ruby_nested_hash_example.rb

# Ruby - A nested hash example
# Load each pair of args on the command-line as a key-value pair
# For example from CMD.exe:
# call ruby.exe ruby_nested_hash_example.rb Age 30 Name Mary Fav_Hobby Ataraxia Fav_Number 42
# Output would be:
    # {
      # "data_info": {
        # "types": {
          # "nums": {
            # "Age": 30,
            # "Fav_Number": 42
          # },
          # "strings": {
            # "Name": "Mary",
            # "Fav_Hobby": "Ataraxia"
          # }
        # },
        # "data_id": "13435436457"
      # }
    # }

    
if (ARGV.count % 2 != 0) || (ARGV.count < 2)
    STDERR.puts "You must provide an even amount of command-line args to make key-value pairs.\n"
    abort
end
require 'json'


cmd_hashes = {}
nums = {}
strings = {}
types = {}
#FYI `tl` == top-level
all_tl_keys = {}
data_info = {}
data_id = {:data_id => "13435436457"}


_key = ""
_value = ""
element = 0
ARGV.each do |i|
    if element % 2 == 0
        _key=i
    else
        if (i.to_i!=0) && (i!=0)
            _value=i.to_i
        else
            _value=i
        end
    end
    if (_key != "") && (_value != "")
        cmd_hashes.store(_key, _value)
        _key = ""
        _value = ""
    end
    element+=1
end


cmd_hashes.each do |key, value|
    if value.is_a? Numeric
        nums.store(key, value)
    else
        strings.store(key, value)
    end
end


if nums.size        > 0;    types.merge!(:nums => nums)                 end
if strings.size     > 0;    types.merge!(:strings => strings)           end
if types.size       > 0;    all_tl_keys.merge!(:types => types)         end
if data_id.size     > 0;    all_tl_keys.merge!(data_id)                 end
if all_tl_keys.size > 0;    data_info.merge!(:data_info => all_tl_keys) end


if data_info.size   > 0;    puts JSON.pretty_generate(data_info)        end