Javascript Read Array Values from Function dynamically

Question

How can I pass a array name into a function and read values dynamically?

Dynamically i have generated array as follows

fruits[0] = "Banana";
fruits[1] = "Orange";
fruits[2] = "Apple";

//Hyperlink to activate function below

I have a function in hyeperlink <a href="javascript: activate('1', 'fruits')">Click Me</a>

Below is the function

function activate(idNumber, arrayName)
{
  alert('id is:'+ idNumber); **//Working** 
  alert(arrayName[idNumber]); **//Not working must print fruits[1]**

}

Francis Avila · Accepted Answer · 2012-06-12 21:41:58Z

2

It depends on the scope in which 'fruits' is defined.

Assuming it is global, window[arrayName] will get it when arrayName=='fruits'. This is because window holds a reference to all global objects.

answered Jun 12, 2012 at 21:41

Francis Avila

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1 Comment

Me 4U Over a year ago

Thanks a lot Bro! you saved my day! This one exactly fixed my problem! Cheers!!

sparebytes · Accepted Answer · 2012-06-12 21:41:42Z

1

You are passing in the letters "f","r","u","i","t", and "s" instead of the variable, just remove the quotes from around the variable:

<a href="javascript: activate('1', fruits)">Click Me</a>

answered Jun 12, 2012 at 21:41

sparebytes

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2 Comments

Me 4U Over a year ago

HI Kranklin, Yes i did try passing fruits directly but it says undefined now

sparebytes Over a year ago

Where are you defining fruits? Is your code exactly like what you have or do you have a line like fruits = [] that is before the assignments? If not then just try fruits = ["Banana", "Orange", "Apple"]. Otherwise a jsfiddle.net would be nice to help figure out what's wrong.

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