[英]Scraping the nth element of a table using cheerio?
i want to scrape the wind column of this table https://www.bmreports.com/bmrs/?q=generation%2Ffueltype&fbclid=IwAR2p2a84CaJhgzF-YOU4MzOS-cMuZUpeDmLHFkWZU7-NauRHrA1owwdsMog i can scrape the whole table, but i don't know how to sort it.我想刮这张桌子的风柱https://www.bmreports.com/bmrs/?q=generation%2Ffueltype&fbclid=IwAR2p2a84CaJhgzF-YOU4MzOS-cMuZUpeDmLHFkWZU7-NauRHrA1owwdsMog我知道怎么刮整个桌子对其进行排序。 Ideally i would just scrape the one column.
理想情况下,我只会刮掉一列。
const request = require('request');
const cheerio = require('cheerio');
request('https://www.bmreports.com/bmrs/?q=generation%2Ffueltype&fbclid=IwAR2p2a84CaJhgzF-YOU4MzOS-cMuZUpeDmLHFkWZU7-NauRHrA1owwdsMog', (error, response, html) =>
{
if (!error && response.statusCode == 200)
{
const $ = cheerio.load(html);
const table = $('.gen-fuel');
var newArray = [];
var windArray = [];
// console.log(table.html());
$('td').each((i, el) =>
{
const item = $(el).html();
newArray.push(item);
console.log(item)
});
const every7thValue = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1);
console.log(every7thValue(newArray, 7));
//console.log(newArray);
}
});
How about something like像这样的东西怎么样
const request = require('request');
const cheerio = require('cheerio');
request(
'https://www.bmreports.com/bmrs/?q=generation%2Ffueltype&fbclid=IwAR2p2a84CaJhgzF-YOU4MzOS-cMuZUpeDmLHFkWZU7-NauRHrA1owwdsMog',
(error, response, html) => {
if (!error && response.statusCode == 200) {
const $ = cheerio.load(html);
const winds = $('.gen-fuel tbody td:nth-child(8)')
.map(function () {
return $(this).text();
})
.get();
console.log(winds);
}
}
);
Cheerio supports CSS selectors, with its power you have got array with all values from wind column Cheerio 支持 CSS 选择器,凭借其强大的功能,您可以获得包含来自风列的所有值的数组
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