Module: Improvise::Util::StringUtils

Defined in:
lib/improvise/util/stringutils.rb

Class Method Summary collapse

Class Method Details

.truncate(string, truncate_at, options = {}) ⇒ Object

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

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

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

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

truncate('Once upon a time in a world far far away', 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:

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

Adapted from Ruby on Rails (released under the MIT license)



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# File 'lib/improvise/util/stringutils.rb', line 24

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

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

    "#{string[0...stop]}#{options[:omission]}"
end