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Creating a cumulative objects using javascript

By : aLexNdr
Date : October 17 2020, 08:10 AM
Any of those help You can map() over the dates since you want one result array for each date. Then within the map you can filter() the people based on the date to create that array:
code :
let dates = ['2017-11-5', '2018-3-1', '2018-3-22']

let people = [{name: 'Jes', date: '2017-11-2'}, {name: 'Jill', date: '2018-1-5'}, {name: 'Joe', date: '2018-2-25'}, {name: 'Jack', date: '2018-3-21'}]

let cumul = dates.map(d => people.filter(person => person.date <= d))
console.log(JSON.stringify(cumul, null, 2))

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What is a better way of creating objects in JavaScript?

By : user3890969
Date : March 29 2020, 07:55 AM
it fixes the issue yes, prototype is not created with each object, but is created once for all objects.

Creating Arrays of Objects in nested Objects with Javascript

By : Blade2
Date : March 29 2020, 07:55 AM
around this issue Here's a solution that doesn't require knowing the keys, assuming that you want to convert every other level of nesting:
code :
function toArrayOfObjects(obj) {
  var collection = [];
  for (key in obj) {
    var value = obj[key];
    if (typeof value === 'object' && !Array.isArray(value)) {
      var childObj = {};
      for (childKey in value) {
        var childValue = value[childKey];
        if (typeof childValue === 'object' && !Array.isArray(childValue)) {
          childObj[childKey] = toArrayOfObjects(childValue);
        } else {
          childObj[childKey] = childValue;
    } else {
  return collection;

Creating a cumulative sum column

By : Jeff
Date : March 29 2020, 07:55 AM
like below fixes the issue Sample table ID: (num is a key so there wouldn't be any duplicates) , Try this:

Best practice for creating new objects within objects in Javascript

By : Arnoldo ortiz
Date : March 29 2020, 07:55 AM
hop of those help? Instead of declaring data as an array, declare it as an object, while keeping the declaration of the imgs property as an array:

Creating an array of cumulative sum in javascript

By : oo0v0oo
Date : March 29 2020, 07:55 AM
I wish this help you This is an example of what I need to do: , Javascript's reduce provides the current index, which is useful here:
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