The array's length function is unexpectedly showing zero despite containing elements

Question

The array's length function is unexpectedly showing zero despite containing elements

The quantity of elements in this code is showing as 0 even though it contains a value.

Sample snippet:

for (var q = 0; q < data.data.length; q++) {
var test1 = {
    imgId: data.data.imgId,
    imgString: data.data.imgString
};
vm.imgArr.push(test1);}

console.log(vm.imgArr.length); // displays zero

Example dataset:

data.data = [
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
},
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
},
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
}];

javascript arrays angularjs

Answer 1

Answer №1

You have mistakenly accessed the data within the for loop. To retrieve the value, use data.data[q].imgId

Consider replacing your current for loop with this:

for (var q = 0; q < data.data.length; q++) {
    var test1 = {
        imgId: data.data[q].imgId,
        imgString: data.data[q].imgString
    };
    vm.imgArr.push(test1);
}

Review the following code snippet:

var data={};

data.data = [
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
},
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
},
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
}];

var vm={imgArr:[]};
for (var q = 0; q < data.data.length; q++) {
    var test1 = {
        imgId: data.data[q].imgId,
        imgString: data.data[q].imgString
    };
    vm.imgArr.push(test1);
}

console.log(vm.imgArr);

Answer 2

You have mistakenly accessed the data within the for loop. To retrieve the value, use data.data[q].imgId

Consider replacing your current for loop with this:

for (var q = 0; q < data.data.length; q++) {
    var test1 = {
        imgId: data.data[q].imgId,
        imgString: data.data[q].imgString
    };
    vm.imgArr.push(test1);
}

Review the following code snippet:

var data={};

data.data = [
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
},
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
},
{
    "imgId": "asdasd21321312312asdad",
    "imgString": "heasjahdasdjashdjashd"
}];

var vm={imgArr:[]};
for (var q = 0; q < data.data.length; q++) {
    var test1 = {
        imgId: data.data[q].imgId,
        imgString: data.data[q].imgString
    };
    vm.imgArr.push(test1);
}

console.log(vm.imgArr);

The array's length function is unexpectedly showing zero despite containing elements

Answer №1

Review the following code snippet:

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