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javascriptarraysvariablescheckbox
Dan
Dan

Reputation: 2344

Accessing a JavaScript array using a value passed into a function

I have a JavaScript array declared in my JavaScript page like so:

var example = [[20,870,5,1,1,16],[28,1250,8,1,1,23]];

This works fine when accessed elsewhere.

I have a checkbox in my HTML page like so:

<input type="checkbox" id="example" onChange="update('example')">Example

I want the function to look something like below. The variable being passed is also the name of my JS array. I will have 20-30 check boxes and I would ideally like to avoid a load of if/else statements.

function update(a) {

alert(a[0][1]);

}

Is there anyway to use the variable passed into my function to access the namesake JS array?

Thanks

Upvotes: 0

Views: 36

Answers (2)

guest271314
guest271314

Reputation: 1

If example is defined, you can remove quotes surrounding parameter example at update(example) call

<script>
  var example = [
    [20, 870, 5, 1, 1, 16],
    [28, 1250, 8, 1, 1, 23]
  ];

  function update(a) {
    alert(a[0][1]);
  }
</script>

<input type="checkbox" id="example" onchange="update(example)">Example

Upvotes: 1

pgraham
pgraham

Reputation: 446

Try

function update(a) {
    alert(window[a][0][1]);
}

Upvotes: 0

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