Add connected component lab

labs/ConnectedComponents/Manifest.toml

+# This file is machine-generated - editing it directly is not advised
+
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+[[deps.ArnoldiMethod]]
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+    [deps.Compat.extensions]
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+    [deps.StaticArrays.extensions]
+    StaticArraysChainRulesCoreExt = "ChainRulesCore"
+    StaticArraysStatisticsExt = "Statistics"
+
+    [deps.StaticArrays.weakdeps]
+    ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
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labs/ConnectedComponents/Project.toml

+[deps]
+Colors = "5ae59095-9a9b-59fe-a467-6f913c188581"
+GraphPlot = "a2cc645c-3eea-5389-862e-a155d0052231"
+Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"

labs/ConnectedComponents/main.jl

+using Graphs, GraphPlot, SparseArrays, Colors
+
+function myplot(graph, components)
+    cols = Colors.distinguishable_colors(length(components))
+    node_cols = Vector{eltype(cols)}(undef, nv(graph))
+    for (comp, col) in zip(components, cols)
+        node_cols[comp] .= col
+    end
+    gplot(graph, nodefillc = node_cols)
+end
+
+n = 40
+adjacency = sprand(Bool, n, n, 0.02)
+
+graph = Graph(max.(adjacency, adjacency'))
+
+connected_components(graph)
+
+myplot(graph, connected_components(graph))
+
+function my_connected_component(graph)
+    # TODO
+end