kolber/getHighestOccurence

## getHighestOccurence
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
	<head>
		<meta http-equiv="content-type" content="text/html; charset=UTF-8">
		<title>Test primacy</title>
		<meta http-equiv="keywords" content="">
		<meta http-equiv="description" content="">
		<style type="text/css" media="screen">
			body {
				padding: 20px;
				font-family: georgia, times, sans-serif;
				letter-spacing: -0.01em;
				line-height: 1.4;
			}

			h1,
			h2,
			p {
				font-weight: normal;
				margin: 0px 0px 4px 0px;
			}

			h1 {
				display: inline;
				border-bottom: 1px solid #cee;
				margin: 0px 0px 8px 0px;
			}

			div.machine-tags {
				width: 200px;
				padding: 10px;
				float: left;
				margin: 20px 60px 0px 0px;
			}
		</style>
		<script type="text/javascript" src="http://www.google.com/jsapi"></script>
		<script type="text/javascript">

			calculatePrimary = function(tags) {
				var uniqueTags = new Array();
				var tagsAsText = new Array();
				// extract text from jquery objects
				tags.each(function(i) {
					tagsAsText.push($(tags[i]).text());
				});

				//tagsAsText = tags.map(function(tag) { $(tags[tag]).text(); });

				// switch keys/values to create a faked unique array
				for (tag in tagsAsText) uniqueTags[tagsAsText[tag]] = tag;
				// you need to sort the array to ensure all common occurences appear next to each other
				uniqueTags.sort();
				// create storage variable
				var primary = { tag: null, count: 0 }
				// store
				var lastCount = 0;
				// use gaps in array to calculate tag with the highest primacy
				for (tag in uniqueTags) {
					// gap equals current index minus last index
					var arrCountGap = uniqueTags[tag] - lastCount;
					// if gap is higher than or equal to the last, overwrite primary storage
					if(arrCountGap >= primary.count) {
						primary.count = arrCountGap;
						primary.tag = tag;
					}
					var lastCount = uniqueTags[tag];
				}

				// return tag with the highest primacy
				return primary.tag;
			}

			//
			google.load("jquery", "1.2.6");
			google.setOnLoadCallback(function(){
				$("div.machine-tags").each(function(i) {
					$("h1", this).text("Primary: " + calculatePrimary($("p", this)));
				});
			});
		</script>
	</head>
	<body>
		<div class="machine-tags">
			<h1>Primary:</h1>
			<p>Jan/05</p>
			<p>Feb/06</p>
			<p>Feb/06</p>
			<p>Mar/08</p>
			<p>Mar/08</p>
			<p>Feb/06</p>
		</div>
		<div class="machine-tags">
			<h1>Primary:</h1>
			<p>Jan/06</p>
			<p>Feb/07</p>
			<p>Mar/08</p>
		</div>
		<div class="machine-tags">
			<h1>Primary:</h1>
			<p>Jan/05</p>
			<p>Feb/06</p>
			<p>Feb/06</p>
			<p>Mar/08</p>
			<p>Mar/08</p>
		</div>
	</body>
</html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
	<html lang="en">
	<head>
	<meta http-equiv="content-type" content="text/html; charset=UTF-8">
	<title>Test primacy</title>
	<meta http-equiv="keywords" content="">
	<meta http-equiv="description" content="">
	<style type="text/css" media="screen">
	body {
	padding: 20px;
	font-family: georgia, times, sans-serif;
	letter-spacing: -0.01em;
	line-height: 1.4;
	}

	h1,
	h2,
	p {
	font-weight: normal;
	margin: 0px 0px 4px 0px;
	}

	h1 {
	display: inline;
	border-bottom: 1px solid #cee;
	margin: 0px 0px 8px 0px;
	}

	div.machine-tags {
	width: 200px;
	padding: 10px;
	float: left;
	margin: 20px 60px 0px 0px;
	}
	</style>
	<script type="text/javascript" src="http://www.google.com/jsapi"></script>
	<script type="text/javascript">

	calculatePrimary = function(tags) {
	var uniqueTags = new Array();
	var tagsAsText = new Array();
	// extract text from jquery objects
	tags.each(function(i) {
	tagsAsText.push($(tags[i]).text());
	});

	//tagsAsText = tags.map(function(tag) { $(tags[tag]).text(); });

	// switch keys/values to create a faked unique array
	for (tag in tagsAsText) uniqueTags[tagsAsText[tag]] = tag;
	// you need to sort the array to ensure all common occurences appear next to each other
	uniqueTags.sort();
	// create storage variable
	var primary = { tag: null, count: 0 }
	// store
	var lastCount = 0;
	// use gaps in array to calculate tag with the highest primacy
	for (tag in uniqueTags) {
	// gap equals current index minus last index
	var arrCountGap = uniqueTags[tag] - lastCount;
	// if gap is higher than or equal to the last, overwrite primary storage
	if(arrCountGap >= primary.count) {
	primary.count = arrCountGap;
	primary.tag = tag;
	}
	var lastCount = uniqueTags[tag];
	}

	// return tag with the highest primacy
	return primary.tag;
	}

	//
	google.load("jquery", "1.2.6");
	google.setOnLoadCallback(function(){
	$("div.machine-tags").each(function(i) {
	$("h1", this).text("Primary: " + calculatePrimary($("p", this)));
	});
	});
	</script>
	</head>
	<body>
	<div class="machine-tags">
	<h1>Primary:</h1>
	<p>Jan/05</p>
	<p>Feb/06</p>
	<p>Feb/06</p>
	<p>Mar/08</p>
	<p>Mar/08</p>
	<p>Feb/06</p>
	</div>
	<div class="machine-tags">
	<h1>Primary:</h1>
	<p>Jan/06</p>
	<p>Feb/07</p>
	<p>Mar/08</p>
	</div>
	<div class="machine-tags">
	<h1>Primary:</h1>
	<p>Jan/05</p>
	<p>Feb/06</p>
	<p>Feb/06</p>
	<p>Mar/08</p>
	<p>Mar/08</p>
	</div>
	</body>
	</html>