Javascript Data Type How to - Get a value in an array within an array

Question

We would like to know how to get a value in an array within an array.

Answer


<!DOCTYPE html>
<html>
<head>
</head><!--  w w w  .  ja v a2  s .co  m-->
<body>
<script>  
var a = new Array();   
a["123"] = ["a","b","c"];
a["456"] = ["d","e","f"];
a["789"] = ["g","h","i"];
b = a["123"][2];
document.writeln(b)  
document.writeln('<br/>');
document.writeln('<br/>');
document.writeln('<br/>');
document.writeln('<br/>');
document.writeln(JSON.stringify(a));
</script>
</body>
</html>

The code above is rendered as follows: