Module: HashOp::Merge

Defined in:
lib/hash_op/merge.rb

Class Method Summary collapse

Class Method Details

.by_group(hashes, key) ⇒ Object

Merge hashes by grouping them on the specified key value and merging them all together.



15
16
17
18
 
# File 'lib/hash_op/merge.rb', line 15

def by_group(hashes, key)
  groups = hashes.group_by { |h| h[key] }
  groups.values.map { |g| flat(g) }
end

.flat(hashes) ⇒ Object

Merge all specified hashes by merging the second in the first, the third in the result, and so on.



6
7
8
9
10
 
# File 'lib/hash_op/merge.rb', line 6

def flat(hashes)
  hashes.inject({}) do |result, hash|
    result.merge hash
  end
end