e.g
hsh = {"abba"=>"papa","ddd"=>{"gole"=>"cfr","say"=>"111"},"second"=>{"again"=>{"last"=>"kkkkk"} }}
o/p should be =>
["abba", "ddd.gole", "ddd.say", "second.again.last"]
#===============================================================================
following is my code which is half working.
def convert_deep_hash_into_string_of_keys(cast,str)
str ||=[]
a = ""
cast.each do |k,v|
if v.is_a?(Hash)
a << k
convert_deep_hash_into_string_of_keys(v,a)
else
a << k
end
str << ".#{a}"
a = ""
end
str.each{|s| s.gsub!(/^\./,"")}
return str.reverse
end
hsh = {"abba"=>"papa","ddd"=>{"gole"=>"cfr","say"=>"111"},"second"=>{"again"=>{"last"=>"kkkkk"} }}
convert_deep_hash_into_string_of_keys(hsh,[])
o/p of above code => ["abba", "ddd.say.gole", "second.again.last"]
Refactorings
No refactoring yet !
Martin Plöger
July 27, 2009, July 27, 2009 12:59, permalink
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Hope this is right and reads (at least a bit ;-)) well...
Alternatively you could use Enumerable#map instead of Enumerable#collect (it is an alias but a little shorter => depends on your taste).
Also, I prefer checking for a method I'm calling instead of checking for the class (Duck Typing) => Better for testing/mocking etc. because you depend on a much smaller interface (just that method). Again, depends on your taste.
btw, why do you pass an Array as 2nd parameter? Do you need to concat the result to sth. else?
def convert x
x.keys.collect do |k|
[convert(x[k])].flatten.collect { |j| "#{k}#{".#{j}" if j}" }
end.flatten if x.respond_to? :keys
end
#or this
def convert x
x.keys.collect do |k|
(res = convert x[k]) ? res.collect { |j| "#{k}.#{j}" } : "#[k}"
end.flatten if x.respond_to? :keys
end
Desty Nova
August 6, 2009, August 06, 2009 21:48, permalink
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h = {"abba"=>"papa","ddd"=>{"gole"=>"cfr","say"=>"111"},"second"=>{"again"=>{"last"=>"kkkkk"} }}
def convert(h)
h.map{|k, v| v.is_a?(Hash) ? convert(v).map{|p| "#{k}.#{p}"} : k}.flatten
end
puts convert(h)
# =>
# second.again.last
# ddd.say
# ddd.gole
# abba
Martin Plöger
August 7, 2009, August 07, 2009 09:21, permalink
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@Desty Nova: Really nice, and great readability! Thumbs up!
pls refer Following e.g