How to create dynamic array for pairs of data using javascript?

Question

How to create dynamic array for pairs of data using javascript?

65 views Asked by user1788736 At 12 June 2015 at 01:18

How to create dynamic array for example pairs of data using javascript? i want the exact structure as shown in example data pairs in dynamic array. i tried code below but it seems my array is not correct. could any one help me fix it.Thanks

Note: alert(files.join('\n')); shows [object object] Example of pairs of data to be stored in array

files: [

        {'url': 'http://www.somesite.com/1.jpg', 'filename': 'new1.jpg'},
        {'url': 'http://www.somesite.com/2.jpg', 'filename': 'new2.jpg'},
        {'url': 'http://www.somesite.com/2.jpg', 'filename': 'new3.jpg'},
    ],

My array creation function:

<script>
var i=1;
  files = new Array();   
    function addtoArray(a,b){
    alert("URL:"+a+"\nFileName:"+b);

    files[i] = { url: +a, filename: +b };
    i++;
    alert(files.join('\n'));
    };
</script>
<body>
<button onclick="addtoArray('http://www.somesite.com/1.jpg','new1.jpg')">add to array</button>

<button onclick="addtoArray('http://www.somesite.com/2.jpg','new2.jpg')">add to array</button>

Original Q&A

There are 2 answers

DLH On 12 June 2015 at 01:36

This seems to be working in a Codepen. (http://codepen.io/dharshba/pen/YXQvPP)

<script>
files = [];

function addtoArray(a, b) {
  var obj = {
    url: a,
    filename: b
  };
  files.push(obj);
};
</script>

I believe the +a and +b were at least part of the issue. Using the + operator that way attempts to coerce the strings into numbers, which wasn't really what you wanted.

To answer your question about seeing the array in a human-readable form in an alert, you can use:

alert(JSON.stringify(files));

**aadarshsg** · Accepted Answer · 2015-06-12 01:22:30

aadarshsg On 12 June 2015 at 01:22 BEST ANSWER

Try this.

function addtoArray(a,b){
files.push({ url: a, filename: b });
};

EDIT: Adding code to display the content

alert(JSON.stringify(files));

TechQA.

How to create dynamic array for pairs of data using javascript?

There are 2 answers

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