bennadel/try-finally.htm

## try-finally.htm
<!doctype html>
<html>
<head>
	<meta charset="utf-8" />

	<title>
		Sometimes I'm Tempted To Use Try / Finally In The Worst Way
	</title>
</head>
<body>

	<script type="text/javascript">

		var cache = {
			foo: "bar",
			hello: "world",
			fizz: "buzz"
		};

		// The extracItem() will pull the item out of the cache (ie, delete it), and
		// then return it.
		console.log( "Extracted:", extractItem( "foo" ) );
		console.log( "Extracted:", extractItem( "fizz" ) );
		console.log( cache );


		// I remove the given key from the cache and return the value.
		function extractItem( key ) {

			// WARNING: Never do this (for a variety of reasons). This is just something
			// that I am occasionally ** TEMPTED ** to do when I get super frustrated at
			// the fact that I have to create an intermediary variable to hold the value
			// before I delete the key from the hash. More than anything, this is just to
			// demonstrate that the concept works... NOT that it is good.
			try {

				return( cache[ key ] );

			// After we've returned the value, delete the key.
			} finally {

				delete( cache[ key ] );

			}

		}

	</script>

</body>
</html>
	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8" />

	<title>
	Sometimes I'm Tempted To Use Try / Finally In The Worst Way
	</title>
	</head>
	<body>

	<script type="text/javascript">

	var cache = {
	foo: "bar",
	hello: "world",
	fizz: "buzz"
	};

	// The extracItem() will pull the item out of the cache (ie, delete it), and
	// then return it.
	console.log( "Extracted:", extractItem( "foo" ) );
	console.log( "Extracted:", extractItem( "fizz" ) );
	console.log( cache );


	// I remove the given key from the cache and return the value.
	function extractItem( key ) {

	// WARNING: Never do this (for a variety of reasons). This is just something
	// that I am occasionally TEMPTED to do when I get super frustrated at
	// the fact that I have to create an intermediary variable to hold the value
	// before I delete the key from the hash. More than anything, this is just to
	// demonstrate that the concept works... NOT that it is good.
	try {

	return( cache[ key ] );

	// After we've returned the value, delete the key.
	} finally {

	delete( cache[ key ] );

	}

	}

	</script>

	</body>
	</html>