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how to make dynamic javascript array with key and value group


how to make dynamic javascript array with key and value group

By : user2956501
Date : November 22 2020, 10:56 AM
I wish did fix the issue. I am integrating jqbarGraph, the demo worked fine. I want to make the values dynamic. , Does this work?
code :
var graphByMonth = [],
    jsonResponse = {"success":false,"message":{"12":7887,"11":159}},
    data = jsonResponse.message;
Object.keys(data).forEach(function (k, i ) {
    graphByMonth.push([data[k],+k]);
});
console.log(graphByMonth);


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How to make multiple Axios requests using a dynamic array of links in Javascript?

How to make multiple Axios requests using a dynamic array of links in Javascript?


By : Gary
Date : March 29 2020, 07:55 AM
How to group items in dynamic array using Javascript

How to group items in dynamic array using Javascript


By : C. Cabia
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further If your array is sorted, it would be easy to save aside the last "groupName" and print it when encountered with a new group for the first time. If it not sorted call .sort before that.
code :
var basket = ["Apple", "Apple", "Orange", "Orange", "Orange", "Banana"];

let lastGroup = '';
for (var i = 0; i < basket.length; i++) {
  var fruit = basket[i];

  if (lastGroup !== fruit) {
    lastGroup = fruit;
    $("#table").append("<h1>" + fruit + "</h1>");
  }
  $("#table").append("I have " + fruit + "\n");
}
div {
  white-space: pre;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="table"></div>
JavaScript reduce to make an array group

JavaScript reduce to make an array group


By : user2355600
Date : March 29 2020, 07:55 AM
it helps some times I have this group method: , I think I solved this with:
code :
function groupByRange(products) {
    products.sort((a, b) => {
        return a.rangeCode - b.rangeCode
    });

    let groups = products.reduce(function (accumulator, product) {
        let groups = accumulator.filter(item => item.rangeCode === product.rangeCode);
        let found = groups.length === 1;
        let group = found ? groups[0] : { rangeCode: product.rangeCode, products: []};

        group.products.push(product);

        if (!found) accumulator.push(group);

        return accumulator;
    }, []);

    console.log(groups);

    return groups;
}
How to group pivot dynamic array in javascript or MySQL?

How to group pivot dynamic array in javascript or MySQL?


By : Eoin Davey
Date : March 29 2020, 07:55 AM
hop of those help? You could take a hash table and collect all value for a given date/rule pair. Then build a table and use a default zero for not given pairs.
code :
const key = (...a) => a.join('|');

var data = [{ ruleAlias: 'DEMAND', date: '2019-03-22', count: 10 }, { ruleAlias: 'VOUCHER', date: '2019-03-25', count: 20 }, { ruleAlias: 'DEMAND', date: '2019-03-25', count: 10 }, { ruleAlias: 'BILL', date: '2019-03-25', count: 2 }, { ruleAlias: 'BILL', date: '2019-05-06', count: 1 }],
    temp = {},
    result,
    dates = new Set,
    rules = new Set;

data.forEach(({ ruleAlias, date, count }) => {
    dates.add(date);
    rules.add(ruleAlias);
    temp[key(date, ruleAlias)] = (temp[key(date, ruleAlias)] || 0) + count;
});    

result = [
    ['RULE', ...rules],
    ...Array.from(dates, date => [
        date,
         ...Array.from(rules, rule => temp[key(date, rule)] || 0)
    ])
];

console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
Dynamic way to generate a javascript array for each group of checkboxes?

Dynamic way to generate a javascript array for each group of checkboxes?


By : user3641513
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I believe this is what you want. I've set up a codepen to demonstrate.
Tip here: Any time you want to initialise an arbitrary number of variables that you can access later in the global scope, it's usually a good idea to initialise them as properties on an object in the global scope.
code :
const groups = {};

$('input[type="checkbox"]').on("change", function (e) {
  const checkedInput = $(e.target);
  const groupName = checkedInput.attr('name');

  const updatedArray = $(`input[name="${groupName}"]:checked`).map(function(i) {
        return $(this).val();
      }).get();

  groups[groupName] = updatedArray;

  console.log(groups[groupName]);
});
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