Class: ReduceContext

Inherits:

Object

• Object
• ReduceContext

Defined in:

lib/learn_mapreduce.rb

Overview

The context within the reducer Used to give a custom ‘emit’ function

Instance Attribute Summary

• #output ⇒ Object

  Returns the value of attribute output.

Instance Method Summary

• #emit(value) ⇒ Object
• #initialize ⇒ ReduceContext constructor

  A new instance of ReduceContext.

Constructor Details

#initialize ⇒ ReduceContext

Returns a new instance of ReduceContext.

# File 'lib/learn_mapreduce.rb', line 65

def initialize
   @output = []
end

Instance Attribute Details

#output ⇒ Object

Returns the value of attribute output.

# File 'lib/learn_mapreduce.rb', line 63

def output
  @output
end

Instance Method Details

#emit(value) ⇒ Object

# File 'lib/learn_mapreduce.rb', line 69

def emit value
   @output.push(value)
end