Object form of _.forEach

README.md

@@ -13,23 +13,23 @@ Please read [how to contribute](./src/content/how-to-contribute.md) if you want
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src/content/lodash/collection/forEach/lodash.js

@@ -9,3 +9,10 @@ forEach(array, (item, index) => {
 // => a 0
 // => b 1
 // => c 2
+
+const obj = { a: 'red', b: 'green' }
+forEach(obj, (item, key) => {
+  console.log(item, key)
+})
+// => red a
+// => green b

src/content/lodash/collection/forEach/notes.md

@@ -1,3 +1,3 @@
 Iterates over elements of <code>collection</code> and invokes <code>iteratee</code> for each element. The iteratee is invoked with three arguments: <em>(value, index|key, collection)</em>. Iteratee functions may exit iteration early by explicitly returning <code>false</code>.
 
-Resources: [Array#forEach](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach) [Source](https://www.reindex.io/blog/you-might-not-need-underscore/#iterate)
+Resources: [Array#forEach](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach) [Object#entries](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries) [Source](https://www.reindex.io/blog/you-might-not-need-underscore/#iterate)

src/content/lodash/collection/forEach/spec.js

@@ -14,6 +14,8 @@ describe('forEach', () => {
       expect(console.log).toHaveBeenNthCalledWith(1, 'a', 0)
       expect(console.log).toHaveBeenNthCalledWith(2, 'b', 1)
       expect(console.log).toHaveBeenNthCalledWith(3, 'c', 2)
+      expect(console.log).toHaveBeenNthCalledWith(4, 'red', 'a')
+      expect(console.log).toHaveBeenNthCalledWith(5, 'green', 'b')
     })
   })
 
@@ -32,6 +34,8 @@ describe('forEach', () => {
       expect(console.log).toHaveBeenNthCalledWith(1, 'a', 0)
       expect(console.log).toHaveBeenNthCalledWith(2, 'b', 1)
       expect(console.log).toHaveBeenNthCalledWith(3, 'c', 2)
+      expect(console.log).toHaveBeenNthCalledWith(4, 'red', 'a')
+      expect(console.log).toHaveBeenNthCalledWith(5, 'green', 'b')
     })
   })
 })

src/content/lodash/collection/forEach/vanilla.js

@@ -1,6 +1,12 @@
-;['a', 'b', 'c'].forEach((item, index) => {
+['a', 'b', 'c'].forEach((item, index) => {
   console.log(item, index)
 })
 // => a 0
 // => b 1
 // => c 2
+
+Object.entries({ a: 'red', b: 'green' }).forEach(([key, item]) => {
+  console.log(item, key)
+})
+// => red a
+// => green b