yesoreyeram/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    This example demonstrates using the Fetch API and Promises, in conjunction with d3-dsv, to load a few CSV files in parallel. Compare this to using d3-queue, which also allows configurable concurrency.
forked from mbostock's block: Fetching CSV

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

h1 {
  text-align: center;
  font-family: "Helvetica Neue";
  font-size: 96px;
  line-height: 350px;
}

</style>
<h1>1 + 2 + 3 = <span id="result">?</span></h1>
<script src="https://d3js.org/d3-dsv.v0.3.min.js"></script>
<script>

Promise.all([
  "one.csv",
  "two.csv",
  "three.csv"
].map(function(url) {
  return fetch(url).then(function(response) {
    return response.ok ? response.text() : Promise.reject(response.status);
  }).then(function(text) {
    return d3_dsv.csvParse(text);
  });
})).then(function(value) {
  var one = +value[0][0].number,
      two = +value[1][0].number,
      three = +value[2][0].number;
  document.querySelector("#result").textContent = one + two + three;
});

</script>

## one.csv
number
1

## three.csv
number
3

## two.csv
number
2
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	h1 {
	text-align: center;
	font-family: "Helvetica Neue";
	font-size: 96px;
	line-height: 350px;
	}

	</style>
	<h1>1 + 2 + 3 = <span id="result">?</span></h1>
	<script src="https://d3js.org/d3-dsv.v0.3.min.js"></script>
	<script>

	Promise.all([
	"one.csv",
	"two.csv",
	"three.csv"
	].map(function(url) {
	return fetch(url).then(function(response) {
	return response.ok ? response.text() : Promise.reject(response.status);
	}).then(function(text) {
	return d3_dsv.csvParse(text);
	});
	})).then(function(value) {
	var one = +value[0][0].number,
	two = +value[1][0].number,
	three = +value[2][0].number;
	document.querySelector("#result").textContent = one + two + three;
	});

	</script>