Add script to count json objects

.bin/count-json-objects.js

@@ -0,0 +1,7 @@
+#!/usr/bin/env node
+
+const fs = require('fs')
+
+const objLength = obj => Object.keys(obj).length
+
+fs.readFile(process.argv[2], (err, data) => (err ? console.error(err) : console.log(objLength(JSON.parse(data)))))