STRING PROBLEM

[kaB00M]

How can I do this:

(1)I have a variable: @a = "method_one"

(2)Then, I want to use that variable to call a method:

class A
def method_one
#code
end
end

But since the variable contents is between quotes, it doesn't work.
--------------------------------------------------------------------------
ALSO: how can you make a second text line in a window. Like if a want to make a text that reads:


T
H
I
S

Is

T
E
X
T
--------------------------------------------------------------------------
Thanks in advance

 

[Mr.Mo]

to call a method using a string you do:

eval(STRING)

in this case:

eval(@a)

Eval is used to make string into code. You can do alot more stuff.

eval("p 1+1")

or more complex:
eval("method_one(para1,par2)")

 

[Trickster]

Or rather than using eval

if you want to call a method using a string or symbol call this code

method(string/symbol).call(argument list)

so for your example your code would be (method_one has no arguments)

method(@a).call

here is another example

def hi(a, b)
p "The Sum is " + (a+b).to_s
end

to call this using the above would be

methodhi).call(4, 8) or method('hi').call(4, 8)

and this will be displayed "The Sum is 12"

what the code does is get the associated method object and then calls it

 

[Mr.Mo]

hmm, that I actually never saw.

 

[Sheol]

I think send will work better, because method is used to create an object:

method = 'string'.method('reverse')
print method.call  # gnirts

To use send:

method = 'reverse'
print 'string'.send(method)  # gnirts

 

[kaB00M]

Thanks a lot all of you. This topic has been resolved...

 

[Raziel]

This topic has been resolved. If kaB00M or any other users have any questions or further problems regarding this topic, please create a new thread about them.

Thank you!