Update README.md

README.md

@@ -8,6 +8,13 @@ A collection of 38,176 emoji images from Facebook, Google, Apple, WhatsApp, Sams
   * More generally: `String.fromCodePoint(...filename.split("_")[1].split("-").map(n => parseInt(n, 16)))`
 * The tar files directly contain the image files (they're not inside a parent folder).
 
+Here's some JavaScript code to convert the file name of an emoji image into the actual Unicode emoji character:
+```js
+let filename = ...;
+let fixedFilename = filename.replace(/(no|light|medium|medium-light|medium-dark|dark)-skin-tone/, "").replace(/__/, "_").replace(/--/, "-");
+let emoji = String.fromCodePoint(...fixedFilename.split("_")[1].split(".")[0].split("-").map(hex => parseInt(hex, 16)));
+```
+
 ## Facebook examples:
 ![Facebook emoji grid](https://i.imgur.com/z0ZCHfO.jpg)