---
name: "HashMapKey"
type: topic
source: https://community.bistudio.com/wiki/HashMapKey
revid: 330441
updated: 2022-09-15T21:04:29Z
---

# HashMapKey

HashMapKey is a virtual compound type containing all the possible types that can be used as keys in a [HashMap](../topics/HashMap.md).

The types are:
- [Number](../topics/Number.md)
- [Boolean](../topics/Boolean.md)
- [String](../topics/String.md)
- [Code](../topics/Code.md)
- [Side](../topics/Side.md)
- [Config](../topics/Config.md)
- [Namespace](../topics/Namespace.md)
- [NaN](../topics/NaN.md)
- [Array](../topics/Array.md)

<sub>Source: [BI Community Wiki — HashMapKey](https://community.bistudio.com/wiki/HashMapKey) (revision 330441).</sub>