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Contents
module Pacer
module Core
module Route
def paths(*exts)
route = chain_route :transform => :path, :element_type => :path
if exts.any?
exts = exts.map { |e| Array.wrap(e) if e }
route.map(element_type: :path) do |path|
path.zip(exts).map { |element, ext| ext ? element.add_extensions(ext) : element }
end
else
route
end
end
end
end
module Transform
module Path
import com.tinkerpop.pipes.transform.PathPipe
def help(section = nil)
case section
when nil
puts <<HELP
Each path returned by this method represents each intermediate value that was
used to calculate the resulting value:
r = [1,2,3].to_route.map { |n| n*2 }
p = r.paths #=> #<Obj -> Obj-Map -> Path-Path>
p.to_a #=> [[1,1], [2,4], [3,6]]
This is especially useful for graph traversals.
g.v.out_e.in_v.out_e.in_v.paths.first #=> [#<V[37]>,
# #<E[41]:37-patcit-38>,
# #<V[38]>,
# #<E[40]:38-document-id-39>,
# #<V[39]>]
See:
:paths - for more details and general information about paths.
:arrays - for general operations that work on arrays or paths.
HELP
else
super
end
description
end
protected
def attach_pipe(end_pipe)
pipe = PathPipe.new
pipe.setStarts end_pipe if end_pipe
pipe
end
end
end
end
Version data entries
29 entries across 29 versions & 1 rubygems