When fetching data from multiple JSON files with different number of data columns it returns undefined and breaks loop,

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When fetching data from multiple JSON files with different number of data columns it returns undefined and breaks loop,
Jquery json multiple data returns undefined
Ember Data breaks when fetching JSON from Node + Express REST server
How to fix fetching JSON data on inside of loop with limit number?
Fetching data from local .json file in react.js returns multiple errors
Action Payload returns as undefined when fetching data in Redux

When fetching data from multiple JSON files with different number of data columns it returns undefined and breaks loop,

Tag : jquery , By : Frank

Date : November 29 2020, 09:01 AM

I think the issue was by ths following , You might need to do a bit of tweaking but this should get you very close:

   $.getJSON('data/lige.json', function (lige) {
  lige=lige.lige; // the file actually has an object whose first key is lige and we name the variable lige, to avoid confusion, normalize it here
  $.getJSON('data/ponude.json',function (ponude) {
    var tables=[];
    $.each(lige, function(li, le) {
      var lige_naziv = le.naziv; // string
      var lige_tipovi =le.razrade[0].tipovi; // array of objects, represents header values
      var lige_ponude=le.razrade[0].ponude; // array of int, represents row ids

      var title='<div class="head">'+lige_naziv+'</div>';

      var headers= li == 2 ? ['<th colspan="3"></th>'] : ['<th colspan="4"></th>']; // make long part of header
      var neededColumns=[]; // this part is key
      $.each(lige_tipovi, function(lti, lte) {  // lte =  [ {"naziv": "1" },...... ]
        headers.push('<th>'+lte.naziv+'</th>');
        neededColumns.push(lte.naziv); // track which ones we need for later
      });
      headers='<tr>'+headers.join('')+'<tr>';

      var trs=[];
      $.each(lige_ponude, function(lpi, lpe) {  // lige_ponude =  [ 8991909, .... ]  ,  lpe =  8991909

        var found_ponude=false; // find the one with this id in the other json set, start out as false
        $.each(ponude, function(pi, pe) {  // pe = {  "broj":"12", "id":8991909, ....... }
          if(pe.id==lpe){
            found_ponude=pe; // found it
            return false;
          }
        });
        if(found_ponude){ // make sure we found one
          var tds=['<td>'+found_ponude.broj+'</td><td>'+found_ponude.naziv+'</td>'];
          // now we loop over neededColumns NOT all of this group's values because there might be more on the group than on our table
          $.each(neededColumns, function(nci, nce) {  // neededColumns = [ 1, x, 2, ....]  , represents header columns that need to be filled in
            var found_ponude_tecajevi=false; // find the stored column value for this column, start out as false
            $.each(found_ponude.tecajevi, function(fpti, fpte) {  // tecajevi = [ { "tecaj":4.0,"naziv":"1"},... ]  , represents column values stored on object
              if(fpte.naziv==nce){ // found it
                found_ponude_tecajevi=fpte.tecaj || '-';
                return false;
              }
              else found_ponude_tecajevi ='-'; //didnt find it
            });
            tds.push('<td>'+found_ponude_tecajevi+'</td>')
          });
          tds.splice(1, 0, '<td>Time Here</td>');
          if(li==2){// we are on the second table and need to insert the signal icon as the 3rd column
            tds.splice(1, 0, '<td>Icon Here</td>');
          }
          trs.push('<tr data-ponude-id="'+lpe+'">'+tds.join('')+'</tr>'); // create row
        }
      });
      tables.push(title+'<table><thead>'+headers+'</thead><tbody>'+trs.join('')+'</tbody> </table>'); // create table
    });
    $('#data-output').html(tables.join('')); // add to page
  });
});

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When fetching data from multiple JSON files with different number of data columns it returns undefined and breaks loop , How to fix fetching JSON data on inside of loop with limit number , Fetching data from local .json file in react.js returns multiple errors , Jquery json multiple data returns undefine ,

Jquery json multiple data returns undefined

Tag : php , By : Aires

Date : March 29 2020, 07:55 AM

wish helps you data is an object and you can access directly the a and b keys. If not, then you have to parse the JSON data using JSON.parse() method.

success: function(data) {
    data = JSON.parse(data);
    alert(data.a);
    alert(data.b);       
}

Ember Data breaks when fetching JSON from Node + Express REST server

Tag : node.js , By : Brazen

Date : March 29 2020, 07:55 AM

will help you Looks like the mistake I made was in declaring model. ID attribute shouldn't be declared here, correct model looks like this:

App.Book = DS.Model.extend({
    author: DS.attr('string'),
    title: DS.attr('string')
});

How to fix fetching JSON data on inside of loop with limit number?

Tag : javascript , By : Juice

Date : March 29 2020, 07:55 AM

I think the issue was by ths following , There is something bothers me. I'm trying to understand this output in console, take a look , Use this

listdata.orders.forEach(function (order) {
    console.log(order.id_order);
});

listdata.orders.slice(0, 9).forEach(function (order) {
    console.log(order.id_order);
});

listdata.orders.some(function (order, index) {
    if (index > 9) {
        return true;
    }
    console.log(order.id_order);
});

Fetching data from local .json file in react.js returns multiple errors

Tag : json , By : 66.

Date : March 29 2020, 07:55 AM

will help you The question has been solved, The main issue was with defining const names such as const results = [] which should've been const results = props.results || [].
The code has been updated incase you have problems aswell.

Action Payload returns as undefined when fetching data in Redux

Tag : reactjs , By : Arun Thomas

Date : March 29 2020, 07:55 AM

will be helpful for those in need I am porting over a React application to use Redux. I can see that the action is firing on the click event, but when I add console.log to the action in the reducer, I'm seeing an undefined value. , I think that return statement is missing:

export const generateQuote = () => dispatch => {
  const randomNum = (Math.floor(Math.random() * (500 - 1)) + 1);
  return fetch(`https://jsonplaceholder.typicode.com/comments?id=${randomNum.toString()}`)
  .then(res => res.json())
  .then(data => 
    dispatch({
      type: GENERATE_QUOTE, 
      payload: data[0],
      date: Date(Date.now())
  }) 
 ).catch(error => console.log(error))
}