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%a{annotate:rdoc:skip}
class Array[unchecked out Elem]
# <!--
# rdoc-file=lib/abbrev.rb
# - abbrev(pattern = nil)
# -->
# Calculates the set of unambiguous abbreviations for the strings in `self`.
#
# require 'abbrev'
# %w{ car cone }.abbrev
# #=> {"car"=>"car", "ca"=>"car", "cone"=>"cone", "con"=>"cone", "co"=>"cone"}
#
# The optional `pattern` parameter is a pattern or a string. Only input strings
# that match the pattern or start with the string are included in the output
# hash.
#
# %w{ fast boat day }.abbrev(/^.a/)
# #=> {"fast"=>"fast", "fas"=>"fast", "fa"=>"fast", "day"=>"day", "da"=>"day"}
#
# Abbrev.abbrev(%w{car box cone}, "ca")
# #=> {"car"=>"car", "ca"=>"car"}
#
# See also Abbrev.abbrev
#
def abbrev: (?String | Regexp | nil) -> Hash[String, String]
end
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