general-patterns/avoiding-eval.html

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<title>JavaScript Patterns</title>
<meta charset="utf-8">
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<script>
/* Title: Avoiding eval()
   Description: avoid using eval()
*/

// antipattern
var property = "name";
alert(eval("obj." + property));

// preferred
var property = "name";
alert(obj[property]);


// antipatterns
setTimeout("myFunc()", 1000);
setTimeout("myFunc(1, 2, 3)", 1000);

// preferred
setTimeout(myFunc, 1000);
setTimeout(function () {
   myFunc(1, 2, 3);
}, 1000);
// in supported browsers (i.e. not IE)
setTimeout(myFunc, 1000, 1, 2, 3);

// reference
// http://net.tutsplus.com/tutorials/javascript-ajax/the-essentials-of-writing-high-quality-javascript/
</script>
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