I am kind of very new to javascript world. I have a doubt. How do i add/append new values to existing hash. example

var setname = 'set_1', elements = {};
elements[setname] = ['beer','water','wine'];
alert(elements['set_1']);

Now how do i dynamically add more elements to set_1 key? like to extend the set_1 with coffee tea.

Sorry if this question has been repeated and is very trivial, i did my search. I found one article realted to it,how to assign variable value as variable name in a hash?

I am kind of very new to javascript world. I have a doubt. How do i add/append new values to existing hash. example

var setname = 'set_1', elements = {};
elements[setname] = ['beer','water','wine'];
alert(elements['set_1']);

Now how do i dynamically add more elements to set_1 key? like to extend the set_1 with coffee tea.

Sorry if this question has been repeated and is very trivial, i did my search. I found one article realted to it,how to assign variable value as variable name in a hash?

• javascript
• html

3 Answers 3

Here, elements['set_1'] is just a normal Javascript array. The fact that it is a property of the elements object is pletely immaterial to how it behaves. You can add items to it in the normal Javascript way: with push:

elements['set_1'].push('coffee');
elements['set_1'].push('tea');

If you don't know what the property's name will be when you write your code, you can do exactly the same with a variable:

elements[setname].push('coffee');
elements[setname].push('tea');

elements['set_1'].push('foo');

If the value of set_1 is an array you can do this:

var setname = 'set_1', elements = {};
elements[setname] = ['beer','water','wine'];
elements[setname].push('new item');
alert(elements['set_1']);

However, if it is not an array, you will need to take different action.