Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript React by Example Building the Application Removing Names From the List

Sam Gord
Sam Gord
14,084 Points
Posted by Sam Gord
Sam Gord
14,084 Points

check my solution and tell if theres any disadvantage using the method i used,

for creating a function to delete Guest what i did was to filter the guests array like this -->

  deletePlayer = indexToDelete => {
    this.setState({
      players: this.state.players.filter((player, index) => {
        if (indexToDelete !== index) {
          return player;
        }
        return null;
      })

    })
  }

instead of using two slices like what the teacher did, can you detect any problems with my code? thanks so much

2 Answers

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

Have you tested this thoroughly? the MDN page recommends that arrow function expressions "... are best suited for non-method functions," probably because of the fact they don't establish "this" like conventional functions do. So your references to "this" will bind to whatever it represents in the outer context.

Sean Paulson
Sean Paulson
6,669 Points
Sean Paulson
Sean Paulson
6,669 Points

If you were using hooks instead of classes you would not have to worry about 'this' and it would be fine. Also you can remove the if statement

      players: this.state.players.filter((player, index) => indexToDelete !== index)