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Contents
module HybridPlatformsConductor
# Provide an easy way to safe-merge hashes
module SafeMerge
# Safe-merge 2 hashes.
# Safe-merging is done by:
# * Merging values that are hashes.
# * Reporting errors when values conflict.
# When values are conflicting, the initial hash won't modify those conflicting values and will stop the merge.
#
# Parameters::
# * *hash* (Hash): Hash to be modified merging hash_to_merge
# * *hash_to_merge* (Hash): Hash to be merged into hash
# Result::
# * nil or Array<Object>: nil in case of success, or the keys path leading to a conflicting value in case of error
def safe_merge(hash, hash_to_merge)
conflicting_path = nil
hash_to_merge.each do |key, value_to_merge|
if hash.key?(key)
if hash[key].is_a?(Hash) && value_to_merge.is_a?(Hash)
sub_conflicting_path = safe_merge(hash[key], value_to_merge)
conflicting_path = [key] + sub_conflicting_path unless sub_conflicting_path.nil?
elsif hash[key] != value_to_merge
conflicting_path = [key]
end
else
hash[key] = value_to_merge
end
break unless conflicting_path.nil?
end
conflicting_path
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems