Question 35951 in Jquery Question posted in
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Why values pushed to the array is not available, even though the array is declared as globally accessable? – Jquery

i have declared an array globally so that i can modify that inside a function. but after i try and modify the array. the array is showing showing any data and the array is alwayes becomes 0.

this is where the function is been callled from:

var vehicleTypesArr = []; //globally accessable.

function loadVehicleTypes(data) {
            if (data != null) {
                var res = data.VehicleTypes;
                if (res != '' && res != null) {
                    $.each(res, function () {
                        if (res.GroupName === 'ConEnhTyp_Vehicle')
                            vehicleTypesArr.push(this);
                           //console() : if i put a console here, the result will the data with specific groupName and prints until the loop is ended with the data.
                    });
                }
            }
            console.log(JSON.stringify(vehicleTypesArr)); // console 1 : result = 0
            resetVehicleTypes(); //here i call 2nd code snippet
};

This is the 2nd code snippet:

function resetVehicleTypes() {
  alert("1");
  if (vehicleTypesArr.length > 0) {
  alert("2");
    $.each(vehicleTypesArr, function (val) {
      val.prop('checked', false); 
  });
  alert("1");
  }
  alert("Finished");
}

the code enters the function and alerts the 1, and then goes staright to the finished alert.

I tried,

on the console() : i put a console and the result was the data with specific groupName and prints until the loop is ended with the data.

but in the console 1 the array is empty. i tried changing length condition and its not working.

still has no supprt.

Tags:

2

Answers


  1. 0

    Try with this.vehicleTypesArr instead of just vehicleTypesArr within your functions

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  2. 0

    Code does work in all(that are shown) possible ways a object can be pushed into array.
    It looks like the issue is with your if statement in each loop. I recommend always using {} braces. Guessing the condition res.GroupName === 'ConEnhTyp_Vehicle' is never true…

    const result1 = document.getElementById('result1');

var vehicleTypesArr = []; //globally accessable.
const some_data = {
  VehicleTypes: [{
      GroupName: 'name 1'
    },
    {
      GroupName: 'name 2'
    }
  ]
};

loadVehicleTypes(some_data);

function loadVehicleTypes(data) {
  if (data != null) {
    var res = data.VehicleTypes;
    if (res != '' && res != null) {
      // alternative to for loops
      //vehicleTypesArr = res.filter(el => el.GroupName === 'ConEnhTyp_Vehicle');
    
      $.each(res, function() {
        // edit: should be this.GroupName instead of res.GroupName
        //if (res.GroupName === 'ConEnhTyp_Vehicle') // not needed for test
        vehicleTypesArr.push(this); // works
        vehicleTypesArr.push(JSON.parse(JSON.stringify(this))); // works
        vehicleTypesArr.push(Object.assign({}, this)); // works
        vehicleTypesArr.push({ ...this
        }); // works
      });

      /*
      for (const el of res) {
        vehicleTypesArr.push(el); // works
        vehicleTypesArr.push(JSON.parse(JSON.stringify(el))); // works
        vehicleTypesArr.push(Object.assign({}, el)); // works
        vehicleTypesArr.push({ ...el
        }); // works
      }
      */
    }
  }

  result1.innerHTML = JSON.stringify(vehicleTypesArr);
};
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="result1">test</div>

    Edit:
    Looking back at it. The if statement is checking res.GroupName when it should be checking this.GroupName.

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