searching an array using another array of values in ruby

Question

So I have an array which shows which levels are allowed to do things.

allowed = ["user", "admin"]

There's another array that shows which groups a user belongs to.

groups = ["user", "crazy"]

What's the best way to search the allowed array for ANY of the groups a user belongs to? I know it's easy but I'm drawing a real blank here...

Nakilon · Accepted Answer · 2010-12-30 20:55:33Z

9

Just &:

allowed & groups

answered Dec 30, 2010 at 20:55

Nakilon

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3 Comments

Way better than my answer. +1

oh my gosh...let's all pretend this never happened ok ... ;-) Thanks!

it has a limit on when you can approve answers...had to wait 5 minutes. Thanks for everyone's help!

Brian Clapper · Accepted Answer · 2010-12-30 20:51:17Z

0

Convert to a set and do an intersection.

require 'set'

allowed = ["user", "admin"]
has = ["user", "print"]
puts(allowed.to_set.intersection(has.to_set)) # prints #<Set: {"user"}>

answered Dec 30, 2010 at 20:51

Brian Clapper

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