Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/hash_tools.rb

Instance Method Summary collapse

Instance Method Details

#create_empty_node(path) ⇒ Object 



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# File 'lib/hash_tools.rb', line 57

def create_empty_node(path)
  return false if not find_by_path(path).nil?
  update_by_path_wo_parents(path, {})
end

#create_path_if_not_exist(path) ⇒ Object 



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# File 'lib/hash_tools.rb', line 62

def create_path_if_not_exist(path)
  aa = path_to_a(path)
  new_aa = []
  aa.each do |a|
    new_aa << a
    create_empty_node(a_to_path(new_aa))
  end
end

#find_by_path(path) ⇒ Object

Finds value in hash by path example: hash = {

a => 'foo',
b => {
  ba => {
  bac => 'bar'
  }
}

}



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# File 'lib/hash_tools.rb', line 14

def find_by_path(path)
  e ="self"
  path_to_a(path).each{|i| e = e+"['#{i}']" }
  begin 
    eval(e)
  rescue NoMethodError
    return nil
  end
end

#next_path(path) ⇒ Object 



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# File 'lib/hash_tools.rb', line 87

def next_path(path)
  paths = self.paths
  paths[paths.index(path) + 1]
end

#nodes_array(path = []) ⇒ Object 



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# File 'lib/hash_tools.rb', line 71

def nodes_array(path = [])
  ret = []
  self.each do |key,value|
    if value.class == Hash
      ret = ret + value.nodes_array(path + [key])
    else
      ret << path + [key]
    end
  end
  ret
end

#paths ⇒ Object 



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# File 'lib/hash_tools.rb', line 83

def paths
  self.nodes_array.map{|i| i.join(".")}
end

#previous_path(path) ⇒ Object 



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# File 'lib/hash_tools.rb', line 92

def previous_path(path)
  paths = self.paths
  paths[paths.index(path) - 1]
end

#update_by_path(path, string) ⇒ Object 



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# File 'lib/hash_tools.rb', line 25

def update_by_path(path, string)
  return false if find_by_path(path).class == "Hash"
  create_path_if_not_exist(path)
  e ="self"
  path_a = path_to_a(path)
  path_a.each{|i| e = e+"['#{i}']" }
  string = string.gsub(/^[ \t]+/,"")
  e = e+"='#{string}'"
  begin
    eval(e)
    return true
  rescue => e
    return [false, e]
 end
end

#update_by_path_wo_parents(path, string) ⇒ Object 



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# File 'lib/hash_tools.rb', line 42

def update_by_path_wo_parents(path, string)
  return false if find_by_path(path).class.to_s == "Hash" && find_by_path(path).length > 0
  e ="self"
  path_a = path_to_a(path)
  path_a.each{|i| e = e+"['#{i}']" }
  #string = string.gsub(/^[ \t]+/,"")
  e = e+"=string"
  begin
    eval(e)
    return true
  rescue
    return false
  end
end