Created
August 1, 2024 18:29
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| class BidirectionalMap<T> { | |
| private forwardMap: Map<T, T>; | |
| private backwardMap: Map<T, T>; | |
| constructor() { | |
| this.forwardMap = new Map(); | |
| this.backwardMap = new Map(); | |
| } | |
| set(key: T, value: T): void { | |
| const oldValue = this.forwardMap.get(key); | |
| if (oldValue) { | |
| this.backwardMap.delete(oldValue); | |
| } | |
| const oldKey = this.backwardMap.get(value); | |
| if (oldKey) { | |
| this.forwardMap.delete(oldKey); | |
| } | |
| this.forwardMap.set(key, value); | |
| this.backwardMap.set(value, key); | |
| } | |
| getKey(value: T): T | undefined { | |
| return this.backwardMap.get(value); | |
| } | |
| getValue(key: T): T | undefined { | |
| return this.forwardMap.get(key); | |
| } | |
| hasKey(key: T): boolean { | |
| return this.forwardMap.has(key); | |
| } | |
| hasValue(value: T): boolean { | |
| return this.backwardMap.has(value); | |
| } | |
| deleteKey(key: T): void { | |
| if (this.forwardMap.has(key)) { | |
| const value = this.forwardMap.get(key); | |
| this.forwardMap.delete(key); | |
| if (value !== undefined) { | |
| this.backwardMap.delete(value); | |
| } | |
| } | |
| } | |
| deleteValue(value: T): void { | |
| if (this.backwardMap.has(value)) { | |
| const key = this.backwardMap.get(value); | |
| this.backwardMap.delete(value); | |
| if (key !== undefined) { | |
| this.forwardMap.delete(key); | |
| } | |
| } | |
| } | |
| clear(): void { | |
| this.forwardMap.clear(); | |
| this.backwardMap.clear(); | |
| } | |
| } |
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