Read OpenStruct attribute name from variable

[Oliver Cromm]

Can't find that discussed anywhere, but maybe I just don't know how to
look.

I have lots of style parameters in an object. First, I implemented it as
a hash, so I have the method

def set_style(stylepars)
stylepars.each {|key, val| @style[key] = val}
end

Now I want to exchange the Hash for an OpenStruct, because it's much
easier on the eyes in statements like this:

sepline = @style['verticalsep'] + sepline +
@style['horizontalsep']*@style['padding'] +
@style['verticalsep'] if @style['box']

But how can I set "the attribute whose name is in the variable *key*"?

 

[Ara.T.Howard]

Can't find that discussed anywhere, but maybe I just don't know how to
look.

I have lots of style parameters in an object. First, I implemented it as
a hash, so I have the method

def set_style(stylepars)
stylepars.each {|key, val| @style[key] = val}
end

Now I want to exchange the Hash for an OpenStruct, because it's much
easier on the eyes in statements like this:

sepline = @style['verticalsep'] + sepline +
@style['horizontalsep']*@style['padding'] +
@style['verticalsep'] if @style['box']

But how can I set "the attribute whose name is in the variable *key*"?

key = 'foo'

value = open_struct.send 'foo'

open_struct.send "#{ foo }=", value

hth.

-a
--
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| email :: ara [dot] t [dot] howard [at] noaa [dot] gov
| phone :: 303.497.6469
| My religion is very simple. My religion is kindness.
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===============================================================================

 

[Oliver Cromm]

key = 'foo'

value = open_struct.send 'foo'

open_struct.send "#{ foo }=", value

hth.

A mathematics professor once told me that textbooks should contain
enough errors, so that students would have to spot them, and not get
lazy.
So, yes, after changing the obvious error, the above works fine, thanks.

open_struct.send "#{ key }=", value