webpack.StackedMap

new StackedMap(): StackedMap

• map {Map<K, InternalCell>}
• size <number> Returns the number of visible keys after collapsing the stack.
• stack {Map<K, InternalCell>[]}

asArray(): K[]

Returns the visible keys as an array after collapsing the stack.

asMap(): Map<K, Cell<V>>

Returns the visible contents as a plain Map.

asPairArray(): [K, Cell<V>][]

Returns visible key/value pairs using the external representation.

asSet(): Set<K>

Returns the visible keys as a Set after collapsing the stack.

createChild(): StackedMap

Creates a child StackedMap that sees the current layers as its parent scope.

delete(item): void

• item {K}
• Returns: <void>

Deletes a key from the current view, either by removing it outright in the root layer or by recording a tombstone in child layers.

get(item): void

• item {K}
• Returns: {Cell}

Returns the visible value for a key, caching parent hits and misses in the current layer.

has(item): void

• item {K}
• Returns: <boolean>

Checks whether a key exists in the current scope chain, caching any parent lookup result in the current layer.

set(item, value): void

• item {K}
• value {V}
• Returns: <void>

Stores a value in the current layer, preserving explicit undefined values with an internal marker.