Update README.md

harmeetsingh11 · web-flow · commit bae70daee2c4 · 2023-10-17T16:13:14.000+05:30
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-<h2><a href="https://leetcode.com/problems/group-by/">2631. Group By</a></h2><h3>Medium</h3><hr><div><p>Write code that enhances all arrays such that you can call the&nbsp;<code>array.groupBy(fn)</code>&nbsp;method on any array and it will return a <strong>grouped</strong>&nbsp;version of the array.</p>
+<h2><a href="https://leetcode.com/problems/group-by/">2631. Group By</a></h2><img src="https://img.shields.io/badge/Medium-FECC00" alt="Medium" /><hr><div><p>Write code that enhances all arrays such that you can call the&nbsp;<code>array.groupBy(fn)</code>&nbsp;method on any array and it will return a <strong>grouped</strong>&nbsp;version of the array.</p>
 
 <p>A&nbsp;<strong>grouped</strong>&nbsp;array is an object where each&nbsp;key&nbsp;is&nbsp;the output of&nbsp;<code>fn(arr[i])</code>&nbsp;and each&nbsp;value is an array containing all items in the original array with that key.</p>
 

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`1`		`-<h2><a href="https://leetcode.com/problems/group-by/">2631. Group By</a></h2><h3>Medium</h3><hr><div><p>Write code that enhances all arrays such that you can call the <code>array.groupBy(fn)</code> method on any array and it will return a <strong>grouped</strong> version of the array.</p>`
	`1`	`+<h2><a href="https://leetcode.com/problems/group-by/">2631. Group By</a></h2><img src="https://img.shields.io/badge/Medium-FECC00" alt="Medium" /><hr><div><p>Write code that enhances all arrays such that you can call the <code>array.groupBy(fn)</code> method on any array and it will return a <strong>grouped</strong> version of the array.</p>`
`2`	`2`
`3`	`3`	`<p>A <strong>grouped</strong> array is an object where each key is the output of <code>fn(arr[i])</code> and each value is an array containing all items in the original array with that key.</p>`
`4`	`4`