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) =>…
I have an Array of objects and I need to return this collection like Object and they key-names need to be indexes of length. I need to filter this object for it values. Here is my code: const data =…
I want to find the best way to perform a server-side query to find JSON documents by some initial query criteria, then grouping all these documents by some field in the document and then reducing each group to only contain…