Module: StringMagic::Core::Transformation

Included in:
String, StringMagic
Defined in:
lib/string_magic/core/transformation.rb

Instance Method Summary collapse

Instance Method Details

#alternating_case ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 62

def alternating_case
  return '' if empty?
  each_char.with_index.map { |c, i| i.even? ? c.upcase : c.downcase }.join
end

#escape_html ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 91

def escape_html
  return '' if empty?
  CGI.escapeHTML(self)
end

#remove_duplicate_chars ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 67

def remove_duplicate_chars
  return '' if empty?
  each_char.to_a.uniq.join
end

#remove_duplicate_words ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 72

def remove_duplicate_words
  return '' if empty?
  split(/\s+/).uniq.join(' ')
end

#remove_html_tags ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 86

def remove_html_tags
  return '' if empty?
  gsub(/<[^>]*>/, '')
end

#reverse_words ⇒ Object

Simple word / char utilities



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# File 'lib/string_magic/core/transformation.rb', line 57

def reverse_words
  return '' if empty?
  split(/\s+/).reverse.join(' ')
end

#squeeze_whitespace ⇒ Object

Misc. text transformations



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# File 'lib/string_magic/core/transformation.rb', line 81

def squeeze_whitespace
  return '' if empty?
  gsub(/\s+/, ' ').strip
end

#to_camel_case(first_letter: :lower) ⇒ Object

first_letter: :lower (default) or :upper



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# File 'lib/string_magic/core/transformation.rb', line 30

def to_camel_case(first_letter: :lower)
  return '' if empty?

  words = to_snake_case.split('_').map(&:capitalize)
  words[0].downcase! if first_letter == :lower && words.any?
  words.join
end

#to_kebab_case ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 25

def to_kebab_case
  to_snake_case.tr('_', '-')
end

#to_pascal_case ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 38

def to_pascal_case
  to_camel_case(first_letter: :upper)
end

#to_snake_case ⇒ Object

Case conversions



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# File 'lib/string_magic/core/transformation.rb', line 12

def to_snake_case
  return '' if empty?

  str = dup
  str.gsub!(/::/, '/')
  str.gsub!(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
  str.gsub!(/([a-z\d])([A-Z])/,  '\1_\2')
  str.tr!('-', '_')
  str.gsub!(/\s+/, '_')
  str.downcase!
  str.squeeze('_').gsub(/^_+|_+$/, '')
end

#to_title_case ⇒ Object 



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# File 'lib/string_magic/core/transformation.rb', line 42

def to_title_case
  return '' if empty?

  small = %w[a an and as at but by for if in nor of on or so the to up yet]
  words = downcase.split(/\s+/)
  words.map!.with_index do |w, i|
    (i.zero? || i == words.size - 1 || !small.include?(w)) ? w.capitalize : w
  end
  words.join(' ')
end