I have an array of items, where i need to get a string of each product price.
const input = [{id: 1, amount: 20}, {id: 2, amount: 40}, {id: 3, amount: 90}]
const output = input?.reduce((acc, curr) => {
acc += `$${curr.amount}+`;
return acc;
}, '')
console.log(output)Expected output is $20+$40+$90
But when i am trying this code i am getting the sum as $150 and i don't want to have + at the last if there are no more items.
Why Array.reduce()? This is a classic example for Array.map():
const input = [{id: 1, amount: 20}, {id: 2, amount: 40}, {id: 3, amount: 90}]
const expression = input.map(
({ amount }) => `$${amount}` // destructure the object, keep only .amount
).join('+');
console.log(expression);Read about destructuring in the JavaScript documentation.
const input = [{ id: 1, amount: 20 }, { id: 2, amount: 40 }, { id: 3, amount: 90 }]
const output = input?.slice(1).reduce((acc, curr) => {
acc += `+$${curr.amount}`;
return acc;
}, input.length ? `$${input[0].amount}` : '');
console.log(output)with minimum manipulation