added concat script

Author: fabianmoronzirfas

bin/concat.js

@@ -0,0 +1,27 @@
+const folders = ['./Array/', './Function/', './Object/', './String/'];
+// const testFolder = './Array/';
+const fs = require('fs');
+const path = require('path');
+const cat = require('cat');
+const bundlePath = path.resolve(process.cwd(), './index.js');
+
+// clear the file
+fs.writeFileSync(path.resolve(process.cwd(), bundlePath), '');
+// loop folders
+folders.forEach(folder => {
+  fs.readdir(folder, (err, files) => {
+    files.forEach(file => {
+      // console.log(file);
+      let filePath = path.resolve(process.cwd(), `${folder}${file}`);
+      // console.log(filePath);
+      cat(filePath, (error, data)=>{
+        if(error !== null) {
+          console.log(error);
+          process.exit();
+        }
+        fs.appendFileSync(bundlePath, `//${file}\n${data}\n`);
+      });
+    });
+  });
+
+});