add project for SSSP with Bellman-Ford implementation

.travis.yml

@@ -3,25 +3,26 @@ osx_image: xcode7.3
 
 script:
 
+- xcodebuild test -project ./All-Pairs\ Shortest\ Paths/APSP/APSP.xcodeproj -scheme APSPTests
 - xcodebuild test -project ./Array2D/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./AVL\ Tree/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Binary\ Search/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Binary\ Search\ Tree/Solution\ 1/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Bloom\ Filter/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Breadth-First\ Search/Tests/Tests.xcodeproj -scheme Tests
+- xcodebuild test -project ./Bucket\ Sort/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Heap/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Heap\ Sort/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Insertion\ Sort/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./K-Means/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Linked\ List/Tests/Tests.xcodeproj -scheme Tests
+- xcodebuild test -project ./Longest\ Common\ Subsequence/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Priority\ Queue/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Queue/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Quicksort/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Run-Length\ Encoding/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Select\ Minimum\ Maximum/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Selection\ Sort/Tests/Tests.xcodeproj -scheme Tests
 - xcodebuild test -project ./Shell\ Sort/Tests/Tests.xcodeproj -scheme Tests
-- xcodebuild test -project ./Stack/Tests/Tests.xcodeproj -scheme Tests
-- xcodebuild test -project ./Longest\ Common\ Subsequence/Tests/Tests.xcodeproj -scheme Tests
-- xcodebuild test -project ./Bucket\ Sort/Tests/Tests.xcodeproj -scheme Tests
-- xcodebuild test -project ./All-Pairs\ Shortest\ Paths/APSP/APSP.xcodeproj -scheme APSPTests
+- xcodebuild test -project ./Single-Source\ Shortest\ Paths\ \(Weighted\)/SSSP.xcodeproj -scheme SSSPTests
+- xcodebuild test -project ./Stack/Tests/Tests.xcodeproj -scheme Tests

Single-Source Shortest Paths (Weighted)/SSSP.playground/Contents.swift

@@ -0,0 +1,28 @@
+import Graph
+import SSSP
+
+let graph = AdjacencyMatrixGraph<String>()
+let s = graph.createVertex("s")
+let t = graph.createVertex("t")
+let x = graph.createVertex("x")
+let y = graph.createVertex("y")
+let z = graph.createVertex("z")
+
+graph.addDirectedEdge(s, to: t, withWeight: 6)
+graph.addDirectedEdge(s, to: y, withWeight: 7)
+
+graph.addDirectedEdge(t, to: x, withWeight: 5)
+graph.addDirectedEdge(t, to: y, withWeight: 8)
+graph.addDirectedEdge(t, to: z, withWeight: -4)
+
+graph.addDirectedEdge(x, to: t, withWeight: -2)
+
+graph.addDirectedEdge(y, to: x, withWeight: -3)
+graph.addDirectedEdge(y, to: z, withWeight: 9)
+
+graph.addDirectedEdge(z, to: s, withWeight: 2)
+graph.addDirectedEdge(z, to: x, withWeight: 7)
+
+let result = BellmanFord<String>.apply(graph, source: s)!
+
+let path = result.path(z, inGraph: graph)

Single-Source Shortest Paths (Weighted)/SSSP.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='osx'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>