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# File 'lib/zipcoder/ext/array.rb', line 4
def combine_zips
zips = []
start = nil
last = nil
self.sort.each do |zip|
zip_int = zip.to_i
if start == nil
start = zip_int
last = zip_int
else
if zip_int == last+1
last = zip_int
else
if last == start
zips << start.to_zip
else
zips << "#{start.to_zip}-#{last.to_zip}"
end
start = zip_int
last = zip_int
end
end
end
if last == nil and start == nil
return ''
end
if last == start
zips << start.to_zip
else
zips << "#{start.to_zip}-#{last.to_zip}"
end
zips.join ","
end
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