---
title: "==(_:_:)"
framework: combine
role: symbol
role_heading: Operator
path: "combine/publishers/zip4/==(_:_:)"
---

# ==(_:_:)

Returns a Boolean value that indicates whether two publishers are equivalent.

## Declaration

```swift
static func == (lhs: Publishers.Zip4<A, B, C, D>, rhs: Publishers.Zip4<A, B, C, D>) -> Bool
```

## Parameters

- `lhs`: A zip publisher to compare for equality.
- `rhs`: Another zip publisher to compare for equality.

## Return Value

Return Value true if the corresponding upstream publishers of each zip publisher are equal; otherwise false.