So I have an array which shows which levels are allowed to do things. <pre class="prettyprint"><code>allowed = ["user", "admin"] </code></pre> There's another array that shows which groups a user belongs to. <pre class="prettyprint"><code>groups = ["user", "crazy"] </code></pre> 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...

Just <code>&</code>: <pre class="prettyprint"><code>allowed & groups </code></pre>

searching an array using another array of values in ruby

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...

Just &:

allowed & groups