first code snippet addded

Author: krishna9802

README.md

@@ -13,6 +13,8 @@ One liner clean code snippets in javascript/react with ES6 syntax
 | 1   | [Add a key-value pair in object conditionally](#add-a-key-value-pair-in-object-conditionally)                                         |
 
 
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 1. ### Add a key-value pair in object conditionally