42 lines
1.1 KiB
TypeScript
42 lines
1.1 KiB
TypeScript
export class MultiMap<V, K extends unknown[]> extends Map<K[0], any> {
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multiGet(...keys: K): V | undefined {
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const firstKey = keys[0];
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const otherKeys = keys.slice(1);
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if (!this.has(firstKey)) {
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return undefined;
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}
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if (otherKeys.length > 0) {
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return (this.get(firstKey)! as MultiMap<any, any>).multiGet(...otherKeys);
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}
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return this.get(firstKey) as V;
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}
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multiHas(...keys: K): boolean {
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const firstKey = keys[0];
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const otherKeys = keys.slice(1);
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if (!this.has(firstKey)) {
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return false;
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}
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if (otherKeys.length > 0) {
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return (this.get(firstKey)! as MultiMap<any, any>).multiHas(...otherKeys);
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}
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return this.has(firstKey);
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}
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multiSet(value: V, ...keys: K) {
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const firstKey = keys[0];
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const otherKeys = keys.slice(1);
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if (otherKeys.length > 0) {
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if (!this.has(firstKey)) {
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this.set(firstKey, new MultiMap());
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}
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(this.get(firstKey) as MultiMap<any, any>)!.multiSet(value, ...otherKeys);
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} else {
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this.set(firstKey, value);
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}
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return value;
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}
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}
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