Appending a constant Array in the main app from a Rails engine

Question

yes, I want to append a CONSTANT,

I have an array that is stored as a constant in the mainapp, something like

class FOO
  ABILITY = [["xxxx","XX"],["yy","YYY"]]
end

above constant is used throughout the mainapp in various ways.

now, I have a rails engine that extends the mainapps abilities, and would like to extend the ABILITY array in the main app so if I where to do a

ABILITY.each

i would get an extra pair.

Without thinking, I just did a

class BAR
  FOO::ABILITY << ["zzzz","ZZZZ"]
end

of course this didn't do anything.

I have never considered appending a constant, which in its self seems like a bad thing to do, but considering the purpose of the RailsEngine, for it feels like an adequate idea, thanks in advance.

Chris Lewis · Answer 1 · 2012-12-03T11:47:34.910

0

class FOO
  ABILITY = [["xxx","XX"],["yy","yyyy"]]
end

class BAR
  T= FOO::ABILITY << ["zzz","ZZ"]
end

BAR::T
=> [["xxx", "XX"], ["yy", "yyyy"], ["zzz", "ZZ"]]

you were missing a "," in your ABILITY array. Does that help?

edited Dec 03 '12 at 11:47

answered Dec 03 '12 at 10:10

Chris Lewis

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sorry the comma missing was a typo – Saifis Dec 03 '12 at 10:45
Just cleaned up the output there. So does calling "BAR::T" append the info as you wanted? – Chris Lewis Dec 03 '12 at 11:47
it might, but in order to have the appended you would have to call BAR::T, which would not be usable because FOO::ABILITY has to be called. – Saifis Dec 03 '12 at 14:14

Appending a constant Array in the main app from a Rails engine

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