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Contents
#
# Hash class additions
#
# Over time these may get depreciated in favor of other solutions.
#
class Hash
# Search for a key (potentially recursively) in a given hash.
#
# This method uses strict matching between string and symbol key types. They
# must be the same type or they will not match.
#
# * *Parameters*
# - [String, Symbol] *search_key* Key to search for in hash
# - [Hash<String, Symbol|ANY>] *options* Search options
# - [Boolean] *:recurse* Whether to recurse through sub hashes to find key value
# - [Integer] *:recurse_level* Maximum level to recurse into nested hashes or -1 for all
#
# * *Returns*
# - [ANY] Return value for search key if value found, nil otherwise
#
# * *Errors*
#
# See also:
# - Nucleon::Util::Data::interpolate
#
def search(search_key, options = {})
config = Nucleon::Config.ensure(options)
value = nil
recurse = config.get(:recurse, false)
recurse_level = config.get(:recurse_level, -1)
self.each do |key, data|
if key == search_key
value = data
elsif data.is_a?(Hash) &&
recurse && (recurse_level == -1 || recurse_level > 0)
recurse_level -= 1 unless recurse_level == -1
value = value.search(search_key,
Nucleon::Config.new(config).set(:recurse_level, recurse_level)
)
end
break unless value.nil?
end
return value
end
end
Version data entries
14 entries across 14 versions & 1 rubygems