Life expectancy at birth - Module 4 exercise

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Module 4 Exercise -- Life Expectancy for all the countries.</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
		<style type="text/css">
			
			body {
				background-color: white;
				font-family: Roboto, Helvetica, Arial, sans-serif;
			}

h1 {
				font-size: 24px;
				margin: 0;
			}

p {
				font-size: 14px;
				margin: 5px 0 0 0;
			}

svg {
				background-color: white;
			}

rect:hover {
				fill: green;
			}
			
			.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: Roboto;
				font-size: 11px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
	</head>
	<body>

<h1>Life expectancy at birth in years</h1>
		<p>Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life.</p>
		<p>Source: <a href="https://data.worldbank.org/indicator/SP.DYN.LE00.IN/countries/">World Bank</a>, 2014</p>

var w = 700;
			var h = 600;
			var padding = [ 20, 10, 30, 160 ];  //Top, right, bottom, left

var widthScale = d3.scale.linear()
								.range([ 0, w - padding[1] - padding[3] ]);
			
			var heightScale = d3.scale.ordinal()
								.rangeRoundBands([ padding[0], h - padding[2] ], 0.2);

var xAxis = d3.svg.axis()
							.scale(widthScale)
							.orient("bottom");

var yAxis = d3.svg.axis()
							.scale(heightScale)
							.orient("left");

var svg = d3.select("body")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

function randomIntForPickingData(min, max) {
				return Math.floor(Math.random() * (max - min + 1) + min);
			}

var normalFillColor = "#BCF5A9";
			var clickFillColor = "#FF6600";
			var changeColorOnClick = (function(){
				var currentColor = normalFillColor;

return function(){
					console.log(currentColor);
					currentColor = currentColor == normalFillColor ? clickFillColor : normalFillColor;
					console.log(currentColor);
					d3.select(this).style("fill", currentColor);
				}
			})();

d3.csv("LifeExpectancyAtBirth.csv", function(data) {
				/*data.forEach(function(d) {
					console.log(d.CountryName);
				});*/

console.time("data-transformation");
				data.sort(function(a, b) {
					return d3.descending(+a["2012"], +b["2012"]);
				});

var dataSubset = [];
				var j = 0;
				//As our data is huge [~200 rows], we will only use a subset of the data and for even distribution, we will select one row every n-random-rows to get 30 to 40 rows for the chart; beyond these number of rows, display gets rather too absurd.
				var randomInt = randomIntForPickingData(5, 8);
				for(i = 0; i < data.length; i += randomInt) {
					dataSubset[j] = data[i];
					j++;
				}
				data = dataSubset;

widthScale.domain([ 0, d3.max(data, function(d) {
					return +d["2012"];
				}) ]);

heightScale.domain(data.map(function(d) { 
					return d.CountryName; 
				} ));
				console.timeEnd("data-transformation");

console.time("barchart");
				var rects = svg.selectAll("barchart")
								.data(data)
								.enter()
								.append("rect");

rects.attr("x", padding[3])
					.attr("y", function(d) {
						return heightScale(d.CountryName);
					})
					.attr("width", function(d) {
						return widthScale(d["2012"]);
					})
					.attr("height", heightScale.rangeBand())
					.attr("fill", normalFillColor)
					//.on("click", changeColorOnClick)
					.append("title")
					.text(function(d) {
						return d.CountryName + "'s life expectancy at birth is " + d["2012"] + " years.";
					});
				console.timeEnd("barchart");

//To display data values on the bar itself; but at the extreme right end of the bar.
				console.time("data-values");
				svg.selectAll("data-values")
				   .data(data)
				   .enter()
				   .append("text")
				   .text(function(d, i) {
						return d["2012"];
				   })
				   .attr("text-anchor", "middle")
				   .attr("x", function(d, i) {
						return widthScale(d["2012"]) + 4.85 * padding[2];
				   })
				   .attr("y", function(d, i) {
						return heightScale(d.CountryName) + 10;
				   })
				   .attr("fill", "black")
				   .attr("font-size", "10px")
				   .attr("font-family", "roboto");
				console.timeEnd("data-values");

console.time("axes");
				svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
					.call(xAxis);

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + padding[3] + ",0)")
					.call(yAxis);
				console.timeEnd("axes");
			});

</script>
	</body>
</html>

Modified http://d3js.org/d3.v3.js to a secure url

https://d3js.org/d3.v3.js