web servers
response status code
同源策略
Cross-Origin Resource Sharing (CORS)
streams
比如 使用 node 读取 .csv 文件
const parse = require('csv-parse');
const fs = require('fs');
const results = []
// 宜居星球 条件
function isHabitablePlanet(planet){
return planet['koi_disposition'] === 'CONFIRMED'
&& planet['koi_insol'] > 0.36 && planet['koi_insol'] < 1.11
&& planet['koi_prad'] < 1.6
}
fs.createReadStream('kepler_data.csv')
.pipe(parse.parse({
comment:'#',
columns: true
}))
.on('data', (data) => {
if(isHabitablePlanet(data)){
results.push(data);
}
})
.on('error', err => {
console.error(err);
})
.on('end', () => {
console.log(results.map((planet) => {
return planet['kepler_name']
}));
console.log(`${results.length} habitable planets found!`);
})
