From 61120916ded880446fa3bf9f59ae706bc0d5825e Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Jan 2018 17:33:46 +0200
Subject: [PATCH] Add invertKeyValues

Inverts the key-value pairs of an object
---
 snippets/invertKeyValues.md | 13 +++++++++++++
 tag_database                |  1 +
 2 files changed, 14 insertions(+)
 create mode 100644 snippets/invertKeyValues.md

diff --git a/snippets/invertKeyValues.md b/snippets/invertKeyValues.md
new file mode 100644
index 000000000..b3a7ce11d
--- /dev/null
+++ b/snippets/invertKeyValues.md
@@ -0,0 +1,13 @@
+### invertKeyValues
+
+Inverts the key-value pairs of an object, without mutating it.
+
+Use `Object.keys()` and `Array.reduce()` to invert the key-value pairs of an object.
+
+```js
+const invertKeyValues = obj => Object.keys(obj).reduce((acc,key) => { acc[obj[key]] = key; return acc;},{});
+```
+
+```js
+invertKeyValues({name:'John', age: 20}) // { 20: 'age', John: 'name' }
+```
diff --git a/tag_database b/tag_database
index 185d2ee1f..64503984d 100644
--- a/tag_database
+++ b/tag_database
@@ -65,6 +65,7 @@ initializeArrayWithRange:array
 initializeArrayWithValues:array
 inRange:math
 intersection:array
+invertKeyValues:object
 isAbsoluteURL:string
 isArmstrongNumber:math
 isArray:utility