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Commit a1060c2

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2 parents 6c892c4 + 38688f2 commit a1060c2

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2 files changed

+23
-1
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2 files changed

+23
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‎src/data-structures/heap/MinHeap.js

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -141,8 +141,8 @@ export default class MinHeap {
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*/
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remove(item, customFindingComparator) {
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// Find number of items to remove.
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const numberOfItemsToRemove = this.find(item).length;
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const customComparator = customFindingComparator || this.compare;
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const numberOfItemsToRemove = this.find(item, customComparator).length;
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for (let iteration = 0; iteration < numberOfItemsToRemove; iteration += 1) {
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// We need to find item index to remove each time after removal since

‎src/data-structures/heap/__test__/MinHeap.test.js

Lines changed: 22 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,5 @@
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import MinHeap from '../MinHeap';
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import Comparator from '../../../utils/comparator/Comparator';
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describe('MinHeap', () => {
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it('should create an empty min heap', () => {
@@ -147,4 +148,25 @@ describe('MinHeap', () => {
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expect(minHeap.remove(3).toString()).toEqual('4');
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expect(minHeap.remove(4).toString()).toEqual('');
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});
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it('should be possible to remove items from heap with custom finding comparator', () => {
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const minHeap = new MinHeap();
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minHeap.add('dddd');
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minHeap.add('ccc');
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minHeap.add('bb');
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minHeap.add('a');
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expect(minHeap.toString()).toBe('a,bb,ccc,dddd');
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const comparator = new Comparator((a, b) => {
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if (a.length === b.length) {
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return 0;
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}
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return a.length < b.length ? -1 : 1;
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});
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minHeap.remove('hey', comparator);
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expect(minHeap.toString()).toBe('a,bb,dddd');
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});
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});

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