Add createDirIfNotExists snippet

snippets/createDirIfNotExists.md

@@ -0,0 +1,14 @@
+### createDirIfNotExists
+
+Creates a directory, if it does not exist.
+
+Use `fs.existsSync()` to check if the directory exists, `fs.mkdirSync()` to create it.
+
+```js
+const fs = require('fs');
+const createDirIfNotExists = dir => !fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined;
+```
+
+```js
+createDirIfNotExists('test'); // creates the directory 'test', if it doesn't exist
+```

tag_database

@@ -38,6 +38,7 @@ copyToClipboard:browser,string,advanced
 countBy:array,object,intermediate
 counter:browser,advanced
 countOccurrences:array,intermediate
+createDirIfNotExists:node,beginner
 createElement:browser,utility,beginner
 createEventHub:browser,event,advanced
 CSVToArray:string,array,utility,intermediate

test/createDirIfNotExists.js

@@ -0,0 +1,6 @@
+const expect = require('expect');
+const {createDirIfNotExists} = require('./_30s.js');
+
+test('createDirIfNotExists is a Function', () => {
+  expect(createDirIfNotExists).toBeInstanceOf(Function);
+});