Module: Arrow::HashUtilities

Included in:
Config, Config::ConfigStruct, Template, Template::Parser
Defined in:
lib/arrow/mixins.rb

Overview

A collection of utilities for working with Hashes.

Constant Summary collapse

HashMergeFunction =

Recursive hash-merge function

Proc.new {|key, oldval, newval|
	#debugMsg "Merging '%s': %s -> %s" %
	#	[ key.inspect, oldval.inspect, newval.inspect ]
	case oldval
	when Hash
		case newval
		when Hash
			#debugMsg "Hash/Hash merge"
			oldval.merge( newval, &HashMergeFunction )
		else
			newval
		end

	when Array
		case newval
		when Array
			#debugMsg "Array/Array union"
			oldval | newval
		else
			newval
		end

	when Arrow::Path
		if newval.is_a?( Arrow::Path )
			newval
		else
			Arrow::Path.new( newval )
		end

	else
		newval
	end
}

Class Method Summary collapse

Class Method Details

.stringify_keys(hash) ⇒ Object

Return a version of the given hash with its keys transformed into Strings from whatever they were before.



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# File 'lib/arrow/mixins.rb', line 50

def stringify_keys( hash )
	newhash = {}

	hash.each do |key,val|
		if val.is_a?( Hash )
			newhash[ key.to_s ] = stringify_keys( val )
		else
			newhash[ key.to_s ] = val
		end
	end

	return newhash
end

.symbolify_keys(hash) ⇒ Object Also known as: internify_keys

Return a duplicate of the given hash with its identifier-like keys transformed into symbols from whatever they were before.



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# File 'lib/arrow/mixins.rb', line 67

def symbolify_keys( hash )
	newhash = {}

	hash.each do |key,val|
		keysym = key.to_s.dup.untaint.to_sym

		if val.is_a?( Hash )
			newhash[ keysym ] = symbolify_keys( val )
		else
			newhash[ keysym ] = val
		end
	end

	return newhash
end