Class: LruCache

LruCache(limit, onEvictopt)

A standard Least Recently Used (LRU) Cache implementation. Uses JavaScript Map's insertion order preservation to maintain recency.

Constructor

new LruCache(limit, onEvictopt)

Parameters:
Name Type Attributes Default Description
limit number

Maximum number of items allowed in the cache.
onEvict function <optional>
 null

Optional callback triggered when an item is evicted.
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Classes

LruCache

Members

size

Returns the current number of items in the cache.

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Methods

clear()

Clears all items from the cache.

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delete(key) → {boolean}

Deletes an item from the cache.

Parameters:
Name Type Description
key string
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Returns:

True if the item existed and was removed.

Type
boolean

get(key) → {*}

Retrieves an item from the cache and updates its recency.

Parameters:
Name Type Description
key string
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Returns:

The cached value, or undefined if not found.

Type
*

has(key) → {boolean}

Checks if a key exists in the cache without updating its recency.

Parameters:
Name Type Description
key string
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Returns:
Type
boolean

set(key, value)

Inserts or updates an item in the cache. Evicts the least recently used item if limit is exceeded.

Parameters:
Name Type Description
key string
value *
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