---
title: "hash(into:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/rangeset/ranges-swift.struct/hash(into:)"
---

# hash(into:)

Hashes the essential components of this value by feeding them into the given hasher.

## Declaration

```swift
func hash(into hasher: inout Hasher)
```

## Parameters

- `hasher`: The hasher to use when combining the components of this instance.

## Discussion

Discussion Implement this method to conform to the Hashable protocol. The components used for hashing must be the same as the components compared in your type’s == operator implementation. Call hasher.combine(_:) with each of these components. important: In your implementation of hash(into:), don’t call finalize() on the hasher instance provided, or replace it with a different instance. Doing so may become a compile-time error in the future.