What is the total count of different types of objects present in the array?

Question

What is the total count of different types of objects present in the array?

...
let stock = [
  { candy: "Twix", available: 150, weeklyAverage: 200 },
  { candy: "Kit Kat", available: 80, weeklyAverage: 100 },
  { candy: "Skittles", available: 250, weeklyAverage: 170 },
  { candy: "Reese's Pieces", available: 120, weeklyAverage: 40 }
];

// create a function named countCandyVarieties
function countCandyVarieties(stock) {
}
...

I am having trouble figuring out how to iterate through the stock array and determine the total number of candy varieties. The candies in stock include Twix, Kit Kat, Skittles, and Reese's Pieces, totaling 4 varieties. Can someone please assist me in writing the function that should return the final count?

javascript arrays function

Answer 1

Answer №1

It seems you're interested in calculating the total quantity of candies available.

let candyStock = [{
    name: "Hershey's Kisses",
    quantity: 500,
    weeklySales: 100
  },
  {
    name: "Skittles",
    quantity: 300,
    weeklySales: 150
  },
  {
    name: "Reese's Cups",
    quantity: 400,
    weeklySales: 120
  },
  {
    name: "M&M's",
    quantity: 600,
    weeklySales: 200
  }
];


// Define the calculateTotalCandies function here
function calculateTotalCandies(candyStock) {
  let total = candyStock.reduce((acc, item) => {
    acc += item.quantity;
    return acc;
  }, 0)
  console.log(total)
}

calculateTotalCandies(candyStock);

Answer 2

It seems you're interested in calculating the total quantity of candies available.

let candyStock = [{
    name: "Hershey's Kisses",
    quantity: 500,
    weeklySales: 100
  },
  {
    name: "Skittles",
    quantity: 300,
    weeklySales: 150
  },
  {
    name: "Reese's Cups",
    quantity: 400,
    weeklySales: 120
  },
  {
    name: "M&M's",
    quantity: 600,
    weeklySales: 200
  }
];


// Define the calculateTotalCandies function here
function calculateTotalCandies(candyStock) {
  let total = candyStock.reduce((acc, item) => {
    acc += item.quantity;
    return acc;
  }, 0)
  console.log(total)
}

calculateTotalCandies(candyStock);

Answer 3

Answer №2

If you are unsure about what exactly you are trying to tally up. In case you are only interested in counting the variety of candies and each item in the list represents a different type of candy, you can use this function:

function countCandyTypes(inventory) {
  return inventory.length;
}

However, if there could be duplicates of the same type of candy within the list, then you can use this function:

function countCandyTypes(inventory) {
  var types = [];
  for (const record of inventory) {
    if (!types.includes(record.candy)) {
      types.push(record.candy);
    }
  }
  return types.length;
}

Alternatively, if you are simply interested in the total number of candies regardless of the type:

function countCandyTypes(inventory) {
  var count = 0;
  for (const record of inventory) {
    count += record.inStock;
  }
  return count;
}

Answer 4

If you are unsure about what exactly you are trying to tally up. In case you are only interested in counting the variety of candies and each item in the list represents a different type of candy, you can use this function:

function countCandyTypes(inventory) {
  return inventory.length;
}

However, if there could be duplicates of the same type of candy within the list, then you can use this function:

function countCandyTypes(inventory) {
  var types = [];
  for (const record of inventory) {
    if (!types.includes(record.candy)) {
      types.push(record.candy);
    }
  }
  return types.length;
}

Alternatively, if you are simply interested in the total number of candies regardless of the type:

function countCandyTypes(inventory) {
  var count = 0;
  for (const record of inventory) {
    count += record.inStock;
  }
  return count;
}

What is the total count of different types of objects present in the array?

Answer №1

Answer №2

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