Sha256: 41c30fd97aaba52d5869daac2b7da8f2547375005dafa4ae9e8ab20cfc263971
Contents?: true
Size: 1.25 KB
Versions: 5
Compression:
Stored size: 1.25 KB
Contents
class Array
# This is more advanced form of #join. It allows for fine control
# of separators.
#
# NOTE: The old version used to default its separator to ", " and
# default the terminating separator to " and ". This is no longer
# the case. You must specifically provide these parameters.
#
# [1,2,3].conjoin
# => "123"
#
# [1,2,3].conjoin(', ', ' and ')
# => "1, 2 and 3
#
# [1,2,3].conjoin(', ', :last => ' or ')
# => "1, 2 or 3
#
# [1,2,3].conjoin('; ', -1 => ' & ')
# => "1; 2 & 3
#
# [1,2,3,4].conjoin{ |i, a, b| i % 2 == 0 ? '.' : '-' }
# => "1.2-3.4"
#
# [1,1,2,2].conjoin{ |i, a, b| a == b ? '=' : '!=' }
# => "1=1!=2=2"
#
# CREDIT: Trans
def conjoin(*args, &block)
return first.to_s if size < 2
sep = []
if block_given?
(size - 1).times do |i|
sep << yield(i, *slice(i,2))
end
else
options = (Hash===args.last) ? args.pop : {}
separator = args.shift || ""
options[-1] = args.shift unless args.empty?
sep = [separator] * (size - 1)
if options.key?(:last)
options[-1] = options.delete(:last)
end
options[-1] ||= " and "
options.each{|i, s| sep[i] = s}
end
zip(sep).join
end
end
Version data entries
5 entries across 5 versions & 1 rubygems