Class: Necromancer::RangeConverters::StringToRangeConverter

Inherits:
Converter
  • Object
show all
Defined in:
lib/necromancer/converters/range.rb

Overview

An object that converts a String to a Range

Instance Attribute Summary

Attributes inherited from Converter

#config, #convert, #source, #target

Instance Method Summary collapse

Methods inherited from Converter

create, #initialize, #raise_conversion_type

Constructor Details

This class inherits a constructor from Necromancer::Converter

Instance Method Details

#call(value, strict: config.strict) ⇒ Object

Convert value to Range type with possible ranges

Examples:

converter.call("0,9")  # => (0..9)
converter.call("0-9")  # => (0..9)

Parameters:

  • value (Object) 


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# File 'lib/necromancer/converters/range.rb', line 34

def call(value, strict: config.strict)
  if match = value.match(SINGLE_DIGIT_MATCHER)
    digit = cast_to_num(match[:digit])
    ::Range.new(digit, digit)
  elsif match = value.match(DIGIT_MATCHER)
    open = cast_to_num(match[:open])
    close = cast_to_num(match[:close])
    ::Range.new(open, close, match[:sep].gsub(/\s*/, "") == "...")
  elsif match = value.match(LETTER_MATCHER)
    ::Range.new(match[:open], match[:close],
                match[:sep].gsub(/\s*/, "") == "...")
  else
    strict ? raise_conversion_type(value) : value
  end
end

#cast_to_num(str) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Convert range end to numeric value



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# File 'lib/necromancer/converters/range.rb', line 53

def cast_to_num(str)
  Integer(str)
rescue ArgumentError
  Float(str)
rescue ArgumentError
  nil
end