Question: How would I implement a Uniform Crossover method in Java for a Genetic Algorithm? 

Currently, I am using 2 ArrayLists which need to be interconnected before the program continues. Below is the start of the method I have been using:

```
private void UniformCrossOver(int ListOne,int ListTwo)
{
...
}

```

Where I stand at the moment, I am assuming that I will need to make another 2 ArrayLists which will have the data split into but I have no idea where to start with the crossover. Would I use a for loop with the size of the new arrays being the defining key?

Your help would be greatly appreciated.

Answer: 
It is not possible to use the Swift Package Manager in a playground at this time. The reason for that is that the Swift Package Manager is primarily used outside of apple platforms. 

[Apple](https://github.com/apple/swift-package-manager/) mentions this on the Swift Package Manager's GitHub:

> 
> Note that at this time the Package Manager has no support for iOS, watchOS, or tvOS platforms
> 
> 
> 

The Swift Package Manager is especially useful for writing Swift for platforms such as Linux and Mac. Uses may include creating servers based written in Swift or writing programs that can be run without a user interface (think home automations and IoT). It is a great way to organize packages without using Pods or other third-party setups. When you build the code for production (or debugging) it will download and incorporate packages into the project.

Note: This may change in the future, but is current as of Swift 3
In Xcode 12, playgrounds can work seamlessly with swift packages in a project.

Please follow the steps below:

1. Create a project named `Playground`:

File → New → Project... (⇧⌘N) → Product Name: Playground

⚠️ You can name it whatever you want, here is just an example.
2. Add a swift package for the project, such as `SnapKit`:

File → Swift Packages → Add Package dependency... → <https://github.com/SnapKit/SnapKit.git>
3. Create a playground and add it to the project created in the first step:

File → New → Playground... (⌥⇧⌘N) → Add to: `Playground`
4. Import the swift package (SnapKit) in the Playground:

```
import SnapKit

```

If nothing else, you can use `SnapKit` in the Playground.