From 241cb26a6f016afd8b038e68b872af72ba1c9e4a Mon Sep 17 00:00:00 2001 From: Revone Date: Wed, 6 Dec 2023 09:18:23 +0800 Subject: [PATCH] fix: bug fix for #52 --- package-lock.json | 376 +++++++++--------- src/data-structures/graph/abstract-graph.ts | 5 + src/data-structures/graph/directed-graph.ts | 38 +- .../graph/directed-graph.test.ts | 16 + 4 files changed, 236 insertions(+), 199 deletions(-) diff --git a/package-lock.json b/package-lock.json index c3d47f3..cb35fa9 100644 --- a/package-lock.json +++ b/package-lock.json @@ -1,12 +1,12 @@ { "name": "data-structure-typed", - "version": "1.48.2", + "version": "1.48.3", "lockfileVersion": 3, "requires": true, "packages": { "": { "name": "data-structure-typed", - "version": "1.48.2", + "version": "1.48.3", "license": "MIT", "devDependencies": { "@swc/core": "^1.3.96", @@ -65,9 +65,9 @@ } }, "node_modules/@babel/code-frame": { - "version": "7.23.4", - "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.23.4.tgz", - "integrity": "sha512-r1IONyb6Ia+jYR2vvIDhdWdlTGhqbBoFqLTQidzZ4kepUFH15ejXvFHxCVbtl7BOXIudsIubf4E81xeA3h3IXA==", + "version": "7.23.5", + "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.23.5.tgz", + "integrity": "sha512-CgH3s1a96LipHCmSUmYFPwY7MNx8C3avkq7i4Wl3cfa662ldtUe4VM1TPXX70pfmrlWTb6jLqTYrZyT2ZTJBgA==", "dev": true, "dependencies": { "@babel/highlight": "^7.23.4", @@ -134,30 +134,30 @@ } }, "node_modules/@babel/compat-data": { - 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Constant time for Map operations. * Space Complexity: O(1) - Constant space, as it creates only a few variables. diff --git a/src/data-structures/graph/directed-graph.ts b/src/data-structures/graph/directed-graph.ts index 3fd7839..d8fc433 100644 --- a/src/data-structures/graph/directed-graph.ts +++ b/src/data-structures/graph/directed-graph.ts @@ -178,32 +178,48 @@ export class DirectedGraph< } /** - * Time Complexity: O(|E|) where |E| is the number of edges + * Time Complexity: O(E) where E is the number of edges * Space Complexity: O(1) */ + /** - * Time Complexity: O(|E|) where |E| is the number of edges + * Time Complexity: O(E) where E is the number of edges * Space Complexity: O(1) * - * The function removes an edge from a graph and returns the removed edge, or undefined if the edge was not found. - * @param {EO} edge - The `edge` parameter is an object that represents an edge in a graph. It has two properties: `src` - * and `dest`, which represent the source and destination vertices of the edge, respectively. - * @returns The method `deleteEdge` returns the removed edge (`EO`) if it exists, or `undefined` if the edge does not exist. + * The `deleteEdge` function removes an edge from a graph and returns the removed edge. + * @param {EO | VertexKey} edgeOrSrcVertexKey - The `edge` parameter can be either an `EO` object (edge object) or + * a `VertexKey` (key of a vertex). + * @param {VertexKey} [destVertexKey] - The `destVertexKey` parameter is an optional parameter that + * represents the key of the destination vertex of the edge. It is used to specify the destination + * vertex when the `edge` parameter is a vertex key. If `destVertexKey` is not provided, the function + * assumes that the `edge` + * @returns the removed edge (EO) or undefined if no edge was removed. */ - deleteEdge(edge: EO): EO | undefined { + deleteEdge(edgeOrSrcVertexKey: EO | VertexKey, destVertexKey?: VertexKey): EO | undefined { let removed: EO | undefined = undefined; - const src = this._getVertex(edge.src); - const dest = this._getVertex(edge.dest); + let src: VO | undefined, dest: VO | undefined; + if (this.isVertexKey(edgeOrSrcVertexKey)) { + if (this.isVertexKey(destVertexKey)) { + src = this._getVertex(edgeOrSrcVertexKey); + dest = this._getVertex(destVertexKey); + } else { + return; + } + } else { + src = this._getVertex(edgeOrSrcVertexKey.src); + dest = this._getVertex(edgeOrSrcVertexKey.dest); + } + if (src && dest) { const srcOutEdges = this._outEdgeMap.get(src); if (srcOutEdges && srcOutEdges.length > 0) { - arrayRemove(srcOutEdges, (edge: EO) => edge.src === src.key); + arrayRemove(srcOutEdges, (edge: EO) => edge.src === src!.key && edge.dest === dest?.key); } const destInEdges = this._inEdgeMap.get(dest); if (destInEdges && destInEdges.length > 0) { - removed = arrayRemove(destInEdges, (edge: EO) => edge.dest === dest.key)[0]; + removed = arrayRemove(destInEdges, (edge: EO) => edge.src === src!.key && edge.dest === dest!.key)[0]; } } diff --git a/test/unit/data-structures/graph/directed-graph.test.ts b/test/unit/data-structures/graph/directed-graph.test.ts index 384f5ca..ab4a16c 100644 --- a/test/unit/data-structures/graph/directed-graph.test.ts +++ b/test/unit/data-structures/graph/directed-graph.test.ts @@ -634,5 +634,21 @@ describe('DirectedGraph iterative Methods', () => { const concatenated = graph.reduce((acc, value, key) => acc + key, ''); expect(concatenated).toBe(vertices.join('')); }); + + test('Removing an edge of a DirectedGraph should not delete additional edges', () => { + const dg = new DirectedGraph(); + dg.addVertex('hello') + dg.addVertex('hi') + dg.addVertex('hey') + dg.addEdge('hello', 'hi') + dg.addEdge('hello', 'hey') + expect(dg.getEdge('hello', 'hi')?.src).toBe('hello') + expect(dg.getEdge('hello', 'hi')?.dest).toBe('hi') + expect(dg.getEdge('hello', 'hey')?.src).toBe('hello') + expect(dg.getEdge('hello', 'hey')?.dest).toBe('hey') + dg.deleteEdge('hello', 'hi') + expect(dg.getEdge('hello', 'hi')).toBe(undefined) + expect(dg.getEdge('hello', 'hey')).toBeInstanceOf(DirectedEdge) + }); });