David Winslow dwins
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| command Prose set background=light wrap linebreak |
dwins
/ powerset.scala
Created
September 27, 2012 18:25
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| def powerSet[A](xs: List[A]): List[List[A]] = | |
| xs.foldLeft(List(Nil: List[A]))((accum, elem) => accum.flatMap(l => Seq(l, elem :: l))) |
dwins
/ countChange.scala
Created
September 27, 2012 19:21
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| def countChange(money: Int, coins: List[Int]): Int = | |
| if (money < 0 || coins.isEmpty) | |
| 0 | |
| else if (money == 0) | |
| 1 | |
| else | |
| countChange(money - coins.head, coins) + countChange(money, coins.tail) |
dwins
/ gist:4207894
Created
December 4, 2012 19:41
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| def fetch[R : Fetchable](s: SQLCursor): R = implicitly[Fetchable[R]].fetch(s) | |
| trait Fetchable[R] { | |
| def fetch(s: SQLCursor): R | |
| } | |
| implicit object IntIsFetchable extends Fetchable[Int] { | |
| def fetch(s: SQLCursor): Int = s.getInt | |
| } |
dwins
/ gist:4514434
Created
January 11, 2013 22:15
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| scala> val params = (1, "Dan", "H") | |
| params: (Int, String, String) = (1,Dan,H) | |
| scala> case class Person(id: Int, name: String, initial: String) | |
| defined class Person | |
| scala> Person.tupled(params) | |
| res0: Person = Person(1,Dan,H) |
dwins
/ architecture.dot
Created
January 23, 2013 14:29
Quick Graphviz diagram for GeoServer's codebase
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| digraph { | |
| node [shape=box,fontname=Sans] | |
| edge [fontname=Sans,fontsize=6] | |
| Catalog | |
| subgraph { | |
| OWSDispatcher | |
| WebMapService | |
| WebFeatureService | |
| WebCoverageService | |
| WebProcessingService |
dwins
/ gist:5048116
Created
February 27, 2013 14:04
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| abstract class Printer { | |
| public static String message; | |
| } | |
| class FormalPrinter extends Printer { | |
| static { | |
| message = "Why hello good sir!"; | |
| } | |
| } |
dwins
/ recent-changes.sh
Created
March 15, 2013 13:42
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| #!/bin/sh | |
| set -e # Bail out as soon as any command fails | |
| git for-each-ref --format='%(objectname) %(refname)' refs/remotes | | |
| # sort | uniq -w20 | # uncomment for deduplication, but this doesn't account for multiple branches pointing to the same commit | |
| while read line; | |
| do | |
| ref=${line%\ *} | |
| count=$(git log --oneline --since="-1week" $ref | wc -l) |
dwins
/ gist:5206731
Created
March 20, 2013 17:39
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| org.neo4j.graphdb.TransactionFailureException: Index creation failed for identifiers, {provider=lucene, type=exact} | |
| at org.neo4j.kernel.IndexManagerImpl.getOrCreateIndexConfig(IndexManagerImpl.java:233) | |
| at org.neo4j.kernel.IndexManagerImpl.getOrCreateNodeIndex(IndexManagerImpl.java:312) | |
| at org.neo4j.kernel.IndexManagerImpl.forNodes(IndexManagerImpl.java:300) | |
| at org.neo4j.kernel.IndexManagerImpl.forNodes(IndexManagerImpl.java:294) | |
| at org.geogit.storage.Neo4JGraphDatabase.getOrAddNode(Neo4JGraphDatabase.java:209) | |
| at org.geogit.storage.Neo4JGraphDatabase.put(Neo4JGraphDatabase.java:169) | |
| at org.geogit.storage.ObjectDatabasePutInterceptor.putRevObjectInterceptor(ObjectDatabasePutInterceptor.java:112) | |
| at org.geogit.storage.ObjectDatabasePutInterceptor.invoke(ObjectDatabasePutInterceptor.java:47) | |
| at org.geogit.api.porcelain.CommitOp.call(CommitOp.java:300) |
dwins
/ gist:5213967
Created
March 21, 2013 15:34
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| [dwins@localhost dst]$ geogit remote list -v | |
| osm http://localhost:8080/geogit/repo (fetch) | |
| osm http://localhost:8080/geogit/repo (push) | |
| [dwins@localhost dst]$ geogit fetch osm master | |
| java.lang.IllegalStateException: Remote could not be resolved. | |
| at com.google.common.base.Preconditions.checkState(Preconditions.java:149) | |
| at org.geogit.api.porcelain.FetchOp.addRemote(FetchOp.java:94) | |
| at org.geogit.api.porcelain.FetchOp.addRemote(FetchOp.java:84) | |
| at org.geogit.cli.porcelain.Fetch.runInternal(Fetch.java:70) |