Add implementation for .eachIndex() method

uncaughtxcptn · Jun 1, 2019 · bbd2e99 · bbd2e99
1 parent d98b1b1
commit bbd2e99
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/methods/eachIndex/index.js b/methods/eachIndex/index.js
@@ -0,0 +1,9 @@
+export default function eachIndex(array, callback) {
+    if (typeof callback !== 'function') {
+        throw new TypeError('Parameter "callback" must be a function.');
+    }
+
+    array.forEach((item, i) => callback(i));
+
+    return array;
+}