method

truncate

v7.0.0 - Show latest stable - 1 note - Class: String

truncate(truncate_at, options = {}) public

Truncates a given text after a given length if text is longer than length:

'Once upon a time in a world far far away'.truncate(27)
# => "Once upon a time in a wo..."

Pass a string or regexp :separator to truncate text at a natural break:

'Once upon a time in a world far far away'.truncate(27, separator: ' ')
# => "Once upon a time in a..."

'Once upon a time in a world far far away'.truncate(27, separator: /\s/)
# => "Once upon a time in a..."

The last characters will be replaced with the :omission string (defaults to “…”) for a total length not exceeding length:

'And they found that many people were sleeping better.'.truncate(25, omission: '... (continued)')
# => "And they f... (continued)"

Show source

# File activesupport/lib/active_support/core_ext/string/filters.rb, line 66
  def truncate(truncate_at, options = {})
    return dup unless length > truncate_at

    omission = options[:omission] || "..."
    length_with_room_for_omission = truncate_at - omission.length
    stop =        if options[:separator]
        rindex(options[:separator], length_with_room_for_omission) || length_with_room_for_omission
      else
        length_with_room_for_omission
      end

    +"#{self[0, stop]}#{omission}"
  end

August 4, 2011

1 thank

Examples out of order

The second and third examples should exchange places to fit with their explanations.

truncate

Related methods

Examples out of order