Chaining exercises

Method chaining is a pattern in JavaScript where multiple functions are called on the same object consecutively. For example:

TeamMembers
  .filter(teamMember => teamMember.age > 10)
  .sort((a, b) => a.age - b.age)

In the following exercises you're going to practice a few array methods. If you don't have a CodePen account create a new one. You can fork the exercises to your own account so your progress will be saved!

• Exercise 1
• Exercise 2
• Exercise 3

Pro tip: You can hide the HTML & CSS tabs by dragging the JS section over the other two. This gives you plenty of space to work with.

More tips

• In these exercises, you will never have to use a return statement!
• Think about the number of items you want to end up with, this can help you decide how to start
• Having selected the right window, using Cmd ⌘ Shift F formats your code
• Check MDN for a list of methods
• You can use the spread operator ... to overwrite a key in an object: {...teamMember, age: 27}
• Use the right array method. For example: .some returns a boolean, while .find returns the first value that satisfies the given condition.