Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/ddbcli/ddb-rubyext.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args, &block) ⇒ Object 



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# File 'lib/ddbcli/ddb-rubyext.rb', line 34

def method_missing(method_name, *args, &block)
  case method_name.to_s
  when /=\Z/
    self.each {|i| i[method_name.to_s.sub(/=\Z/, '')] = *args }
    self
  else
    self.map {|i| i[method_name.to_s] }
  end
end

Instance Method Details

#avg ⇒ Object 



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# File 'lib/ddbcli/ddb-rubyext.rb', line 6

def avg
  self.sum / self.length
end

#group_by(name, &block) ⇒ Object 



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# File 'lib/ddbcli/ddb-rubyext.rb', line 10

def group_by(name, &block)
  item_h = {}

  self.each do |item|
    key = item[name.to_s]
    item_h[key] ||= []
    item_h[key] << item
  end

  return item_h unless block

  new_item_h = {}

  item_h.each do |key, item_list|
    if block.arity == 2
      new_item_h[key] = block.call(item_listm key)
    else
      new_item_h[key] = block.call(item_list)
    end
  end

  return new_item_h
end

#sum ⇒ Object 



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# File 'lib/ddbcli/ddb-rubyext.rb', line 2

def sum
  self.inject {|r, i| r + i }
end