logo
Tags down

shadow

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 = [
    {
      type:"Chocolate",
      name:"KitKat",
      group:"candy",
      icon:"candy",
      coords:[5246,8980],
    },
    {
      type:"Fruit",
      name:"Orange",
      group:"fruits",
      icon:"fruis",
      coords:[9012,5493],
    },
    {
      type:"Fruit",
      name:"Banana",
      group:"fruits",
      icon:"fruis",
      coords:[9012,5493],
    },
    {
      type:"Food",
      name:"Rice",
      group:"foods",
      icon:"foods",
      coords:[6724,9556],
    },
    {
      type:"Food",
      name:"Meat",
      group:"foods",
      icon:"foods",
      coords:[6724,9556],
    },
    {
      type:"Food",
      name:"Beam",
      group:"foods",
      icon:"foods",
      coords:[6724,9556],
    },
    {
      type:"Liquid",
      name:"Water",
      group:"liquids",
      icon:"liquids",
      coords:[6724,9556],
    },
    {
      type:"Liquid",
      name:"Coffe",
      group:"liquids",
      icon:"liquids",
      coords:[6724,9556],
    },
 ];


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

console.log(countFruitTypes);


Share : facebook icon twitter icon

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){
    --service.count;
  }
  if(service.count <= 0)
      indexes.push(index);
});

indexes.reverse().forEach(function(index){
  obj.services.splice(index, 1);
});
console.log(obj);

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;

},{}))

console.log(newArrayOfObjects);

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/
Related Posts Related Posts :
  • what's the way to get Timestamp in Google App maker?
  • How to Count the Frequencies of a Word in a String
  • Best practice of providing 'this' context to method in different class
  • Why isn't the test in my jQuery filter function working as expected?
  • using setTimeout in for loop
  • When (if ever) would you use splice instead of slice in Javascript? (best practices)
  • Javascript Regex pattern: Find the secret word
  • Debugging react: breakpoint not stopping in componentDidUpdate as expected
  • Passing expression to Jest.unmock
  • pushState creating duplicate history entries and overwriting previous ones
  • How could I improve and shorten the following algorithm which compares two arrays and returns the symmetric discrepancie
  • How to select distinct property values of a list of object in Angular
  • How can I parse a UDP packet using a c header file in node.js
  • Exporting multiple Highcharts that are generated by looping to a single pdf
  • Can I do this without a server?
  • does ngOnChanges updates input properties?
  • use subscribe() asynchronously
  • JavaScript array has elements but length is zero
  • Reload DIV from page, without changing pages
  • hide html attribute in inspection browsers
  • How can i debounce the execution of a firebase cloud function correctly
  • Java script number format change
  • How can you find something inside cloud Firestore when you don't know the key?
  • How do i get my code to return the result on time
  • Affected days of time range with moment.js
  • React state updates incorrectly
  • Can you use a PL-SQL procedure in JavaScript in a PL-SQL package?
  • What is the purpose of template engines in Java?
  • What is the exact Font of this H1 and can i use it on Windows?
  • Push only one type of item in array
  • Change the state of an image with javasript and html
  • JSX conditional modification of outer element
  • How to access php variable in javascript using echo statement
  • JS function is not defined for IE11
  • How to delete multiple open cache from service worker
  • Regular Expression for multiple folder names in URL and Excluded Extension Flags
  • Trouble on comparing arrays items
  • React not refetching expired cached files
  • Accessing Props to Map over Array in React Child?
  • How to pass ajax call result to subsequent ajax calls
  • InStr vs indexOf
  • Javascript - ensure a string field contains certain char and numbers
  • how to create a grapher below in processing
  • How to combine different css class selectors into one javascript line?
  • Eslint rule to put a new line inside import
  • How to dispatch an action with delay (debounce)
  • Functional programming convert array of Monads to Single Monad of array
  • Cannot find module 'newman' Require stack:
  • How to reorder multiple elements in an array?
  • How to avoid import everything that the component needs in each test file?
  • useReducer React approach
  • Running a function before subscribing
  • Counting every 5th for loop
  • How to display API data using Ajax?
  • Displaying data outside <form>
  • How can i check if selector exists in puppeteer?
  • How filter simple multidimensional array with only numbers
  • why can't I change object property in JavaScript
  • Why can't I access to some elements of document.querySelectorAll
  • Building application with PWA
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk