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import matryoshka.data.Fix
import org.opencypher.spark.prototype.api.cyphertype.UnFixable.RecursiveExtractor
import matryoshka.Recursive
import shapeless.ops.hlist.Tupler

import scala.language.higherKinds
import scala.reflect.ClassTag
import scalaz.Functor

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                                                   (in kleene logic K3)
                                                   goal: NOT x OR y
r.blocked x=exists(r.blocked) y=r.blocked <> true  goal: x IMPLIES y suggestion: X AND NOT R.BLOCKED
true      true                false                false             true AND NOT true  => false
false     true                true                 true              true AND NOT false => true
null      false               null                 true              false AND NOT null => false !!! Here is the difference

Here's another alternative for lukasiewicz logic L3, which defines implication as in K3 except null IMPLIES null => true

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Cypher Constraint and Index Syntax Proposal

This proposoal follows three design principles:

1. Make it easy to understand the affected part of the graph in relationship to querying it (Rationale: Minimize mental effort for using constraints and indices)

2. Re-use existing concepts as much as possible (i.e. patterns and expressions) (Rationale: Minimize amount of new concepts that need to be learned)

3. Use the same imperative form as all existing update and schema commands (verb first, like in CREATE INDEX) and try to use similiar syntax structure for both constraint and index creation

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Game Of Life

Game of Life is mathematic toy world that was invented by John Horton Conway in 1970. Game of Life is played on a grid of cells that are either dead or alive by simluating how the world evolves over a series of rounds. In each round cells die, survive, or are reborn depending on the number of neighbours they have. You can find out more about Game of Life by watching the video below or reading up on it in Wikipedia.

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= Master of Pancakes: Find Missing Recipe Ingredients =

:neo4j-version: 2.0.0
:author: Stefan Plantikow
:twitter: @boggle

image::http://www.perfectpancake.info/wp-content/uploads/2013/04/pancakes.jpg[]

Let's say you have a database of recipes and ingredients, as well as chefs and their current kitchen inventory.

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-------------------------------------------------------------------------------
Test set: org.neo4j.kernel.impl.nioneo.store.IdGeneratorRebuildFailureEmulationTest
-------------------------------------------------------------------------------
Tests run: 20, Failures: 1, Errors: 9, Skipped: 0, Time elapsed: 92.186 sec <<< FAILURE! - in org.neo4j.kernel.impl.nioneo.store.IdGeneratorRebuildFailureEmulationTest
neostore_propertystore_db(org.neo4j.kernel.impl.nioneo.store.IdGeneratorRebuildFailureEmulationTest$FailureDuringRebuild)  Time elapsed: 91.414 sec  <<< FAILURE!
java.lang.AssertionError: makeStoreOk should have thrown UnderlyingStorageException
	at org.junit.Assert.fail(Assert.java:88)
	at org.neo4j.kernel.impl.nioneo.store.IdGeneratorRebuildFailureEmulationTest$FailureDuringRebuild.emulateFailureOnRebuildOf(IdGeneratorRebuildFailureEmulationTest.java:87)

neostore_propertystore_db_strings(org.neo4j.kernel.impl.nioneo.store.IdGeneratorRebuildFailureEmulationTest$FailureDuringRebuild)  Time elapsed: 0.005

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"/Users/stepn/Current/neo4j/manual/target/tools/bin/asciidoc/asciidoc.py"  --attribute neo4j-version=2.0-SNAPSHOT --attribute gitversion=master --attribute importdir="/Users/stepn/Current/neo4j/manual/target/docs" --conf-file="/Users/stepn/Current/neo4j/manual/target/conf/asciidoc.conf"  --conf-file="/Users/stepn/Current/neo4j/manual/target/conf/asciidoc.local.conf" --backend html5 --doctype book --attribute docinfo1 --attribute toc --out-file "/Users/stepn/Current/neo4j/manual/target/html5/index.html" "/Users/stepn/Current/neo4j/manual/target/src/neo4j-manual.asciidoc" 2>&1 | "/Users/stepn/Current/neo4j/manual/target/tools/build/outputcheck-includefiles.sh" || false
Traceback (most recent call last):
  File "/Users/stepn/.asciidoc/filters/queryresult/queryresult.py", line 120, in <module>
    if data[0][0] == '+':
IndexError: list index out of range
asciidoc: WARNING: union-union-two-queries.result.asciidoc: line 5: filter non-zero exit code: "/usr/bin/python" "/Users/stepn/.asciidoc/filters/queryresult/quer

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package org.neo4j.cypher.performance

import org.junit.Test

class ScalaStreamTest {

  @Test def stream_append_should_use_linear_memory() {

    def streamAppendTimes(times: Int): Float =
    {

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trait Rewriter[T] extends {
  def rewrite[X <: T](a: Rewritable[X]): Rewritable[X]
}

trait Rewritable[T] {
  self: T with Rewritable[T] =>

  def rewrite(r: Rewriter[T]): T = r.rewrite[T](self).reveal

  def reveal: T = self

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module Foo

	def self.files
		f = []
		f << 'foo/a'
		f << 'foo/b'
		f
	end

	def self.load_relative(f)