class ActiveRecord::Result

end
puts row + “ ” + row[‘body’]
result.each do |row|
# ActiveRecord::Result also includes Enumerable.
]
…
{“id” => 2, “title” => “title_2”, “body” => “body_2”},
# => [{“id” => 1, “title” => “title_1”, “body” => “body_1”},
result.to_a
# Get an array of hashes representing the result (column => value):
]
…
[2, “title_2”, “body_2”],
# => [[1, “title_1”, “body_1”],
result.rows
# Get the record values of the result:
# => [“id”, “title”, “body”]
result.columns
# Get the column names of the result:
result # => #<ActiveRecord::Result:0xdeadbeef>
result = ActiveRecord::Base.lease_connection.exec_query(‘SELECT id, title, body FROM posts’)
on any database connection adapter. For example:
This class encapsulates a result returned from calling
= Active Record Result
##

def self.empty(async: false) # :nodoc:

:nodoc: 
def self.empty(async: false) # :nodoc:
  if async
    EMPTY_ASYNC
  else
    EMPTY
  end
end

def [](idx) 

def [](idx)
  hash_rows[idx]
end

def cancel # :nodoc:

:nodoc: 
def cancel # :nodoc:
  self
end

def cast_values(type_overrides = {}) # :nodoc:

:nodoc: 
def cast_values(type_overrides = {}) # :nodoc:
  if columns.one?
    # Separated to avoid allocating an array per row
    type = if type_overrides.is_a?(Array)
      type_overrides.first
    else
      column_type(columns.first, 0, type_overrides)
    end
    rows.map do |(value)|
      type.deserialize(value)
    end
  else
    types = if type_overrides.is_a?(Array)
      type_overrides
    else
      columns.map.with_index { |name, i| column_type(name, i, type_overrides) }
    end
    rows.map do |values|
      Array.new(values.size) { |i| types[i].deserialize(values[i]) }
    end
  end
end

def column_indexes # :nodoc:

:nodoc: 
def column_indexes # :nodoc:
  @column_indexes ||= begin
    index = 0
    hash = {}
    length  = columns.length
    while index < length
      hash[columns[index]] = index
      index += 1
    end
    hash.freeze
  end
end

def column_type(name, index, type_overrides) 

def column_type(name, index, type_overrides)
  type_overrides.fetch(name) do
    column_types.fetch(index) do
      column_types.fetch(name, Type.default_value)
    end
  end
end

def each(&block)

Returns an +Enumerator+ if no block is given.

To get real hashes, use +.to_a.each+.

row as parameter. Each row is a Hash-like, read only object.
Calls the given block once for each element in row collection, passing 
def each(&block)
  if block_given?
    hash_rows.each(&block)
  else
    hash_rows.to_enum { @rows.size }
  end
end

def empty?

Returns true if there are no records, otherwise false. 
def empty?
  rows.empty?
end

def freeze # :nodoc:

:nodoc: 
def freeze # :nodoc:
  hash_rows.freeze
  indexed_rows.freeze
  super
end

def hash_rows 

def hash_rows
  # We use transform_values to rows.
  # This is faster because we avoid any reallocs and avoid hashing entirely.
  @hash_rows ||= @rows.map do |row|
    column_indexes.transform_values { |index| row[index] }
  end
end

def includes_column?(name)

Returns true if this result set includes the column named +name+ 
def includes_column?(name)
  @columns.include? name
end

def indexed_rows # :nodoc:

:nodoc: 
def indexed_rows # :nodoc:
  @indexed_rows ||= begin
    columns = column_indexes
    @rows.map { |row| IndexedRow.new(columns, row) }.freeze
  end
end

def initialize(columns, rows, column_types = nil) 

def initialize(columns, rows, column_types = nil)
  # We freeze the strings to prevent them getting duped when
  # used as keys in ActiveRecord::Base's @attributes hash
  @columns      = columns.each(&:-@).freeze
  @rows         = rows
  @hash_rows    = nil
  @column_types = column_types || EMPTY_HASH
  @column_indexes = nil
end

def initialize_copy(other) 

def initialize_copy(other)
  @rows = rows.dup
  @column_types = column_types.dup
  @hash_rows    = nil
end

def last(n = nil)

Returns the last record from the rows collection. 
def last(n = nil)
  n ? hash_rows.last(n) : hash_rows.last
end

def length

Returns the number of elements in the rows array. 
def length
  @rows.length
end

def result # :nodoc:

:nodoc: 
def result # :nodoc:
  self
end

def to_ary

Returns an array of hashes representing each row record. 
def to_ary
  hash_rows
end