Build a Space Mission Roster - Step 13

JavaScript
1

Tell us what’s happening:

I have followed the steps in the instructions. I created a for loop to iterate through the updatedCrew array. I included instructions to log the astronauts names. After the loop, I returned the array. The names are not logging to the console. And the error message states “You should use a for loop to iterate through the updated Crew array and log the name of each astronaut”. I have been trying for a week to see what I’m doing wrong.

Your code so far

const squad = [];

const firstAstronaut = {
  id: 1,
  name: "Andy",
  role: "Commander",
  isEVAEligible: true,
  priority: 3
};

function addCrewMember(crew, astronaut) {
  for (let i = 0; i < crew.length; i++) {
    if (crew[i].id === astronaut.id) {
      console.log("Duplicate ID: " + astronaut.id);
      return;
    }
  }
  crew.push(astronaut);
}

addCrewMember(squad, firstAstronaut);

const remainingCrew = [
  { id: 2, name: "Bart", role: "Pilot", isEVAEligible: false, priority: 8 },
  { id: 3, name: "Caroline", role: "Engineer", isEVAEligible: true, priority: 4 },
  { id: 4, name: "Diego", role: "Scientist", isEVAEligible: false, priority: 1 },
  { id: 5, name: "Elise", role: "Medic", isEVAEligible: true, priority: 7 },
  { id: 6, name: "Felix", role: "Navigator", isEVAEligible: true, priority: 6 },
  { id: 7, name: "Gertrude", role: "Communications", isEVAEligible: false, priority: 4 },
  { id: 8, name: "Hank", role: "Mechanic", isEVAEligible: true, priority: 2 },
  { id: 9, name: "Irene", role: "Specialist", isEVAEligible: true, priority: 5 },
  { id: 10, name: "Joan", role: "Technician", isEVAEligible: false, priority: 1 },
];

for (let i = 0; i < remainingCrew.length; i++) {
  addCrewMember(squad, remainingCrew[i]);
}

function swapCrewMembers(crew, fromIndex, toIndex) {
  if (
    fromIndex < 0 || 
    toIndex < 0 ||
    fromIndex >= crew.length ||
    toIndex >= crew.length
  ) {
    console.log("Invalid crew indices");
    return;
  }

  const updatedCrew = crew.slice();
  updatedCrew[fromIndex] = updatedCrew.splice(toIndex, 1, updatedCrew[fromIndex])[0];

// User Editable Region


  for (updatedCrew.name in updatedCrew){
  console.log(`${updatedCrew.name}`);
  
  }  
  return updatedCrew;

// User Editable Region

}

Your browser information:

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Challenge Information:

Build a Space Mission Roster - Step 13

Build a Space Mission Roster - Step 12
2

Hi @jfo0707
Please look at the console output carefully to identify the issue. Then compare how for...in loops behave with how for...of loops behave!!

2 Likes
3

Thank you. Your suggestion prompted me to examine what I was asking the loop to do. I changed to a for…of loop and changed the first parameter to solve the problem. Thanks again.

2 Likes