Class: String

Inherits:
Object show all
Defined in:
lib/lite/ruby/string.rb,
lib/lite/ruby/safe/string.rb

Constant Summary collapse

TRANSLITERATIONS = 
YAML.load_file(
  File.expand_path('formats/string_transliterations.yml', File.dirname(__FILE__))
).freeze

Instance Method Summary collapse

Instance Method Details

#acronym ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 12

def acronym
  gsub(/(([a-zA-Z0-9])([a-zA-Z0-9])*)./, '\\2') || self
end

#acronym! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 16

def acronym!
  replace(acronym)
end

#any?(*keys) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lite/ruby/string.rb', line 20

def any?(*keys)
  keys.any? { |key| include?(key) }
end

#at(position) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 5

def at(position)
  self[position]
end

#camelize(first_letter = :upper) ⇒ Object Also known as: camelcase 



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# File 'lib/lite/ruby/safe/string.rb', line 9

def camelize(first_letter = :upper)
  case first_letter
  when :upper, true then modulize.gsub(/(\A|\s)([a-z])/) { $1 + $2.upcase }
  when :lower, false then modulize.gsub(/(\A|\s)([A-Z])/) { $1 + $2.downcase }
  else modulize
  end
end

#camelize!(first_letter = :upper) ⇒ Object Also known as: camelcase! 



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# File 'lib/lite/ruby/string.rb', line 24

def camelize!(first_letter = :upper)
  replace(camelize(first_letter))
end

#capitalized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lite/ruby/string.rb', line 28

def capitalized?
  capitalize == self
end

#classify ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 17

def classify
  str = dup
  str.sub!(/.*\./, '')
  str.camelize!
  str || self
end

#classify! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 32

def classify!
  replace(classify)
end

#constantize ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 24

def constantize
  Object.const_get(camelize)
end

#dasherize ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 28

def dasherize
  underscore.tr('_', '-')
end

#dasherize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 36

def dasherize!
  replace(dasherize)
end

#deconstantize ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 32

def deconstantize
  [0, rindex('::') || 0]
end

#deconstantize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 40

def deconstantize!
  replace(deconstantize)
end

#dedupe(pattern) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 44

def dedupe(pattern)
  dup.dedupe!(pattern)
end

#dedupe!(pattern) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 48

def dedupe!(pattern)
  pattern.each_char { |char| gsub!(/#{Regexp.escape(char)}{2,}/, char) }
  self
end

#demodulize ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 36

def demodulize
  gsub(/^.*::/, '')
end

#demodulize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 53

def demodulize!
  replace(demodulize)
end

#domain ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 57

def domain
  return if empty?

  URI.join(self, '/').to_s.chomp('/')
rescue URI::BadURIError, URI::InvalidURIError
  nil
end

#downcase? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lite/ruby/string.rb', line 65

def downcase?
  downcase == self
end

#each_word(&block) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 69

def each_word(&block)
  words.each(&block)
end

#ellipsize(ellipsize_at, options = {}) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 73

def ellipsize(ellipsize_at, options = {})
  return self if length <= ellipsize_at

  separator = options[:separator] || '...'
  offset = options[:offset] || 4

  "#{self[0, offset]}#{separator}#{self[-offset, offset]}"
end

#first(limit = 1) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 40

def first(limit = 1)
  if limit.zero?
    ''
  elsif limit >= length
    self
  else
    to(limit - 1)
  end
end

#format(*args) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 90

def format(*args)
  super(self, *args.flatten)
end

#fragment ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 82

def fragment
  return if empty?

  URI.parse(self).fragment
rescue URI::BadURIError, URI::InvalidURIError
  nil
end

#from(position) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 50

def from(position)
  self[position..-1]
end

#headerize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 94

def headerize
  squish.each_word(&:capitalize!).join(' ')
end

#headerize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 98

def headerize!
  replace(headerize)
end

#host ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 102

def host
  return if empty?

  URI.parse(self).host
rescue URI::BadURIError, URI::InvalidURIError
  nil
end

#humanize(capitalize: true) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 54

def humanize(capitalize: true)
  str = dup
  str.underscore!
  str.delete_suffix!('_id')
  str.tr!('_', ' ')
  str.squish!
  str.gsub!(/([a-z\d]*)/i, &:downcase)
  str.gsub!(/\A\w/) { |s| capitalize ? s.upcase : s }
  str || self
end

#humanize!(capitalize: true) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 110

def humanize!(capitalize: true)
  replace(humanize(capitalize: capitalize))
end

#indent(amount, seperator = ' ') ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 65

def indent(amount, seperator = ' ')
  dup.indent!(amount, seperator)
end

#indent!(amount, seperator = ' ') ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 69

def indent!(amount, seperator = ' ')
  if amount >= 0
    gsub!(/^/, seperator * amount)
  else
    gsub!(/^#{Regexp.escape(seperator)}{0,#{-amount}}/, '')
  end
end

#index_all(pattern) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 114

def index_all(pattern)
  pattern = pattern.to_s if pattern.is_a?(Numeric)
  arr_indexes = []
  srch_index = rindex(pattern)

  while srch_index
    temp_string = self[0..(srch_index - 1)]
    arr_indexes << srch_index
    srch_index = srch_index.zero? ? nil : temp_string.rindex(pattern)
  end

  arr_indexes.reverse
end

#labelize(capitalize: true) ⇒ Object Also known as: labelcase 



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# File 'lib/lite/ruby/string.rb', line 128

def labelize(capitalize: true)
  dup.labelize!(capitalize: capitalize)
end

#labelize!(capitalize: true) ⇒ Object Also known as: labelcase! 



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# File 'lib/lite/ruby/string.rb', line 132

def labelize!(capitalize: true)
  underscore!
  tr!('_', ' ')
  squish!
  gsub!(/([a-z\d]*)/i, &:downcase)
  gsub!(/\A\w/) { |str| capitalize ? str.upcase : str }
  gsub!(/ id\z/, ' ID') || self
end

#last(limit = 1) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 77

def last(limit = 1)
  if limit.zero?
    ''
  elsif limit >= length
    self
  else
    from(-limit)
  end
end

#lchomp(match) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 141

def lchomp(match)
  dup.lchomp!(match)
end

#lchomp!(match) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 145

def lchomp!(match)
  return self unless index(match)

  self[0...match.size] = ''
  self
end

#methodize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 152

def methodize
  dup.methodize!
end

#methodize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 156

def methodize!
  gsub!(/([A-Z]+)([A-Z])/, '\1_\2')
  gsub!(/([a-z])([A-Z])/, '\1_\2')
  gsub!('/', '__')
  gsub!('::', '__')
  downcase! || self
end

#mixedcase? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lite/ruby/string.rb', line 175

def mixedcase?
  !upcase? && !downcase?
end

#modulize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 164

def modulize
  dup.modulize!
end

#modulize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 168

def modulize!
  gsub!(/__(.?)/) { "::#{$1.upcase}" }
  gsub!(%r{/(.?)}) { "::#{$1.upcase}" }
  gsub!(/(?:_+|-+)([a-z])/) { $1.upcase }
  gsub!(/(\A|\s)([a-z])/) { $1 + $2.upcase } || self
end

#non_possessive ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 179

def non_possessive
  dup.non_possessive!
end

#non_possessive! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 183

def non_possessive!
  return self unless possessive?

  chomp!("'s") || chomp!("'") || self
end

#ordinal ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 189

def ordinal
  to_i.ordinal
end

#ordinalize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 193

def ordinalize
  to_i.ordinalize
end

#parameterize(separator: '-') ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 87

def parameterize(separator: '-')
  str = dup
  str.underscore!
  str.gsub!(/\s+/, separator)
  str.downcase!
  str || self
end

#parameterize!(separator: '-') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 197

def parameterize!(separator: '-')
  replace(parameterize(separator: separator))
end

#path ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 201

def path
  return if empty?

  URI.parse(self).path
rescue URI::BadURIError, URI::InvalidURIError
  nil
end

#pathize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 209

def pathize
  dup.pathize!
end

#pathize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 213

def pathize!
  gsub!(/([A-Z]+)([A-Z])/, '\1_\2')
  gsub!(/([a-z])([A-Z])/, '\1_\2')
  gsub!('__', '/')
  gsub!('::', '/')
  gsub!(/\s+/, '')
  gsub!(/[?%*:|"<>.]+/, '')
  downcase! || self
end

#pollute(delimiter = '^--^--^') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 223

def pollute(delimiter = '^--^--^')
  chars.map { |chr| "#{chr}#{delimiter}" }.join
end

#pollute!(delimiter = '^--^--^') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 227

def pollute!(delimiter = '^--^--^')
  replace(pollute(delimiter))
end

#pop ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 231

def pop
  self[-1]
end

#possessive ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 235

def possessive
  return self if possessive?

  possession = end_with?('s') ? "'" : "'s"
  "#{self}#{possession}"
end

#possessive! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 242

def possessive!
  replace(possessive)
end

#possessive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lite/ruby/string.rb', line 246

def possessive?
  %w['s s'].any? { |pos| end_with?(pos) }
end

#push(string) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 250

def push(string)
  replace(concat(string))
end

#query ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 254

def query
  return if empty?

  URI.parse(self).query
rescue URI::BadURIError, URI::InvalidURIError
  nil
end

#quote(type = :double, amount = nil) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength



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# File 'lib/lite/ruby/string.rb', line 263

def quote(type = :double, amount = nil)
  if type.is_a?(Integer)
    tmp = amount
    amount = type
    type = tmp || :mixed
  else
    amount ||= 1
  end

  case type.to_s
  when "'", 'single', 's', '1'
    f = "'" * amount
    b = f
  when '"', 'double', 'd', '2'
    f = '"' * amount
    b = f
  when '`', 'back', 'backtick', 'b', '-1'
    f = '`' * amount
    b = f
  when "`'", 'bracket', 'sb'
    f = '`' * amount
    b = "'" * amount
  when "'\"", 'mixed', 'm', 'Integer'
    c = (amount.to_f / 2).to_i
    f = '"' * c
    b = f

    if amount.odd?
      f = "'#{f}"
      b += "'"
    end
  else
    raise ArgumentError, "Invalid quote type: #{type.inspect}"
  end

  "#{f}#{self}#{b}"
end

#quote!(type = :double, amount = nil) ⇒ Object

rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength



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# File 'lib/lite/ruby/string.rb', line 302

def quote!(type = :double, amount = nil)
  replace(quote(type, amount))
end

#remove(*patterns) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 95

def remove(*patterns)
  dup.remove!(*patterns)
end

#remove!(*patterns) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 99

def remove!(*patterns)
  patterns.each_with_object(self) do |pat, str|
    pat.is_a?(Range) ? str.slice!(pat) : str.gsub!(pat, '')
  end
end

#remove_tags ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 306

def remove_tags
  dup.remove_tags!
end

#remove_tags! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 310

def remove_tags!
  gsub!(%r{</?[^>]*>}, '') || self
end

#rotate(amount = 1) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 314

def rotate(amount = 1)
  dup.rotate!(amount)
end

#rotate!(amount = 1) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 318

def rotate!(amount = 1)
  amount += size if amount.negative?
  slice!(amount, size - amount) + slice!(0, amount)
end

#safe_encode(target_encoding, replacement = '') ⇒ Object

rubocop:disable Metrics/MethodLength



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# File 'lib/lite/ruby/string.rb', line 324

def safe_encode(target_encoding, replacement = '')
  encode(target_encoding)
rescue Encoding::InvalidByteSequenceError
  force_encoding(target_encoding).scrub!(replacement)
rescue Encoding::UndefinedConversionError
  encode(
    target_encoding,
    invalid: :replace,
    undef: :replace,
    replace: replacement,
    UNIVERSAL_NEWLINE_DECORATOR: true
  )
end

#safe_encode!(target_encoding, replacement = '') ⇒ Object

rubocop:enable Metrics/MethodLength



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# File 'lib/lite/ruby/string.rb', line 339

def safe_encode!(target_encoding, replacement = '')
  replace(safe_encode(target_encoding, replacement))
end

#sample(separator = ' ') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 343

def sample(separator = ' ')
  split(separator).sample
end

#sample!(separator = ' ') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 347

def sample!(separator = ' ')
  replace(sample(separator))
end

#scheme ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 351

def scheme
  return if empty?

  URI.parse(self).scheme
rescue URI::BadURIError, URI::InvalidURIError
  nil
end

#shift(*patterns) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 359

def shift(*patterns)
  dup.shift!(*patterns)
end

#shift!(*patterns) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 363

def shift!(*patterns)
  return self[0] if patterns.empty?

  patterns.each_with_object(self) { |pat, str| str.sub!(pat, '') }
end

#shuffle(separator = '') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 369

def shuffle(separator = '')
  split(separator).shuffle.join
end

#shuffle!(separator = '') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 373

def shuffle!(separator = '')
  replace(shuffle(separator))
end

#sift(keep) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 377

def sift(keep)
  keep = case keep
         when String then keep.chars
         when Array then keep.map(&:to_s)
         when Range then keep.to_a.map(&:to_s)
         else raise TypeError, "Invalid parameter: #{keep.inspect}"
         end

  chars.keep_if { |chr| keep.include?(chr) }.join
end

#sift!(keep) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 388

def sift!(keep)
  replace(sift(keep))
end

#slugify ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 392

def slugify
  dup.slugify!
end

#slugify! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 396

def slugify!
  gsub!(/[^\x00-\x7F]+/, '')
  gsub!(/[^\w \-]+/i, '')
  gsub!(/[ \-]+/i, '-')
  gsub!(/^-|-$/i, '')
  downcase! || self
end

#sort ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 404

def sort
  chars.sort.join
end

#sort! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 408

def sort!
  replace(sort)
end

#squish ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 105

def squish
  dup.squish!
end

#squish! ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 109

def squish!
  strip!
  gsub!(/\s+/, ' ') || self
end

#titleize ⇒ Object Also known as: titlecase 



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# File 'lib/lite/ruby/safe/string.rb', line 114

def titleize
  str = dup
  str.underscore!
  str.humanize!
  str.gsub!(/\b(?<!['’`])[a-z]/) { $&.capitalize }
  str || self
end

#titleize! ⇒ Object Also known as: titlecase! 



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# File 'lib/lite/ruby/string.rb', line 420

def titleize!
  replace(titleize)
end

#to(position) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 122

def to(position)
  self[0..position]
end

#to_time(form = :local) ⇒ Object Also known as: to_t

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity rubocop:disable Metrics/MethodLength, Metrics/PerceivedComplexity



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# File 'lib/lite/ruby/safe/string.rb', line 128

def to_time(form = :local)
  parts = Date.parse(self, false)
  used_keys = %i[year mon mday hour min sec sec_fraction offset]
  return if (parts.keys & used_keys).empty?

  now = Time.now
  time = Time.new(
    parts[:year] || now.year,
    parts[:mon] || now.month,
    parts[:mday] || now.day,
    parts[:hour] || 0,
    parts[:min] || 0,
    (parts[:sec] || 0) + (parts[:sec_fraction] || 0),
    parts[:offset] || (form == :utc ? 0 : nil)
  )

  form == :utc ? time.utc : time.to_time
end

#transliterize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 412

def transliterize
  TRANSLITERATIONS.each_with_object(dup) { |(k, v), s| s.gsub!(k, v) }
end

#transliterize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 416

def transliterize!
  replace(transliterize)
end

#truncate(truncate_at, options = {}) ⇒ Object

rubocop:enable Metrics/MethodLength, Metrics/PerceivedComplexity rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity



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# File 'lib/lite/ruby/safe/string.rb', line 149

def truncate(truncate_at, options = {})
  return self unless length > truncate_at

  omission = options[:omission] || '...'
  seperator = options[:separator]
  size_with_room_for_omission = truncate_at - omission.length
  stop = rindex(seperator || '', size_with_room_for_omission) if seperator
  "#{self[0, stop || size_with_room_for_omission]}#{omission}"
end

#truncate_words(words_count, options = {}) ⇒ Object 



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# File 'lib/lite/ruby/safe/string.rb', line 159

def truncate_words(words_count, options = {})
  sep = options[:separator] || /\s+/
  sep = Regexp.escape(sep.to_s) unless sep.is_a?(Regexp)
  return dup unless self =~ /\A((?>.+?#{sep}){#{words_count - 1}}.+?)#{sep}.*/m

  $1 + (options[:omission] || '...')
end

#underscore ⇒ Object Also known as: snakecase 



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# File 'lib/lite/ruby/safe/string.rb', line 167

def underscore
  str = dup
  str.camelize!
  str.gsub!(/::/, '/')
  str.gsub!(/([A-Z\d]+)([A-Z][a-z])/, '\1_\2')
  str.gsub!(/([a-z\d])([A-Z])/, '\1_\2')
  str.tr!('-', '_')
  str.downcase!
  str || self
end

#underscore! ⇒ Object Also known as: snakecase! 



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# File 'lib/lite/ruby/string.rb', line 428

def underscore!
  replace(underscore)
end

#unpollute(delimiter = '^--^--^') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 432

def unpollute(delimiter = '^--^--^')
  dup.unpollute!(delimiter)
end

#unpollute!(delimiter = '^--^--^') ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 436

def unpollute!(delimiter = '^--^--^')
  gsub!(delimiter, '') || self
end

#unquote ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 440

def unquote
  dup.unquote!
end

#unquote! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 444

def unquote!
  [0, -1].each do |i|
    case self[i, 1]
    when "'", '"', '`' then self[i] = ''
    end
  end

  self
end

#unshift(*patterns) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 454

def unshift(*patterns)
  patterns.each_with_object('') { |pat, str| str << pat }
          .concat(self)
end

#unshift!(*patterns) ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 459

def unshift!(*patterns)
  replace(unshift(*patterns))
end

#upcase? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lite/ruby/string.rb', line 424

def upcase?
  upcase == self
end

#variablize ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 476

def variablize
  "@#{gsub(/\W/, '_')}"
end

#variablize! ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 480

def variablize!
  replace(variablize)
end

#words ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 463

def words
  split(/\s+/)
end

#words_without_punctuation ⇒ Object 



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# File 'lib/lite/ruby/string.rb', line 467

def words_without_punctuation
  str = dup
  str.gsub!(%r{[.?¿¡…!,:：;—"。？！、‘“”„«»〈〉《》，/\[\]]}, ' ')
  str.gsub!('- ', ' ')
  str.squeeze!(' ')
  str.strip!
  str.words
end