On Sun, Feb 10, 2013 at 9:25 PM, Joel Pearson <[email protected]> wrote: > I've looked around but I couldn't find anything helpful on this, > although I'm sure it's been covered before: > Does Ruby have an equivalent to the "With / End With" syntax helper in > VB? It would be quite helpful when I need to execute a series of methods > on an object, but for various reasons (e.g. testing individual returns > or methods which may return nil) I don't want to chain them together. > > To illustrate, here's the VB syntax I'm referring to: > > With my_object > .do1 > .do2 > .do3 > End With
my_object.instance_eval do # self points to my_object here do1 do2 do3 end You can of course use a different method name, i.e. alias #instance_eval to #with. However, there is one gotcha foo.bar = 99 cannot be translated to foo.instance_eval do bar = 99 end because bar will be a local variable then. Instead you have to use foo.instance_eval do self.bar = 99 end Kind regards robert -- remember.guy do |as, often| as.you_can - without end http://blog.rubybestpractices.com/ -- [email protected] | https://groups.google.com/d/forum/ruby-talk-google?hl=en --- You received this message because you are subscribed to the Google Groups "ruby-talk-google" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
