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Contents
class Array
# Converts an array, whose elements are also arrays, to a hash. Head
# (position 0) of each array is made to point at the rest of the array
# (tail), normally starting immediately after the head (position 1). The
# starting position of the tail can be controlled by an optional
# argument. Tails of 2 and more elements are represented as arrays.
#
def to_hash( tail_from = 1 )
self.reject { | e | e[0].nil? }.reduce({}) { |a, e|
tail = e[tail_from..-1]
a.merge( { e[0] => tail.size >= 2 ? tail : tail[0] } )
}
end
# Does things for each consecutive pair (expects a binary block).
#
def each_consecutive_pair
if block_given?
return self if ( n = self.size - 1 ) <= 0
n.times.with_index{|i| yield( self[i], self[i+1] ) }
return self
else
return Enumerator.new do |yielder|
n.times.with_index{|i| yielder << [ self[i], self[i+1] ] } unless
( n = self.size - 1 ) <= 0
end
end
end
# Allows style &[ function, *arguments ]
#
def to_proc
proc { |receiver| receiver.send *self }
end # def to_proc
# TEST ME
# def pretty_inspect
# each_slice( 4 ) { |slice|
# slice.map { |e|
# str = e.to_s[0..25]
# str + ' ' * ( 30 - str.size )
# }.reduce( :+ ) + "\n"
# }.reduce( :+ )
# end
end
Version data entries
12 entries across 12 versions & 1 rubygems