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Refactor LRU Cache.

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Lines changed: 21 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,24 @@`
`1`		`-/* eslint-disable no-param-reassign */`
`2`		`-import LinkedListNode from './LinkedListNode';`
	`1`	`+/* eslint-disable no-param-reassign, max-classes-per-file */`
	`2`	`+`
	`3`	`+/**`
	`4`	`+ * Simple implementation of the Doubly-Linked List Node`
	`5`	`+ * that is used in LRUCache class below.`
	`6`	`+ */`
	`7`	`+class LinkedListNode {`
	`8`	`+ /**`
	`9`	`+ * Creates a doubly-linked list node.`
	`10`	`+ * @param {string} key`
	`11`	`+ * @param {any} val`
	`12`	`+ * @param {LinkedListNode} prev`
	`13`	`+ * @param {LinkedListNode} next`
	`14`	`+ */`
	`15`	`+ constructor(key, val, prev = null, next = null) {`
	`16`	`+ this.key = key;`
	`17`	`+ this.val = val;`
	`18`	`+ this.prev = prev;`
	`19`	`+ this.next = next;`
	`20`	`+ }`
	`21`	`+}`
`3`	`22`
`4`	`23`	`/**`
`5`	`24`	`* Implementation of the LRU (Least Recently Used) Cache`

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