument, of course:
def hello(x)
puts "hello #{x}"
end
hello("world")
hello is a method (or rather function but Ruby does not have functions
which are not associated with a particular object). x is the
argument. "#{...}" is string interpolation.
Kind regards
robert
--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/
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