skokenes/d3formatting.css

## d3formatting.css
body {
	margin: 20px 0px 0px 50px;
}

.formattext {
	text-align: right;
}

.formatresult {
	text-align: left;
	padding-left: 40px;
}

## formatting.js
// define variables
var formatlist = ["", "s", ",%", "+,%", ",.1%", ".4r", ".4f", ".4n", ".3n", ",d", ",.0f", ".0f", ".0e", ".1e"];
var userNum = document.getElementById("userNum");
var colorLow = 'blue'
var colorHigh = 'red'

// add listener to call formatter function when user changes the number
userNum.addEventListener("input",
	function(e) {
		myFormats.changeNumber(userNum.value);
	},
	false
);

// need way to update list
formatSpecifier.addEventListener("change",
	function(e) {
		myFormats.addToList(formatSpecifier.value);
	},
	false
);

// create a little color scale function to make the output look pretty
function setColorScale(max) {
	return d3.scale.linear()
		.domain([0, max])
		.interpolate(d3.interpolateRgb)
		.range([colorLow, colorHigh])
}

// construct code/text pairs from list of formats I could use
var constructFormatObject = function(mylist) {
	var types = [];
	mylist.forEach(function(d) {
		types.push({
			code: d3.format(d),
			text: 'd3.format("' + d + '")'
		})
	})
	return types
}


var myFormats = new ShowFormats(
	formatlist,
	0);

## index.html
<!doctype html>

<html lang="en">
<head>
  <meta charset="utf-8">

  <title>Formatting Example</title>
  <link rel="stylesheet" href="d3formatting.css">

</head>
<body>
  <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
  This little tool helps you try out d3.format specifiers on different numbers.<br>
  Documentation for format specifiers is <a href="https://github.com/mbostock/d3/wiki/Formatting">here</a>.
  <br><br>
  Enter a number:<br>
  <input id="userNum" type="string"><br><br>
  Add your own format specifier (ex: .4n):<br>
  <input id="formatSpecifier" type="string"><br>
	<table style="padding-top: 20px;"><thead>
  	<tr>
    	<th class="formattext">format specifier</th>
    	<th class="formatresult">resulting formatted number</th>
  	</tr>
  	</thead>
  	<tbody>
    </tbody>
    </table>
  <script src="showFormatsConstructor.js"></script>
  <script src="formatting.js"></script>
</body>
</html>

## showFormatsConstructor.js
// set up showformats constructor

ShowFormats = function(formatList, number) {
	// list of format specifiers to show
	this.formatList = formatList;
	this.formatObject = constructFormatObject(formatList);
	this.dataset = Array.apply(0,
		Array(this.formatObject.length)).map(function(x, y) {
		return y;
	});;
	// number to format
	this.number = number;
	this.colorScale = setColorScale(this.dataset.length)

	var self = this;

	// set up defaults
	this.selection = d3.select("tbody").selectAll("tr")
		.data(this.dataset)
		.enter()
		.append("tr");

	this.selection
		.append("td")
		.text(function(d) {
			return self.formatObject[d].text;
		})
		.style("color", function(d) {
			return self.colorScale(d)
		})
		.attr("class", "formattext");

	this.selection
		.append("td")
		.text(function(d) {
			return self.formatObject[d].code(self.number);
		})
		.style("color", function(d) {
			return self.colorScale(d)
		})
		.attr("class", "formatresult");
}

ShowFormats.prototype.changeNumber = function(number) {
	this.number = number;
	this.updateFormats();
}

ShowFormats.prototype.addToList = function(specifier) {
	this.formatList.unshift(specifier)
	this.formatObject = constructFormatObject(this.formatList);

	// update dataset array w/ new length
	this.dataset = Array.apply(0,
		Array(this.formatObject.length)).map(function(x, y) {
		return y;
	});;

	this.updateFormats();
}

ShowFormats.prototype.tdtextStyling = function(selection) {
	selection.text(function(d) {
		return self.formatObject[d].text;
	})
		.style("color", function(d) {
			return self.colorScale(d)
		})
		.attr("class", "formattext");
}

ShowFormats.prototype.tdcodeStyling = function(selection) {
	selection.text(function(d) {
		return self.formatObject[d].code(self.number);
	})
		.style("color", function(d) {
			return self.colorScale(d)
		})
		.attr("class", "formatresult");

}

ShowFormats.prototype.updateFormats = function() {
	self = this;

	// bind with current dataset
	this.selection = d3.selectAll("tbody").selectAll("tr")
		.data(self.dataset);

	// enter elements
	var k = this.selection.enter().append("tr")

	k.append("td")
		.call(self.tdtextStyling);

	k.append("td")
		.call(self.tdcodeStyling);

	// update elements
	this.selection
		.selectAll("td")
		.text(function(d, i) {
			if (i == 0) {
				return self.formatObject[d].text;
			}
			if (i == 1) {
				return self.formatObject[d].code(self.number);
			}
		})
		.style("color", function(d) {
			return self.colorScale(d)
		})
		.attr("class", function(d, i) {
			if (i == 0) {
				return "formattext"
			} else {
				return "formatresult"
			}
		})
}

## thumbnail.png

      
    Raw
  

              thumbnail.png
	body {
	margin: 20px 0px 0px 50px;
	}

	.formattext {
	text-align: right;
	}

	.formatresult {
	text-align: left;
	padding-left: 40px;
	}
	// define variables
	var formatlist = ["", "s", ",%", "+,%", ",.1%", ".4r", ".4f", ".4n", ".3n", ",d", ",.0f", ".0f", ".0e", ".1e"];
	var userNum = document.getElementById("userNum");
	var colorLow = 'blue'
	var colorHigh = 'red'

	// add listener to call formatter function when user changes the number
	userNum.addEventListener("input",
	function(e) {
	myFormats.changeNumber(userNum.value);
	},
	false
	);

	// need way to update list
	formatSpecifier.addEventListener("change",
	function(e) {
	myFormats.addToList(formatSpecifier.value);
	},
	false
	);

	// create a little color scale function to make the output look pretty
	function setColorScale(max) {
	return d3.scale.linear()
	.domain([0, max])
	.interpolate(d3.interpolateRgb)
	.range([colorLow, colorHigh])
	}

	// construct code/text pairs from list of formats I could use
	var constructFormatObject = function(mylist) {
	var types = [];
	mylist.forEach(function(d) {
	types.push({
	code: d3.format(d),
	text: 'd3.format("' + d + '")'
	})
	})
	return types
	}


	var myFormats = new ShowFormats(
	formatlist,
	0);
	<!doctype html>

	<html lang="en">
	<head>
	<meta charset="utf-8">

	<title>Formatting Example</title>
	<link rel="stylesheet" href="d3formatting.css">

	</head>
	<body>
	<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
	This little tool helps you try out d3.format specifiers on different numbers.<br>
	Documentation for format specifiers is <a href="https://github.com/mbostock/d3/wiki/Formatting">here</a>.
	<br><br>
	Enter a number:<br>
	<input id="userNum" type="string"><br><br>
	Add your own format specifier (ex: .4n):<br>
	<input id="formatSpecifier" type="string"><br>
	<table style="padding-top: 20px;"><thead>
	<tr>
	<th class="formattext">format specifier</th>
	<th class="formatresult">resulting formatted number</th>
	</tr>
	</thead>
	<tbody>
	</tbody>
	</table>
	<script src="showFormatsConstructor.js"></script>
	<script src="formatting.js"></script>
	</body>
	</html>
	// set up showformats constructor

	ShowFormats = function(formatList, number) {
	// list of format specifiers to show
	this.formatList = formatList;
	this.formatObject = constructFormatObject(formatList);
	this.dataset = Array.apply(0,
	Array(this.formatObject.length)).map(function(x, y) {
	return y;
	});;
	// number to format
	this.number = number;
	this.colorScale = setColorScale(this.dataset.length)

	var self = this;

	// set up defaults
	this.selection = d3.select("tbody").selectAll("tr")
	.data(this.dataset)
	.enter()
	.append("tr");

	this.selection
	.append("td")
	.text(function(d) {
	return self.formatObject[d].text;
	})
	.style("color", function(d) {
	return self.colorScale(d)
	})
	.attr("class", "formattext");

	this.selection
	.append("td")
	.text(function(d) {
	return self.formatObject[d].code(self.number);
	})
	.style("color", function(d) {
	return self.colorScale(d)
	})
	.attr("class", "formatresult");
	}

	ShowFormats.prototype.changeNumber = function(number) {
	this.number = number;
	this.updateFormats();
	}

	ShowFormats.prototype.addToList = function(specifier) {
	this.formatList.unshift(specifier)
	this.formatObject = constructFormatObject(this.formatList);

	// update dataset array w/ new length
	this.dataset = Array.apply(0,
	Array(this.formatObject.length)).map(function(x, y) {
	return y;
	});;

	this.updateFormats();
	}

	ShowFormats.prototype.tdtextStyling = function(selection) {
	selection.text(function(d) {
	return self.formatObject[d].text;
	})
	.style("color", function(d) {
	return self.colorScale(d)
	})
	.attr("class", "formattext");
	}

	ShowFormats.prototype.tdcodeStyling = function(selection) {
	selection.text(function(d) {
	return self.formatObject[d].code(self.number);
	})
	.style("color", function(d) {
	return self.colorScale(d)
	})
	.attr("class", "formatresult");

	}

	ShowFormats.prototype.updateFormats = function() {
	self = this;

	// bind with current dataset
	this.selection = d3.selectAll("tbody").selectAll("tr")
	.data(self.dataset);

	// enter elements
	var k = this.selection.enter().append("tr")

	k.append("td")
	.call(self.tdtextStyling);

	k.append("td")
	.call(self.tdcodeStyling);

	// update elements
	this.selection
	.selectAll("td")
	.text(function(d, i) {
	if (i == 0) {
	return self.formatObject[d].text;
	}
	if (i == 1) {
	return self.formatObject[d].code(self.number);
	}
	})
	.style("color", function(d) {
	return self.colorScale(d)
	})
	.attr("class", function(d, i) {
	if (i == 0) {
	return "formattext"
	} else {
	return "formatresult"
	}
	})
	}