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d3 min, max, extent, sort
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<!DOCTYPE html> | |
<html> | |
<head> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.3/d3.min.js"></script> | |
<script src="https://cdn.jsdelivr.net/lodash/4/lodash.min.js"></script> | |
<meta charset="utf-8"> | |
<title>d3 min, max, extent, sort</title> | |
</head> | |
<body> | |
<script> | |
var d1 = [10,5,20,30]; | |
var d2 = [ | |
{"id":"1", "value":10}, | |
{"id":"2", "value":5}, | |
{"id":"3", "value":20}, | |
{"id":"4", "value":30} | |
]; | |
console.log("min = " + d3.min(d1)); | |
console.log("max = " + d3.max(d1)); | |
console.log("extent = " + d3.extent(d1)); | |
console.log("sort = " + d1.sort(d3.ascending)); | |
// | |
// buscando el maximo, sobre d2 | |
// 4 metodos | |
// | |
console.log(Math.max.apply(Math, d2.map(function(d){return d.value;}))); | |
let max = 0; | |
for(let i = 0; i < d2.length; i++) { | |
if(d2[i].value > max) { | |
max = d2[i].value; | |
} | |
} | |
console.log(max) | |
// usando d3 | |
console.log( d3.max(d2.map(function(d){return d.value;})) ); | |
// usando _ (lodash) | |
console.log(_.maxBy(d2, 'value').value) | |
</script> | |
</body> | |
</html> |
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