Matt Lane mmmaaatttttt

## callbacks_and_array_methods.js
// map examples
[1, 2, 3, 4].map(function(num) {
  return 2 * num;
});

[1, 2, 3, 4].map(function(num) {
  if (num % 2 === 0) return "even";
  else return "odd";
});

## congressional_election_results_1996_2016.csv

          
            Year
            State
            District
            Republican
            Democrat

            
              2016
              Alabama
              1
              208083
              96820*

            
              2016
              Alabama
              2
              134886
              112089

            
              2016
              Alabama
              3
              192164
              94549

            
              2016
              Alabama
              4
              235925
              82611*

            
              2016
              Alabama
              5
              205647
              102234

            
              2016
              Alabama
              6
              245313
              83709

            
              2016
              Alabama
              7
              117793*
              229330

            
              2016
              Alabama
              Senate
              1335104
              748709

            
              2016
              Alabama
              President
              1318225
              729547

## app.js
d3.json("./sf_zips.json", function(err, data) {

  // data - TOPOJSON
  // mapData - GEOJSON

  var width = 600;
  var height = 600;
  var svg = d3.select('svg')
                .attr('width', width)
                .attr('height', height);
	// map examples
	[1, 2, 3, 4].map(function(num) {
	return 2 * num;
	});

	[1, 2, 3, 4].map(function(num) {
	if (num % 2 === 0) return "even";
	else return "odd";
	});
Year	State	District	Republican	Democrat
2016	Alabama	1	208083	96820*
2016	Alabama	2	134886	112089
2016	Alabama	3	192164	94549
2016	Alabama	4	235925	82611*
2016	Alabama	5	205647	102234
2016	Alabama	6	245313	83709
2016	Alabama	7	117793*	229330
2016	Alabama	Senate	1335104	748709
2016	Alabama	President	1318225	729547
	d3.json("./sf_zips.json", function(err, data) {

	// data - TOPOJSON
	// mapData - GEOJSON

	var width = 600;
	var height = 600;
	var svg = d3.select('svg')
	.attr('width', width)
	.attr('height', height);