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Patch 5 #127

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Merged
merged 3 commits into from
Aug 6, 2018
Merged

Patch 5 #127

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cb15d55
New function 'fromArray'
seIncorp Jul 31, 2018
27f3080
New Test for new function 'fromArray'
Jul 31, 2018
f6db1ba
Minor changes
seIncorp Jul 31, 2018
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9 changes: 9 additions & 0 deletions src/data-structures/doubly-linked-list/DoublyLinkedList.js
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Original file line number Diff line number Diff line change
Expand Up @@ -213,6 +213,15 @@ export default class DoublyLinkedList {
return nodes;
}

/**
* @param {DoublyLinkedListNode[]} array - Array of nodes
* @return {DoublyLinkedListNode[]}
*/
fromArray(arr = []) {
arr.forEach(node => this.append(node.value));
return this;
}

/**
* @param {function} [callback]
* @return {string}
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17 changes: 17 additions & 0 deletions src/data-structures/doubly-linked-list/__test__/DoublyLinkedList.test.js
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Expand Up @@ -36,6 +36,23 @@ describe('DoublyLinkedList', () => {
expect(linkedList.toString()).toBe('3,2,1');
});

it('should append new nodes from array', () => {
const linkedList1 = new DoublyLinkedList();
linkedList1.append(1);
linkedList1.append(1);
linkedList1.append(2);
linkedList1.append(3);
linkedList1.append(3);
linkedList1.append(3);
linkedList1.append(4);
linkedList1.append(5);
const array = linkedList1.toArray();

const linkedList2 = new DoublyLinkedList();
linkedList2.fromArray(array);
expect(linkedList2.toString()).toBe('1,1,2,3,3,3,4,5');
});

it('should delete node by value from linked list', () => {
const linkedList = new DoublyLinkedList();

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