ImmutableGraph

Examples

Directed graph:

let u = "☝️", v = "✌️"
let vertices = Set(arrayLiteral: u, v)

let e = Edge(source: u, destination: v)
let edges = Set(arrayLiteral: e)

let graph = Graph(vertices: vertices, edges: edges)

Weighted directed graph:

let w_e = WeightedEdge(source: u, destination: v, weight: 3.9)
let weightedEdges = Set(arrayLiteral: w_e)

let weightedGraph = Graph(vertices: vertices, edges: weightedEdges)

DFS from source:

let simpleGraphAnnotation = dfs(graph, source: v)

DFS on graph:

let simpleGraphAnnotation = dfs(graph)

BFS from source:

let simpleGraphAnnotation = bfs(graph, source: v)

Finding paths from graph annotations:

let parentByVertex = simpleGraphAnnotation.parentByVertex
let result = findPath(parentByVertex: parentByVertex, source: s, destination: d)

CocoaPods installation

ImmutableGraph is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "ImmutableGraph"

Swift Package installation

If your package depends on ImmutableGraph, add the following dependency to your Package.swift:

dependencies: [
    .package(url: "https://github.com/horothesun/ImmutableGraph", .upToNextMinor(from: "0.1.0"))
]

Generate Xcode project

swift package generate-xcodeproj

Testing

macOS

swift test

Docker Linux

IMPORTANT: regenerate Linux test list executing

swift test --generate-linuxmain

Execute on base swift:5.2 image

docker run --rm \
    --volume "$(pwd):/package" \
    --workdir '/package' \
    swift:5.2 \
    /bin/bash -c 'swift test'

or create a new image based on Dockerfile and run it

docker build --tag immutable-graph .
docker run --rm immutable-graph

Notes

This library was built using TDD.

Some of the graphs used to unit test BFS and DFS algorithms come from Algorithms with Attitude YouTube channel's related videos:

• Graphs: Breadth First Search (BFS) with Example
• Graphs: Depth First Search (DFS) with Example

Author

Nicola Di Pol, horothesun@gmail.com

License

ImmutableGraph is available under the MIT license. See the LICENSE file for more info.