ruby match string to array of strings [duplicate]

Question

Possible Duplicate:
In Ruby, how do I find out if a string is not in an array?

Right now I have this code:

partial_update = true if session[:intended_params][:controller] == 'foo'
partial_update = true if session[:intended_params][:controller] == 'bar'
partial_update = true if session[:intended_params][:controller] == 'ding'
partial_update = true if session[:intended_params][:controller] == 'dong'
partial_update = true if session[:intended_params][:controller] == 'up'
partial_update = true if session[:intended_params][:controller] == 'down'
partial_update = true if session[:intended_params][:controller] == 'bing'
# ETC.

I would like to change this to

array = %w[foo bar ding dong up down bing]
partial_update = true if session[:intended_params][:controller]  == array.any_of_the_possibilites

Is there a good way to do this?

maerics · Accepted Answer · 2012-10-15 17:31:19Z

6

Use the Ruby Array (Enumerable) include? method:

array = %w[foo bar ding dong up down bing]
partial_update = true if array.include?(session[:intended_params][:controller])

edited Oct 15, 2012 at 17:31

answered Oct 15, 2012 at 15:33

maerics

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2 Comments

Victor Moroz Over a year ago

not exactly equivalent to what OP expected as it will assign false if none match (not saying original behavior is right)

maerics Over a year ago

@VictorMoroz: ah, true, i'll modify slightly.

Victor Moroz · Accepted Answer · 2012-10-15 17:23:50Z

1

case session[:intended_params][:controller]
when *%w[foo bar ding dong up down bing]
  partial_update =  true
end

might be abusing case statement though

answered Oct 15, 2012 at 17:23

Victor Moroz

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