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:…
I have 2 array. As a result, I should get 1 array. If "groupPoint" matches, then take the data from the "data" array. initialData = [ {groupPoint: '00:00', soldLeads: 0}, {groupPoint: '01:00', soldLeads: 0}, {groupPoint: '02:00', soldLeads: 0}, {groupPoint: '03:00',…
assume i have an array of objects the following const objects = [{ total: 2 }, { total: 5 }, { total: 1 }, { total: 8 },{ total: 2 },{ total: 3 },{ total: 8 },{ total: 1 },{…
Can anyone explain me higher level examples when to use reduce() method in javascript
I have an array of objects that I am currently filtering and mapping, like this: const countries = [ "de", "fr", "nl" ]; const renderDocItem = (doc, country) => { return ( <li className="tabsLi" key={doc._id}> <div className="d-flex w-75 justify-content-between"> <div>…
I was trying to find a solution to find out the number of occurrences of a number in an array and came across the below solution: const occurrences = [5, 5, 5, 2, 2, 2, 2, 2, 9, 4].reduce(function (acc,…
I have an array in this form: const products = [{product: "a", volume: 3}, {product: "b", volume: 7}, {product: "c", volume: 5}], [{product: "a", volume: 8}, {product: "b", volume: 10}, {product: "c", volume: 4}] and I need to sum them…
How should I update the state after a comment is deleted from the db. This is my delete function but I cannot seem to figure out what have to be the contents of dispatch: const onCommentDelete = async (id) =>…