08-27-周三_17-09-29

node_modules/graphlibrary/lib/alg/is-acyclic.js

@@ -0,0 +1,15 @@
+var topsort = require('./topsort')
+
+module.exports = isAcyclic
+
+function isAcyclic (g) {
+  try {
+    topsort(g)
+  } catch (e) {
+    if (e instanceof topsort.CycleException) {
+      return false
+    }
+    throw e
+  }
+  return true
+}