08-27-周三_17-09-29

node_modules/graphlibrary/lib/alg/components.js

@@ -0,0 +1,27 @@
+var _ = require('../lodash')
+
+module.exports = components
+
+function components (g) {
+  const visited = {}
+  const cmpts = []
+  let cmpt
+
+  function dfs (v) {
+    if (_.has(visited, v)) return
+    visited[v] = true
+    cmpt.push(v)
+    _.each(g.successors(v), dfs)
+    _.each(g.predecessors(v), dfs)
+  }
+
+  _.each(g.nodes(), function (v) {
+    cmpt = []
+    dfs(v)
+    if (cmpt.length) {
+      cmpts.push(cmpt)
+    }
+  })
+
+  return cmpts
+}