I am trying to automatically update a javascript array, without specifying a number or string for the key. The value should just take up the next numeric key in the array.

In php you can do this:

<? 
myarray = array();
myarray[] = '1';
myarray[] = '2';
myarray[] = '3';

//this is equivalent to myarray[1] = '1', myarray[2] = '2', myarray[3] = '3'; 


?>

how can I do this in javascript?

this throws an error

$(function(){

var optionset = [];        

optionset[] = 'a';
optionset[] = 'b';

}); 

I am trying to automatically update a javascript array, without specifying a number or string for the key. The value should just take up the next numeric key in the array.

In php you can do this:

<? 
myarray = array();
myarray[] = '1';
myarray[] = '2';
myarray[] = '3';

//this is equivalent to myarray[1] = '1', myarray[2] = '2', myarray[3] = '3'; 


?>

how can I do this in javascript?

this throws an error

$(function(){

var optionset = [];        

optionset[] = 'a';
optionset[] = 'b';

}); 

• php
• javascript
• arrays

Share Improve this question Follow asked Sep 17, 2010 at 8:44 MazatecMazatec 11.6k2323 gold badges7474 silver badges108108 bronze badges

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2 Answers 2

Sorted by: Reset to default 10

optionset.push('a', 'b');

https://developer.mozilla/en/JavaScript/Reference/Global_Objects/Array/push

Mutates an array by appending the given elements and returning the new length of the array.

 optionset.push('a');
 optionset.push('b');

See push() on W3Schools for more details.