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require "active_support/multibyte"
class String
def at(position)
self[position]
end
def from(position)
self[position..-1]
end
def to(position)
self[0..position]
end
def first(limit = 1)
if limit == 0
''
elsif limit >= size
self
else
to(limit - 1)
end
end
def last(limit = 1)
if limit == 0
''
elsif limit >= size
self
else
from(-limit)
end
end
end
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