Class: RegexpExamples::BaseRepeater

Inherits:
Object
  • Object
show all
Defined in:
lib/regexp-examples/repeaters.rb

Overview

An abstract base class for all other repeater groups. Since all repeaters (quantifiers) are really just shorthand syntaxes for the generic: ‘/.a,b/`, the methods for generating “between `a` and `b` results” are fully generalised here.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(group) ⇒ BaseRepeater

Returns a new instance of BaseRepeater.



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# File 'lib/regexp-examples/repeaters.rb', line 8

def initialize(group)
  @group = group
end

Instance Attribute Details

#group ⇒ Object (readonly)

Returns the value of attribute group.



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# File 'lib/regexp-examples/repeaters.rb', line 7

def group
  @group
end

#max_repeats ⇒ Object (readonly)

Returns the value of attribute max_repeats.



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# File 'lib/regexp-examples/repeaters.rb', line 7

def max_repeats
  @max_repeats
end

#min_repeats ⇒ Object (readonly)

Returns the value of attribute min_repeats.



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# File 'lib/regexp-examples/repeaters.rb', line 7

def min_repeats
  @min_repeats
end

Instance Method Details

#random_result ⇒ Object 



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# File 'lib/regexp-examples/repeaters.rb', line 27

def random_result
  result = []
  rand(min_repeats..max_repeats).times { result << group.random_result }
  result << [GroupResult.new('')] if result.empty? # in case of 0.times
  RegexpExamples.permutations_of_strings(result)
end

#result ⇒ Object 



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# File 'lib/regexp-examples/repeaters.rb', line 12

def result
  group_results = group.result.first(RegexpExamples.max_group_results)
  results = []
  min_repeats.upto(max_repeats) do |repeats|
    if repeats.zero?
      results << [GroupResult.new('')]
    else
      results << RegexpExamples.permutations_of_strings(
        [group_results] * repeats
      )
    end
  end
  results.flatten.uniq
end