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?
I need to iterate over an array of strings, count the occurrences of each string, and return a object with the value and the number of occurrences. I'm trying to use the array reduce function to achieve such thing, but,…
I have below sample data array of object and submittedValue object. The data array of object is constant it won't change but submitttedValue object will change as user proceed with the answer. I have put below desired result need to…
Novice JS developer, need some help in identifying what I am doing wrong. I have an array of objects const ll = [{name:"a", ids:[1]}, {name:"b", ids:[2,3]}]; I want to convert it to following [ { name: 'a', ids: null, id:…