I'm attempting to find the number of occurrences based on input value for ownerId in the JavaScript Json Object below. If the ownerId is the number "1" the result should be three since the ownerId appears 3 times. ownerID: 3…
I can add different products as individual arrays and I can also increase and decrease the quantities if the same product added. But I would want to add same product with different size. Below is my code.. Please help out..!…
const arr = [5,1,3,2,6]; const output = arr.reduce(function (acc, curr){ acc = acc + curr; return acc; }, 0); console.log(output); since there is return statement there, why the reduce function keeps iterating as return statement ends any loop or function…
I have the following array const CARS = [ {make: "skoda", model: "kodiaq", color: "light-blue", id: "1002", category: "A"}, {make: "skoda", model: "karoq", color: "green", id: "1008", category: "B"}, {make: "renault", model: "clio", color: "grey", id: "1006", category: "A"}, {make:…
I'm trying to use reduce to take an array of objects and return an object in below expected format. Able to use it to create object based on validFrom but not able to visulize next steps. Tried to use map…
I've looked at lots of examples but cannot get this to work. At best, I end up with a version of the existing array with properties replicated that should be lost in the summary. I would like to output a…
I have an array of objects: const obj = [{ id: 1, name: 'A' }, { id: 1, name: 'A' }, { id: 1, name: 'A' }, { id: 2, name: 'A' }, { id: 2, name: 'A' }] //…
I have a list of objects like const usageCosts = { 224910186407: { deviceId: "224910186407", currency: "GBP", yearlyUsage: 1480.81 }, 224910464538: { deviceId: "224910464538", currency: "GBP", yearlyUsage: 617.36 }, 224910464577: { deviceId: "224910464577", currency: "EUR", yearlyUsage: 522.3 } } I'm…
I've seen many questions on this subject on Stack Overflow, however, they all seem to be returning a single object. (Not what I want) I have an array below; const locations = [ {"city": "London", "district": "Brixton", "id": "Eue3uFjUHKi6wh73QZLX"}, {"city":…
I simply do this: const ar = [1, 2, 3]; ar.reduce(Math.max, 0); // returns NaN ar.reduce((a, c) => Math.max(a, c), 0); // returns 3 as expected Any reason for this behaviour?