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fix(hash_map): keep entries when trigger resize #130

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Merged
merged 1 commit into from
Jun 16, 2023
Merged

fix(hash_map): keep entries when trigger resize #130

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4 changes: 3 additions & 1 deletion data_structures/map/hash_map.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -209,10 +209,12 @@ export class HashMap<K, V> implements Map<K, V> {
* Resizes the hash map by doubling the amount of buckets.
*/
private resize(): void {
const entries = this.entries();

this.initializeBuckets(this.buckets.length * 2);
this.size = 0;

for (const entry of this.entries()) {
for (const entry of entries) {
this.set(entry.key, entry.value);
}
}
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18 changes: 18 additions & 0 deletions data_structures/map/test/hash_map.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -88,4 +88,22 @@ describe("Hash Map", () => {
{ key: "c", value: 3 },
]);
});

it("should keep entries when trigger resize", () => {
hashMap.set('a', 1);
hashMap.set('b', 2);
hashMap.set('c', 3);
hashMap.set('d', 4);
hashMap.set('e', 5);
hashMap.set('f', 6);
hashMap.set('g', 7);
hashMap.set('h', 8);
hashMap.set('i', 9);
hashMap.set('j', 10);
hashMap.set('k', 11);
hashMap.set('l', 12);
hashMap.set('m', 13);
hashMap.set('n', 14);
expect(hashMap.getSize()).toBe(14);
})
});