logical-and · December 19, 2015 11:29
diff --git a/2nd task.html b/2nd task.html
 <!doctype html>
 <html lang="en-US">
 <head>
 	<meta charset="UTF-8">
 	<script src="//ajax.googleapis.com/ajax/libs/mootools/1.4.5/mootools-yui-compressed.js"></script>
 </head>
 <body>
 <script type="text/javascript">
 	console.log((function (servers, neededServers, neededClusters, performanceDegradation) {
 		var defaultServerStringSeparator = "\n",
 			defaultPerformanceDegradation = performanceDegradation || .3;

 		function fetchServersString(servers, separator) {
 			if (! separator) separator = defaultServerStringSeparator;

 			return servers
 				.split(separator)
 				.filter(function (v) { return ! ! v; })
 				.map(function (v) {
 					var split = v.split(';');
 					return {
 						address    : split[0],
 						distance   : parseFloat(split[1]),
 						performance: parseFloat(split[2])
 					};
 				});
 		}

 		function serversPerformance(servers, degradation) {
 			if (undefined === degradation) degradation = defaultPerformanceDegradation;
 			var performance = 0, distance = 0;

 			servers.each(function (server, i) {
 				performance += server.performance;
 				if (i) distance += server.distance; // don't calculate first element
 			});

 			// Fix a performance with performance degradation
 			performance -= distance * degradation;

 			return performance;
 		}

 		// Workhorse
 		function getClusters(serversInClusters, clusterCount) {
 			var clusters = [],
 				actualServers = Array.clone(servers); // to prevent modify of original servers array

 			for (var c = 0; c < clusterCount; c ++) {
 				var cluster = [];
 				for (var s = 0; s < serversInClusters; s ++) {
 					if (! actualServers.length) throw new Error('No servers left, needed servers (in each cluster): ' +
 						serversInClusters + ', clusters: ' + clusterCount + ', builded clusters: ', clusters);

 					cluster.push(actualServers[0]);
 					actualServers.shift(); // remove first [0] element
 				}
 				clusters.push(cluster);
 			}

 			return clusters;
 		}

 		function sortClustersByPerformance(clusters) {
 			if (clusters.length < 2) return clusters; // we don't need any type of sorting on this

 			// Sort it as required
 			return clusters.sort(function (cluster1, cluster2) {
 				return serversPerformance(cluster2) - serversPerformance(cluster1);
 			});
 		}

 		function clustersToString(clusters) {
 			var str = [];

 			clusters.each(function (cluster) {
 				var clstr = [];
 				cluster.each(function (server) {
 					clstr.push([server.address].join(';'));
 				});
 				str.push(clstr.join(';') + ' (мощность кластера: ' + serversPerformance(cluster) + ')');
 			});

 			return str.join(defaultServerStringSeparator);
 		}

 		servers = fetchServersString(servers);

 		return clustersToString(sortClustersByPerformance(getClusters(neededServers, neededClusters)))
 	})(
 			"192.168.0.1;0;3\n" +
 				"192.168.0.2;0.5;5\n" +
 				"192.168.0.3;10;5\n" +
 				"192.168.0.4;10;3\n",
 				2,
 				2
 		));
 </script>
 </body>
 </html>
	<!doctype html>
	<html lang="en-US">
	<head>
	<meta charset="UTF-8">
	<script src="//ajax.googleapis.com/ajax/libs/mootools/1.4.5/mootools-yui-compressed.js"></script>
	</head>
	<body>
	<script type="text/javascript">
	console.log((function (servers, neededServers, neededClusters, performanceDegradation) {
	var defaultServerStringSeparator = "\n",
	defaultPerformanceDegradation = performanceDegradation \|\| .3;

	function fetchServersString(servers, separator) {
	if (! separator) separator = defaultServerStringSeparator;

	return servers
	.split(separator)
	.filter(function (v) { return ! ! v; })
	.map(function (v) {
	var split = v.split(';');
	return {
	address : split[0],
	distance : parseFloat(split[1]),
	performance: parseFloat(split[2])
	};
	});
	}

	function serversPerformance(servers, degradation) {
	if (undefined === degradation) degradation = defaultPerformanceDegradation;
	var performance = 0, distance = 0;

	servers.each(function (server, i) {
	performance += server.performance;
	if (i) distance += server.distance; // don't calculate first element
	});

	// Fix a performance with performance degradation
	performance -= distance * degradation;

	return performance;
	}

	// Workhorse
	function getClusters(serversInClusters, clusterCount) {
	var clusters = [],
	actualServers = Array.clone(servers); // to prevent modify of original servers array

	for (var c = 0; c < clusterCount; c ++) {
	var cluster = [];
	for (var s = 0; s < serversInClusters; s ++) {
	if (! actualServers.length) throw new Error('No servers left, needed servers (in each cluster): ' +
	serversInClusters + ', clusters: ' + clusterCount + ', builded clusters: ', clusters);

	cluster.push(actualServers[0]);
	actualServers.shift(); // remove first [0] element
	}
	clusters.push(cluster);
	}

	return clusters;
	}

	function sortClustersByPerformance(clusters) {
	if (clusters.length < 2) return clusters; // we don't need any type of sorting on this

	// Sort it as required
	return clusters.sort(function (cluster1, cluster2) {
	return serversPerformance(cluster2) - serversPerformance(cluster1);
	});
	}

	function clustersToString(clusters) {
	var str = [];

	clusters.each(function (cluster) {
	var clstr = [];
	cluster.each(function (server) {
	clstr.push([server.address].join(';'));
	});
	str.push(clstr.join(';') + ' (мощность кластера: ' + serversPerformance(cluster) + ')');
	});

	return str.join(defaultServerStringSeparator);
	}

	servers = fetchServersString(servers);

	return clustersToString(sortClustersByPerformance(getClusters(neededServers, neededClusters)))
	})(
	"192.168.0.1;0;3\n" +
	"192.168.0.2;0.5;5\n" +
	"192.168.0.3;10;5\n" +
	"192.168.0.4;10;3\n",
	2,
	2
	));
	</script>
	</body>
	</html>