hypertune/dist/shared/helpers/LRUCache.js

[Hypertune](https://www.hypertune.com/) is the most flexible platform for feature flags, A/B testing, analytics and app configuration. Built with full end-to-end type-safety, Git-style version control and local, synchronous, in-memory flag evaluation. Opt

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
// LRUCache relies on the fact that Map stores keys in their insertion order.
class LRUCache {
    constructor(maxSize) {
        this.maxSize = maxSize;
        this.cache = new Map();
    }
    get(key) {
        if (!this.cache.has(key)) {
            return null;
        }
        const value = this.cache.get(key);
        // Refresh key.
        this.cache.delete(key);
        this.cache.set(key, value);
        return value;
    }
    set(key, value) {
        this.cache.delete(key);
        while (this.cache.size >= this.maxSize) {
            // Evict last used key.
            this.cache.delete(this.cache.keys().next().value);
        }
        this.cache.set(key, value);
    }
    purge() {
        this.cache = new Map();
    }
}
exports.default = LRUCache;
//# sourceMappingURL=LRUCache.js.map