I have a scenario where I need to update tire quantities in an array like this:
tires: [{
name: "fancyProduct1",
quantity: 1
}, {
name: "fancyProduct1",
quantity: 1
}, {
name: "fancyProduct1",
quantity: 1
}, {
name: "fancyProduct2",
quantity: 1
}];
My goal is to achieve the following structure:
tires: [{
name: "fancyProduct1",
quantity: 3
}, {
name: "fancyProduct2",
quantity: 1
}]
Does anyone have any suggestions on the best approach to tackle this?
To consolidate the array into a single object, you can utilize the reduce method. Afterwards, convert the object into an array using Object.values.
let vehicles = [{"type":"car1","quantity":1},{"type":"car1","quantity":1},{"type":"car1","quantity":1},{"type":"car2","quantity":1}];
let finalResult = Object.values(vehicles.reduce((acc, {type, quantity}) => {
acc[type] = acc[type] || {type, quantity: 0}
acc[type].quantity += quantity;
return acc;
}, {}));
console.log(finalResult);To achieve this, you can use the Reduce method as shown below:
var items = { books: [ {title: "The Great Gatsby", quantity: 1}, {title: "To Kill a Mockingbird", quantity: 2}, {title: "1984", quantity: 3}] };
var finalResult = items.books.reduce((accumulator,currentItem) => {
if (!accumulator[currentItem.title]) {
accumulator[currentItem.title] = { title: currentItem.title, quantity: 0};
}
accumulator[currentItem.title].quantity++;
return accumulator;
}, {});
var finalArrayResult = Object.values(finalResult);
console.log(finalArrayResult);
You can easily iterate over the items in an array using Array.forEach() function. To check if a specific item exists in an array and manipulate your logic accordingly, you can use Array.find().
Here's how you could structure your code:
var result = [];
tires.forEach(function(el) {
let found = result.find(o => o.name === el.name);
if (found) {
found["quantity"] += el["quantity"];
} else {
result.push(el);
}
});
Check out this demo:
var tires = [{
name: "fancyProduct1",
quantity: 1
}, {
name: "fancyProduct1",
quantity: 1
}, {
name: "fancyProduct1",
quantity: 1
}, {
name: "fancyProduct2",
quantity: 1
}];
var result = [];
tires.forEach(function(el) {
let found = result.find(o => o.name === el.name);
if (found) {
found["quantity"] += el["quantity"];
} else {
result.push(el);
}
});
console.log(result);One possible solution is to implement the following...
let newTires = tires.map(number => (
// Include logic here to generate a new array with attributes from items in tires.
console.log(number); // This will display the available properties of the current item in the console.
)};
I trust this information proves beneficial.
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