I have a hash such as:
CHAR_MAP = {
:x => %w[something]
:y => %w[something2 something]
:z => %w[something3 something1]
:r => %w[something something3]
...
...
}
And I have another array
x = ['something', 'something3']
Now for the hash CHAR_MAP
I want a list of keys for which all the values in it's corresponding value array
are a part of the array x
So for array x
we should get the keys x
and r
as output
@recommendation_factors.each do |rf|
@rec_list = CHAR_MAP.detect{|h| h == rf.recommendation_factor}
end
I tried the above but it keeps on returning an empty array. :/
试试这个
CHAR_MAP.keys.select { |k| (CHAR_MAP[k] - x).empty? }
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