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Jun 1, 2023
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Update documentation #1

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25 changes: 14 additions & 11 deletions graph_algorithm.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,17 +4,20 @@
var BLACK = 2

var GraphAlgorithm = {
//
// Detect loop in a directed graph, use graph coloring algorithm.
//
// @param vertices - array of vertices, a vertex is either an integer or a
// string
// @param edges - array of edges, an edge is an array of length 2 which
// marks the source and destination vertice.
// i.e., [source, dest]
//
// @return { hasLoop: true, loop: [...] }
//
/**
* Detects loops in a directed graph using a graph coloring algorithm.
*
* @param {Array} vertices - An array of vertices. Each vertex can be either
* an integer or a string.
* @param {Array} edges - An array of edges. Each edge is represented as an array of length 2,
* specifying the source and destination vertices. Format: [source, destination].
*
* @returns {Object} An object indicating whether a loop is present and, if so, the vertices
* forming the loop. The return value has the following structure:
* - hasLoop: A boolean value indicating whether a loop is present in the graph.
* - loop: An array of vertices forming the loop, listed in the order they are encountered
* during traversal.
*/
hasLoop: function(vertices, edges) {
var colors = {}
var path = []
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