Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]

Answer 1

Another approach:

@myvar = session[:comments][@comment.id]["temp_value"] rescue nil

This might also be consider a bit dangerous because it can hide too much, personally I like it.

If you want more control, you may consider something like:

def handle # just an example name, use what speaks to you
    raise $! unless $!.kind_of? NoMethodError # Do whatever checks or 
                                              # reporting you want
end
# then you may use
@myvar = session[:comments][@comment.id]["temp_value"] rescue handle