Method by string?

ruby-talk
1

I'm creating a program which uses a ruby source file as config
file.

I don't know which methods are defined in this config file.

The problem I have is that I would like to run a method with the same
name as a string.

Example:
This is the config file

class Main
    def test1
        puts 'test1'
    end

    def test2
        puts 'test2'
    end
end
   
This is the main source:

$method = "test1"
$mode = Main.new

# this ofcours doesn't work:
$mode.$method

How should I do this?

···

--
Roeland

2

$mode.$method

   $mode.send($method) # ruby will be able to call also private and
                        # protected methods

Guy Decoux

3

I'm creating a program which uses a ruby source file as config
file.

I don't know which methods are defined in this config file.

The problem I have is that I would like to run a method with the same
name as a string.

Example:
This is the config file

class Main
    def test1
        puts 'test1'
    end

    def test2
        puts 'test2'
    end
end
   
This is the main source:

$method = "test1"
$mode = Main.new

# this ofcours doesn't work:
$mode.$method

How should I do this?

Stupid me:

$mode.method($method)

···

On Thu, Sep 09, 2004 at 12:02:24AM +0900, Roeland Moors wrote:

--
Roeland

4

--- Roeland Moors <roelandmoors@telenet.be> wrote:

> This is the main source:
>
> $method = "test1"
> $mode = Main.new
>
> # this ofcours doesn't work:
> $mode.$method
>
> How should I do this?
>

Stupid me:

$mode.method($method)

This won't do what you want. It'll return a Method
object rather can calling the method.

As has been mentioned in other emails you need to
write

$mode.send($method)

BTW is the code supposed to be using global rather
than local variables?

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···

On Thu, Sep 09, 2004 at 12:02:24AM +0900, Roeland > Moors wrote:

5

thanks I'm now using something like this:
$mode.send($method) if $mode.methods.include?($method)

···

On Thu, Sep 09, 2004 at 12:07:35AM +0900, ts wrote:

> $mode.$method

   $mode.send($method) # ruby will be able to call also private and
                        # protected methods

--
Roeland

6

"Roeland Moors" <roelandmoors@telenet.be> schrieb im Newsbeitrag
news:20040908150955.GA6939@laptop...

> I'm creating a program which uses a ruby source file as config
> file.
>
> I don't know which methods are defined in this config file.
>
> The problem I have is that I would like to run a method with the same
> name as a string.
>
> Example:
> This is the config file
>
> class Main
> def test1
> puts 'test1'
> end
>
> def test2
> puts 'test2'
> end
> end
>
>
> This is the main source:
>
> $method = "test1"
> $mode = Main.new
>
> # this ofcours doesn't work:
> $mode.$method
>
> How should I do this?
>

Stupid me:

$mode.method($method)

No, that just returns the method object. You then still need to invoke
it.

"foo".method("concat")

=> #<Method: String#concat>

"foo".method("concat").call("xxx")

=> "fooxxx"

But #send() is much simpler.

Btw, you know that you can do

testMethods = $mode.methods.select {|m| /^test/ =~ m}

or even

$mode.methods.select {|m| /^test/ =~ m}.each do |m|
  $mode.send m
end

or

$mode.methods.each do |m|
  $mode.send( m ) if /^test/ =~ m
end

But it's even more simple to use TestUnit for this...

Kind regards

    robert

···

On Thu, Sep 09, 2004 at 12:02:24AM +0900, Roeland Moors wrote:

> --
> Roeland
>
>