Class: Opower::TimeSeries::SyntheticResult::TimeSeriesCalculator

Inherits:
Dentaku::Calculator
  • Object
show all
Defined in:
lib/time_series/results/synthetic_result.rb

Overview

Subclass of Dentaku’s calculator - adds math functions by default

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TimeSeriesCalculator

Returns a new instance of TimeSeriesCalculator.



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# File 'lib/time_series/results/synthetic_result.rb', line 45

def initialize
  super
  initialize_math_functions
end

Instance Method Details

#initialize_math_functions ⇒ Object

Initializes math functions provided by Ruby and places them into the calculator as functions. NOTE: You must wrap nested mathematical expressions in formulas or Dentaku will attempt to pass them as separate arguments into the lambda below! This method smells of :reek:NestedIterators

For example: Assume x = 1, y = 2 cos(x + y) is translated into cos(1, ‘add’, 2) - this calls Math.cos(1, ‘add’, 2) cos((x + y)) is translated into cos(3) - this correctly calls Math.cos(3)



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# File 'lib/time_series/results/synthetic_result.rb', line 59

def initialize_math_functions
  Math.methods(false).each do |method|
    math_method = Math.method(method)
    add_function(
        name: method,
        type: :numeric,
        signature: [:numeric],
        body: ->(*args) { math_method.call(*args) }
    )
  end
end