Build a Space Mission Roster - Step 31

JavaScript
1

Tell us what’s happening:

I keep on getting this error “You should use a for loop to iterate through the sorted array and log the name of each astronaut.” i have tried a list of other arrays but nothing is working. This is what my function currently looks like:

function printCrewSummary(crew) {
const sorted = crew.slice();
for (let i = 0; i < sorted.length; i++) {
console.log(sorted[i].name);

Thank you

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];

  return updatedCrew; 
}

const updatedSquad = swapCrewMembers(squad, 2, 5);

function sortByPriorityDescending(crew) {
  for (let i = 0; i < crew.length - 1; i++) {
    for (let j = 0; j < crew.length - 1 - i; j++) {
      if (crew[j].priority < crew[j + 1].priority) {
        const temp = crew[j];
        crew[j] = crew[j + 1];
        crew[j + 1] = temp;
      }
    }
  }
}

function getEVAReadyCrew(crew) {
  const eligible = [];
  for (const astronaut of crew) {
    if (astronaut.isEVAEligible) eligible.push(astronaut);
  }
  sortByPriorityDescending(eligible); 

  return eligible;
}

const EVAReadySquad = getEVAReadyCrew(updatedSquad);
function chunkCrew(crew, size) {
  if (size < 1) {
    console.log("Chunk size must be >= 1");
    return;
  }

  const chunks = [];
  for (let i = 0; i < crew.length; i += size) {
    chunks.push(crew.slice(i, i + size));
  }

  return chunks;
}

const EVAChunks = chunkCrew(EVAReadySquad, 3);

function printCrewSummary(crew) {
  const sorted = crew.slice();

// User Editable Region

  for (let i = 0; i < sorted.length; i++) {
  console.log(sorted[i].name);

// User Editable Region

}
}

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Challenge Information:

Build a Space Mission Roster - Step 31

2

Welcome to the forum @22armando1994

Please add the following console log to see the output of the for loop.

console.log(printCrewSummary(squad));

Happy coding

3

Welcome @22armando1994,

function printCrewSummary(crew) {
  const sorted = crew.slice();
  sortByPriorityDescending(sorted); 

}

This was the starting code, which you have changed. This will cause the tests to fail. Please reset this step and add your code without changing any of the previous code. Then you can debug as @Teller suggested.

Happy coding!

4

Thank you. it worked after the “sortByPriorityDescending(sorted);” was added back.

just a follow up questions, so i can better understand. what is the reason behind why it wont work without this?

5

The test checks the names are logged in a certain order.