Calling object method from variable

[Frodo Larik]

Hi all,

I have two questions regarding object methods

1. Is it possible to call a method from a variable?
Something like this:

i_am_just_a_var = 'this_is_the_real_method'
o = Object.new
o.#{i_am_just_a_var} = 'some thing I want'



2. What is the best way to check for a method of an object?

After playing around in irb I came up with this:

o = Object.new
if ( o.methods.grep(/^some_method_name$/ )
# do stuff
else
# do something else
end


Sincerely,

Frodo Larik

 

[Robert Klemme]

Hi all,
=20
I have two questions regarding object methods
=20
1. Is it possible to call a method from a variable?
Something like this:
=20
i_am_just_a_var =3D 'this_is_the_real_method'
o =3D Object.new
o.#{i_am_just_a_var} =3D 'some thing I want'

o.send("#{i_am_just_a_var}=3D", 'some thing I want')

2. What is the best way to check for a method of an object?
=20
After playing around in irb I came up with this:
=20
o =3D Object.new
if ( o.methods.grep(/^some_method_name$/ )
# do stuff
else
# do something else
end

o.respond_to? :foo
o.sendrespond_to?, i_am_just_a_var)

Cheers

robert

 

[Lionel Thiry]

Frodo Larik a écrit :

Hi all,

I have two questions regarding object methods

1. Is it possible to call a method from a variable?
Something like this:

i_am_just_a_var = 'this_is_the_real_method'
o = Object.new
o.#{i_am_just_a_var} = 'some thing I want'

var_method = YourClass.instance_methodreal_method)
o = YourClass.new
var_method.bind(o).call

or

o = YourClass.new
var_method = o.methodreal_method)
var_method.call

also

o = YourClass.new
var_method = o.methodreal_method=)
var_method.call 'some thing I want'

Please note: do not write var_method.call='some thing I want', you'll
get an error.