hemant
11/8/2006 8:19:00 AM
On 11/8/06, gaurav bagga <gaurav.v.bagga@gmail.com> wrote:
The problem is hidden in following lines. There is no problem with
doing send on methods.
> class MyNewClass
> attr_accessor :name,:place,:age
> end
> a=[]
> 1.upto(3) do
> val=MyNewClass.new
> val.instance_variables.each do |met|
> val.send(met.delete("@")+"=",gets.chomp!)
> end
> a<<val
> end
You are trying to define some attributes, through attr_accessor. Now,
what attr_accessor does? It sets couple of instance methods
automatically on your class. So...if you do:
val.instance_variables.each do|x|
p x
end
You will get an empty list. Why? Because your instance variables are
not there yet. What probably you want to do is..get instance_methods
and set your instance_variables there. Until you set them
up..."val.instance_variables" will contain a empty list. and hence all
the subsequent lines will fail.
> a.each do |val|
> val.instance_variables.each do |met|
> p val.send(met.delete("@"))
> end
> end
> a.each do |val|
> MyNewClass.instance_methods(false).select{
> |v| v =~ /[=$]/
> }.each do |met|
> val.send(met,gets.chomp!)
> end
> end
>
> a.each do |val|
> MyNewClass.instance_methods(false).select{
> |v| v =~ /[a-z]$/
> }.each do |met|
> p val.send(met)
> end
> end
>
>
> hi all,
> can any one tell me whats wrong with this code its not working for
> val.send(met.delete("@")+"=",gets.chomp!)
>
> if instead of val.send(met.delete("@")+"=",gets.chomp!) i give
> val.name=gets.chomp!..... it works
>
> regards
> gaurav v bagga
>
>
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