javascript global array

Question

I am having below html code and trying to add new values to global array by onchanging of javascript function.I am trying to do like below way.But it is giving javascript errors.Please suggest anyone how to do this.

<html>
<head>
<script>
var list=[];
function getList(value){

list=list(value);
}
</script>

</head>

<body>

<tr>
<td>
<select name="test" onchange="getList(this)">
<option id="1" value="one">One</option>
<option id="2" value="two">two</option>

</select>
</td>
</tr>
<tr>
<td>
<select name="test1" onchange="getList(this)">
<option id="3" value="three">three</option>
<option id="4" value="four">four</option>

</select>
</td>
</tr>

</body>
</html>

How about telling us what the error is? Is the function list defined somewhere (I guess not)? I suggest you read a JavaScript tutorial first: developer.mozilla.org/en/JavaScript/Guide — Felix Kling
– Felix Kling, Commented Apr 11, 2011 at 10:30

Sangeet Menon · Accepted Answer · 2011-04-11 10:31:21Z

8

Change your Javascript to the following

var list=new Array; ///this one way of declaring array in javascript
function getList(value){

list.push(value);//push function will insert values in the list array
}

answered Apr 11, 2011 at 10:31

Sangeet Menon

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3 Comments

user569125 Over a year ago

Thanks,Is values are adding to next index or same index?

Raynos Over a year ago

No need to change [] to new Array

Sangeet Menon Over a year ago

@user569125: list.push() will add the values to next index

Kevin · Accepted Answer · 2011-04-11 10:32:09Z

0

Adding values to an array is quite simple, all you have to do is call the push(..) method.

Like so:

var list = [ ];
list.push(1);

console.info(list); // Outputs: [ 1 ]

answered Apr 11, 2011 at 10:32

Kevin

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Comments

RoToRa · Accepted Answer · 2011-04-11 10:32:33Z

0

The easiest way to add a value to an array in JavaScript, it to use the push method (unless you need to support IE5):

function getList(value) {
  list.push(value);
}

Two things:

In your case this would add references to the select elements to the list. That's most likely not what you want. What exactly do you want to add?
getList isn't really a suitable name for that. addToList would be probably better.

answered Apr 11, 2011 at 10:32

RoToRa

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Comments

Town · Accepted Answer · 2011-04-11 10:37:15Z

0

You're currently passing the entire select element to your function, rather than the selected value. You can pass the selected value like this:

getList(this.options[this.selectedIndex].value)

Then you can use list.push(value) in your function to add the selected value to your array.

edited Apr 11, 2011 at 10:37

answered Apr 11, 2011 at 10:32

Town

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