Testing if a hash has any of a number of keys
I was wondering if the开发者_如何学Pythonre was a better way to test if a hash has any keys from an array. I want to use it something like this:
keys = %w[k1 k2 k5 k6]
none = true if hash.key?(keys)
Or am I going to have to loop this?
No need to loop:
(hash.keys & keys).any? # => true
Explanation:
.keys
returns all keys in a hash as an array. &
intersects two arrays, returning any objects that exists in both arrays. Finally, .any?
checks if the array intersect has any values.
keys.any? { |i| hash.has_key? i }
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