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

Sam Gord
Sam Gord
14,060 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
210,867 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
5,641 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)