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Count object in array (HTML)

By : R.Kuwanda
Date : September 17 2020, 04:00 AM
around this issue I want to count the objects in an array, I have this code which does not work in HTML. It has to be shown in HTML. , You can use reduce too to count fruit types.
code :
var markers = [

const countFruitTypes = markers.reduce((a, {type}) => {
    a[type] = (a[type] || 0) + 1;
    return a;
}, {});


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decrease count value for array inside objects and count once reach zero automatically remove that object using java scri

By : Brizeux
Date : March 29 2020, 07:55 AM
like below fixes the issue Use array#forEach to iterate through your array and check each sid and offid inside service, in case of match update the count value after that check if count value is less than or equal to zero, if it is, then using push its index into indexes array. After that, you can iterate through indexes array and delete those values in services array using array#splice.
code :
const obj = { name:'saloon', services:[ { sid:1, offid:20, count:2 }, { sid:2, offid:18, count:1 }, { sid:3, offid:15, count:3 } ] };

const servid = 2;
const offid = 18;
var indexes = [];
obj.services.forEach(function(service, index) {
  if(service.sid === servid && service.offid === offid){
  if(service.count <= 0)

  obj.services.splice(index, 1);

how to resolve this error " [ErrorException] count(): Parameter must be an array or an object that implements Count

By : Solmorth
Date : March 29 2020, 07:55 AM
I hope this helps you . i found this error too when i installed laravel with PHP 7.2, apparently it doesn't support 7.2 yet, try downgrade your PHP to PHP 7.0, it works for me.

How to count occurrences of object by property value, and store count with objects in new array

By : user2385190
Date : March 29 2020, 07:55 AM
may help you . There are a number of ways this can be achieved. One approach would be construct a mapping via the Array#reduce method, which maps each type to the corresponding item with count data included by the following (note that the use of a mapping like this is an optimisation):
iterate your input array for each iteration, reduce the input to an mapping where the key of the map is the item type, and the value is the item (with count) if a value for type key is found in the mapping, increment the count of the matching item if a value for type key is not found in the mapping, insert a clone of the current item being iterated in reduce(), with an initial count of 1 included for that item Pass the mapping created by reduce() to Object.values() to extract a flat Array of the items with corresponding counts computed during the reduction
code :
let arrayOfObjects = [
    {name: 'Disney', type: 'inteira'},
    {name: 'Bottieli', type: 'inteira'},
    {name: 'Monster Truck', type: 'inteira'},
    {name: 'Xuxa', type: 'desconto'},
    {name: 'Pokémon', type: 'zaffari'},

/* Iterate arrayOfObjects and reduce() this to a temporary mapping where item counts
are aggregated. Once that mapping is built, we'll extract values of the mapping to
get the desired array result (ie with items, and type counts) */
let newArrayOfObjects = Object.values(arrayOfObjects.reduce((mapping, item) => {
  /* Find exsiting item with matching item type in our mapping */
  const { [item.type]:matchingItem } = mapping;
  /* If matching item found, increment the count */
  if(matchingItem) {
    matchingItem.count ++;
  /* Otherwise, insert item into mapping, and also include a starting count of one for it */
  else {
    mapping[ item.type ] = { ...item, count : 1 };
  /* Return the updated mapping */
  return mapping;



Getting array count with PHP, inserting count in HTML and fetching with Javascript

By : user3631057
Date : March 29 2020, 07:55 AM
may help you . the getElementsByClassName() method returns an array of matching elements, so you want to get the first one with index=0:
let resultAmount = document.getElementsByClassName('main-results')[0]

How to create object from array? array value is become key of object and count duplicate value is become value of object

By : golemB
Date : March 29 2020, 07:55 AM
it helps some times Is this what you're trying to achieve? https://jsfiddle.net/yf184qob/
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