Mastering Swift 2 Programming (Video 13)

The video tutorial explores higher order functions, focusing on the filter function in Swift. It discusses the implementation and use cases of custom and Swift's filter functions, highlighting their differences and performance aspects. The tutorial applies the filter function in the Game of Life application, demonstrating functional programming techniques. It also covers setting up the game interface with a timer and gesture recognizer. The video concludes with a preview of the next topic, the map function.

What is a key characteristic of higher order functions?

• They can only return other functions.

• They accept another function as an argument.

• They are exclusive to Swift.

• They are used for error handling.

How does Swift's filter function differ from a custom implementation?

• It uses a for loop instead of a while loop.

• It cannot throw exceptions.

• It uses a generator and can throw exceptions.

• It is slower than custom implementations.

What is the purpose of the filter function in the Game of Life?

• To create new cells.

• To determine which cells are living.

• To delete dead cells.

• To change the color of cells.

What is the role of the tap gesture recognizer in the game setup?

• To change the color of the grid.

• To pause the game.

• To reset the game board.

• To start a timer when the grid is tapped.

What does the initialize game method do?

• It stops the game.

• It randomizes cell states for a new game.

• It saves the current game state.

• It changes the game speed.

What happens when the reset button is pressed?

• The game board changes color.

• The game pauses.

• The game board is redrawn and the timer is invalidated.

• The game speed increases.

What is the purpose of the moment method in the game?

• To save the game state.

• To evolve the game state and redraw the board.

• To change the game rules.

• To pause the game.