fix: rename dir to folderName (nodejs#161)

liangpeili · Onur Laru · commit 4dfd6522fa7c · 2019-03-03T01:13:00.000+01:00
diff --git a/src/documentation/0045-node-folders/index.md b/src/documentation/0045-node-folders/index.md
@@ -20,8 +20,8 @@ const fs = require('fs')
 const folderName = '/Users/joe/test'
 
 try {
-  if (!fs.existsSync(dir)) {
-    fs.mkdirSync(dir)
+  if (!fs.existsSync(folderName)) {
+    fs.mkdirSync(folderName)
   }
 } catch (err) {
   console.error(err)
