08-27-周三_17-09-29

node_modules/graphlib/lib/alg/components.js

@@ -0,0 +1,27 @@
+var _ = require("../lodash");
+
+module.exports = components;
+
+function components(g) {
+  var visited = {};
+  var cmpts = [];
+  var 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;
+}