update readme

README.md

@@ -32,6 +32,9 @@ const newUser = await usersCol.insert({
 	posts: [],
 });
 
+// Find users with pagination (e.g., page 2, 10 users per page)
+const secondPageUsers = await usersCol.find().skip(10).limit(10);
+
 // Show all users
 const allUsers = usersCol.find({});
 
@@ -101,6 +104,10 @@ Check out [wrangler.toml from examples](https://github.com/good-lly/lowstorage/b
   - **Behavior**: Searches for documents that match the query.
   - **Returns**: A promise that resolves to an array of matching documents.
 
+- **_skip(numToSkip)_** Skips the specified number of documents in query results. Use this for pagination (e.g., skipping the first page of results). Returns the updated collection instance to allow chaining.
+
+- **_limit(numToLimit)_** Limits the number of documents returned by query results. Use this for pagination (e.g., limiting to 10 results per page). Returns the updated collection instance to allow chaining.
+
 - **findOne(query)**
 
   - **Input**: A query object.

src/lowstorage.js

@@ -16,22 +16,22 @@ const _generateUUID = () => {
 };
 
 const _isR2Store = (obj) => {
+	let hasMethod = (obj, name) => {
+		return typeof obj !== 'undefined' && obj !== null && typeof obj[name] === 'function';
+	};
+
 	return (
 		typeof obj === 'object' &&
 		obj !== null &&
-		'get' in obj &&
-		typeof obj.get === 'function' &&
-		'put' in obj &&
-		typeof obj.put === 'function' &&
-		'delete' in obj &&
-		typeof obj.delete === 'function' &&
-		'list' in obj &&
-		typeof obj.list === 'function'
+		hasMethod(obj, 'get') &&
+		hasMethod(obj, 'put') &&
+		hasMethod(obj, 'delete') &&
+		hasMethod(obj, 'list')
 	);
 };
 
 const _getStore = (env, storeName) => {
-	let store = storeName ? env[storeName] ?? null : null;
+	let store = storeName ? env[storeName] : null;
 	if (!store) {
 		// Check for null directly
 		for (const obj of Object.values(env)) {
@@ -134,12 +134,12 @@ class Collection {
 		const data = await this._loadData();
 		let updatedCount = 0;
 
-		data.forEach((doc) => {
-			if (_matchesQuery(doc, query)) {
-				Object.assign(doc, update);
+		for (let i = 0; i < data.length; i++) {
+			if (_matchesQuery(data[i], query)) {
+				Object.assign(data[i], update);
 				updatedCount++;
 			}
-		});
+		}
 
 		if (updatedCount > 0) {
 			await this._saveData(data);