.gitignore

@@ -1,3 +1,8 @@
 node_modules
 package-lock.json
 build
+
+*yarn*
+*.tsbuildinfo
+tsconfig.tsbuildinfo
+*test*

readme.md

@@ -4,7 +4,7 @@ MapDB A Map that stores data locally and loads it at startup. Written in JavaScr
 
 ### How does it work?
 
-Map.db works just like the JavaScript built-in **Map**, with the same methods and functionalities, and in fact it uses itself a Map, but while the built-in Map only stores data in internal memory, this module **stores data locally in a file and loads it back in the Map at startup**.
+Mit.db works just like the JavaScript built-in **Map**, with the same methods and functionalities, and in fact it uses itself a Map, but while the built-in Map only stores data in internal memory, this module **stores data locally in a file and loads it back in the Map at startup**.
 
 The purpose of this module is to make the JavaScript built-in Map an actual **database**, and there comes the name `mit.db`: a Map that can be used as a database.
 
@@ -58,5 +58,12 @@ await db.set('what', 'how')
 #### get()
 
 ```js
-var answ = db.get('what') // answ = how
+var ansa = db.get('what') // ansa = how
+```
+
+#### has()
+
+```js
+var ansb = db.has('what') // ansb = true
+var ansc = db.has('attila') // ansc = false
 ```

src/index.ts

@@ -8,10 +8,10 @@ writeDB = fsp.writeFile;
 export class MitDB {
     /**
      * @constructor
-     * @param filename If not set, MapDB will only use internal memory
+     * @param filename If not set, MitDB will only use internal memory
      * @example 'file.db'
      * @param options Options to pass to the constructor
-     * @param options.dirname
+     * @param options.dirname Where to save the file?
      * @example 'data'
      */
     constructor(fn: string | undefined, options: any) {
@@ -58,15 +58,20 @@ export class MitDB {
     /**
      * @param key 
      */
-
     get(key: string | number) {
-        if (map) {
-            return map.get(key)
-        } else {
-            file = fs.readFileSync(db);
-            data = JSON.parse(file.toString());
+        file = fs.readFileSync(db);
+        data = JSON.parse(file.toString());
 
-            return data.find((pair: any) => pair.key == key)?.value || undefined;
-        }
+        return data.find((pair: any) => pair.key == key)?.value || undefined;
+    }
+
+    /**
+     * @param key 
+     */
+    has(key: string | number) {
+        const file = fs.readFileSync(db);
+        const data = JSON.parse(file.toString());
+
+        return data.find((pair: any) => pair.key == key) ? true : false;
     }
 }