Method: String#squash

Defined in:
lib/ruby_core_extensions/string.rb

#squash(limit) ⇒ Object

Squash will reduce words from the end of the string to 3 characters until it fits within the limit, shrinking all words evenly. Where not all words can be shrunk evenly, the last words will be reduced by 1 Until within the limit e.g. “Adelaide University”.squash(30)

> “Adelaide University”

“Adelaide University”.squash(10)

> “Adela Univ”

“Adelaide University”.squash(7)

> “Ade Uni”

“Adelaide University”.squash(3)

> “AU”

“Adelaide University”.squash(2)

> “AU”

“Adelaide University”.squash(1)

> “A”



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# File 'lib/ruby_core_extensions/string.rb', line 39

def squash(limit)
  return self if size <= limit

  words = split(' ')

  # Return first letter of <limit> words
  return words.first(limit).map { |w| w.chars.first }.join if (words.size * 2 - 1) >= limit

  spaces = words.size - 1
  word_char_min = (limit - spaces) / words.size
  word_char_max = word_char_min + 1

  words = words.map { |word| word[0..(word_char_max - 1)] }

  words.reverse.each.with_index do |word, index|
    letters_to_remove = words.join(' ').size - limit

    letters_to_keep = if (last_case = (letters_to_remove <= (word.size - word_char_min)))
      word.size - letters_to_remove # Removing final characters
    else
      word_char_min
    end

    # Replace word
    words[words.size - index - 1] = word[0..(letters_to_keep - 1)]

    break if last_case
  end

  words.join(' ')
end