var Papa = require('papaparse'); | |
var fs = require('fs'); | |
var res = Papa.parse(fs.readFileSync('./aqi.csv', 'utf-8')); | |
var arr = res.data.filter(function (item) { | |
return item[2] === '北京'; | |
}).map(function (item) { | |
return [item[5], +item[3]]; | |
}); | |
fs.writeFileSync('aqi-beijing.json', JSON.stringify(arr), 'utf-8'); |