class Dentaku::FlatHash
Public Class Methods
expand(hash)
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# File lib/dentaku/flat_hash.rb, line 29 def self.expand(hash) hash.each_with_object({}) do |(k, v), r| hash_levels = k.to_s.split('.') hash_levels = hash_levels.map(&:to_sym) if k.is_a?(Symbol) child_hash = hash_levels[0...-1].reduce(r) { |h, n| h[n] ||= {} } child_hash[hash_levels.last] = v end end
flatten_key(segments)
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# File lib/dentaku/flat_hash.rb, line 22 def self.flatten_key(segments) return segments.first if segments.length == 1 key = segments.join('.') key = key.to_sym if segments.first.is_a?(Symbol) key end
flatten_keys(hash)
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# File lib/dentaku/flat_hash.rb, line 16 def self.flatten_keys(hash) hash.each_with_object({}) do |(k, v), h| h[flatten_key(k)] = v end end
from_hash(h, key = [], acc = {})
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# File lib/dentaku/flat_hash.rb, line 3 def self.from_hash(h, key = [], acc = {}) return acc.update(key => h) unless h.is_a? Hash h.each { |k, v| from_hash(v, key + [k], acc) } flatten_keys(acc) end
from_hash_with_intermediates(h, key = [], acc = {})
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# File lib/dentaku/flat_hash.rb, line 9 def self.from_hash_with_intermediates(h, key = [], acc = {}) acc.update(key => h) unless key.empty? return unless h.is_a? Hash h.each { |k, v| from_hash_with_intermediates(v, key + [k], acc) } flatten_keys(acc) end