Module: Gitlab::Utils::InlineHash

Extended by:
InlineHash
Included in:
InlineHash
Defined in:
lib/gitlab/utils/inline_hash.rb

Instance Method Summary collapse

Instance Method Details

#merge_keys(hash, prefix: nil, connector: '.') ⇒ Object

Transforms a Hash into an inline Hash by merging its nested keys.

Input

{ 'root_param' => 'Root', 12 => 'number', symbol: 'symbol', nested_param: { key: 'Value' }, 'very' => { 'deep' => { 'nested' => { 12 => 'Deep nested value' } } } }

Result

{ 'root_param' => 'Root', 12 => 'number', symbol: symbol, 'nested_param.key' => 'Value', 'very.deep.nested.12' => 'Deep nested value' }



39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/gitlab/utils/inline_hash.rb', line 39

def merge_keys(hash, prefix: nil, connector: '.')
  result = {}
  pairs =
    if prefix
      base_prefix = "#{prefix}#{connector}"
      hash.map { |key, value| ["#{base_prefix}#{key}", value] }
    else
      hash.to_a
    end

  until pairs.empty?
    key, value = pairs.shift

    if value.is_a?(Hash)
      value.each { |k, v| pairs.unshift ["#{key}#{connector}#{k}", v] }
    else
      result[key] = value
    end
  end

  result
end