Basic ruby array code: Testing if an array has a specific integer

Question

I'm trying to test if an array has a specific integer in it. Right now I'm using this test;

 def admin?
    current_user.role_ids == [1,2] || current_user.role_ids == [2] || current_user.role_ids == [1,2,5]
  end

The code works, but I'd prefer to just test for the integer "2" rather than explicitly write out every possible combination of numbers containing "2". If you have any ruby advice I would really appreciate it. This is the best I could imagine on the fly.

Thanks!

Ciarán Walsh · Accepted Answer · 2009-12-30 19:23:00Z

9

Are you looking for Array#include??

current_user.role_ids.include?(2)

answered Dec 30, 2009 at 19:23

Ciarán Walsh

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2 Comments

Steve B. Over a year ago

Any difference between using include? or member? ? Is one considered slower or less idiomatic?

Ciarán Walsh Over a year ago

There’s little effective difference between the two, but include? is more common.

Ben · Accepted Answer · 2009-12-30 19:23:49Z

3

a = [1,2,3,4,5]
a.include?(2)

answered Dec 30, 2009 at 19:23

Ben

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