Algorithmen (Animationen)Läuft in Ihrem BrowserGeprüft am 1. Oktober 2026

LRU Cache: Animation

LRU Cache: Animation. Animierte Frontend-Algorithmen: Sortieren, Suchen, Debounce und Throttle, Event Loop, virtuelles DOM, Caches, Trie und Pfadsuche. Schnell, privat und einfach im Browser nutzbar.

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Die Bedienelemente des Tools unten sind vorerst auf Englisch.

Data structuresTime: O(1) per operationSpace: O(capacity)

Cache sizeOperations (put X / get X)

Cache: oldest → newest

Operation log

empty

Step 1 / 14

An LRU (least recently used) cache keeps at most 3 items. When it is full, the item that has not been used for the longest time is thrown out.

checking
found / in view
ruled out

JavaScript

1class LRUCache {
2  constructor(capacity) { this.cap = capacity; this.map = new Map(); }
3  get(key) {
4    if (!this.map.has(key)) return -1;
5    const value = this.map.get(key);
6    this.map.delete(key);
7    this.map.set(key, value);
8    return value;
9  }
10  put(key, value) {
11    this.map.delete(key);
12    this.map.set(key, value);
13    if (this.map.size > this.cap) {
14      this.map.delete(this.map.keys().next().value);
15    }
16  }
17}

Tip: use the arrow keys to step and the space bar to play or pause.

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