How to use

slice

function

in

Cheerio

/**
  * Scrapes summoner spells from a METAsrc page
  * @param {cheerio} $ - The cheerio object
  */
 scrapeSummonerSpells($) {
  let summonerSpells = [];

  $('img[src*="/img/spell"]').slice(0, 2).each(function(index) {
   const key = $(this).attr('src').slice($(this).attr('src').lastIndexOf('/') + 1, -4);

   if (Mana.gameClient.summonerSpells[key])
    summonerSpells.push(Mana.gameClient.summonerSpells[key]);
  });

  return summonerSpells;
 }

/**
  * Scrapes summoner spells from a OP.GG page
  * @param {cheerio} $ - The cheerio object
  * @param {string} gameMode - A gamemode, from League Client, such as CLASSIC, ARAM, etc.
  */
 scrapeSummonerSpells($, gameMode) {
  let summonerSpells = [];

  $("img[src^='//opgg-static.akamaized.net/images/lol/spell/Summoner']").slice(0, 2).each(function(index) {
   const summoner = Mana.gameClient.summonerSpells[$(this).attr('src').slice(45, -29)];

   if (!summoner) return;
   if (summoner.gameModes.includes(gameMode)) summonerSpells.push(summoner.id);
  });

  return summonerSpells;
 }

/**
  * Scrapes item sets from a OP.GG page
  * @param {cheerio} $ - The cheerio object
  * @param {object} champion - A champion object, from Mana.gameClient.champions
  */
 scrapePerks($, champion) {
  let pages = [{ selectedPerkIds: [] }, { selectedPerkIds: [] }];

  $('.perk-page').find('img.perk-page__image.tip').slice(0, 4).each(function(index) {
   const page = Math.trunc(index / 2);
   pages[page][index % 2 === 0 ? 'primaryStyleId' : 'subStyleId'] = parseInt($(this).attr('src').slice(-8, -4));
  });

  $('.perk-page__item--active').find('img').slice(0, 12).each(function(index) {
   pages[Math.trunc(index / 6)].selectedPerkIds.push(parseInt($(this).attr('src').slice(-8, -4)));
  });

  $('.fragment__summary').find('img').slice(0, 6).each(function(index) {
   pages[index > 2 ? 1 : 0].selectedPerkIds.push(parseInt($(this).attr('src').slice(-8, -4)));
  })

  return pages;
 }

/**
 * Get all the departments.
 *
 * @returns {Promise<Department[]>}
 */
async function getAllDepartments() {
 const html = await httpService.consultaHorarios();
 const $ = cheerio.load(html);

 return $('#departamento > option')
  .slice(1)
  .map((i, el) => {
   const parsedEl = $(el);

   return {
    code: parsedEl.val(),
    name: parsedEl.text()
   };
  })
  .get();
}

/**
  * Scrapes skill order from a Champion.gg page
  * @param {cheerio} $ - The cheerio object
  */
 scrapeSkillOrder($) {
  let skills = $('.skill').slice(1, -1);
  skills.splice(3, 2);

  let sums = [{ key: i18n.__('key-Q'), sum: 0 }, { key: i18n.__('key-W'), sum: 0 }, { key: i18n.__('key-E'), sum: 0 }];
  let skillorder = {};

  skills.each(function(index) {
   $(this).find('div').children().each(function(i) {
    if (!$(this).hasClass('selected')) return;
    sums[index % 3].sum += (18 - i);
   });

   if (index % 3 === 0) {
    sums = sums.sort((a, b) => b.sum - a.sum);
    skillorder[index === 0 ? 'mf' : 'hw%'] = `${sums[0].key} => ${sums[1].key} => ${sums[2].key}`;
    sums[0].sum = sums[1].sum = sums[2].sum = 0;
   }
  });

  return skillorder;
 }

itemrows.slice(0, 2).each(function(index) {
 let starter = new Block().setType({ i18n: 'item-sets-block-starter-skill-order-numbered', arguments: [index + 1, skillorder] });
 let pots = 0;
  const id = $(this).attr('src').slice(44, 48);
  items[id] = items[id] + 1 || 1;
 });
itemrows.slice(2, -3).find('li:not(.champion-stats__list__arrow) > img').each(function(index) {
 recommanded.addItem($(this).attr('src').slice(44, 48), false);
});
itemrows.slice(-3).find('img').each(function(index) {
 boots.addItem($(this).attr('src').slice(44, 48));
});

});
var items = [];
$('.olt tr').slice(1).each(function (index, el) {
 var title = $('.title > a', el).attr('title');
 if (checkIncludeWords(title, includeWords) && checkExcludeWords(title, excludeWords)) {

let $ = parser.load(html)
let trs = $('.tabproperty table tr').slice(2)

var $tr = $('.tabcontent').eq(2).find('tr').slice(1);
$tr.each(function(){
  records.push({

/**
  * Scrapes summoner spells from a OP.GG page
  * @param {cheerio} $ - The cheerio object
  * @param {string} gameMode - A gamemode, from League Client, such as CLASSIC, ARAM, etc.
  */
 scrapeSummonerSpells($, gameMode) {
  let summonerSpells = [];

  $("img[src^='//opgg-static.akamaized.net/images/lol/spell/Summoner']").slice(0, 2).each(function(index) {
   const summoner = Mana.gameClient.summonerSpells[$(this).attr('src').slice(45, -29)];

   if (!summoner) return;
   if (summoner.gameModes.includes(gameMode)) summonerSpells.push(summoner.id);
  });

  return summonerSpells;
 }

/**
 * Get all the levels.
 *
 * @returns {Promise<Level[]>}
 */
async function getAllLevels() {
 const html = await httpService.consultaHorarios();
 const $ = cheerio.load(html);

 return $('#nivel > option')
  .slice(1)
  .map((i, el) => {
   const parsedEl = $(el);

   return {
    code: parsedEl.val(),
    name: parsedEl.text()
   };
  })
  .get();
}

/**
 * Get all periods.
 *
 * @returns {Promise<Period[]>}
 */
async function getAllPeriods() {
 const html = await httpService.consultaHorarios();
 const $ = cheerio.load(html);

 return $('#periodo > option')
  .slice(1)
  .map((i, el) => {
   const parsedEl = $(el);

   return {
    code: parsedEl.val(),
    name: parsedEl.text()
   };
  })
  .get();
}

/**
  * Scrapes item sets from a OP.GG page
  * @param {cheerio} $ - The cheerio object
  * @param {object} champion - A champion object, from Mana.gameClient.champions
  * @param {string} position - Limited to: TOP, JUNGLE, MIDDLE, ADC, SUPPORT
  */
 scrapePerks($, champion, position) {
  let pages = [{ selectedPerkIds: [] }, { selectedPerkIds: [] }];

  $('.perk-page').find('img.perk-page__image.tip').slice(0, 4).each(function(index) {
   const page = Math.trunc(index / 2);
   pages[page][index % 2 === 0 ? 'primaryStyleId' : 'subStyleId'] = parseInt($(this).attr('src').slice(-8, -4));
  });

  $('.perk-page__item--active').find('img').slice(0, 12).each(function(index) {
   pages[Math.trunc(index / 6)].selectedPerkIds.push(parseInt($(this).attr('src').slice(-8, -4)));
  });

  $('.fragment__summary').find('img').slice(0, 6).each(function(index) {
   pages[index > 2 ? 1 : 0].selectedPerkIds.push(parseInt($(this).attr('src').slice(-8, -4)));
  })

  return pages;
 }

});
var items = [];
$('.olt tr').slice(1).each(function (index, el) {
 var title = $('.title > a', el).attr('title');
 if (checkIncludeWords(title, includeWords) && checkExcludeWords(title, excludeWords)) {

itemrows.slice(0, 2).each(function(index) {
 let starter = new Block().setType({ i18n: 'item-sets-block-starter-skill-order-numbered', arguments: [index + 1, skillorder] });
 let pots = 0;
  const id = $(this).attr('src').slice(44, 48);
  items[id] = items[id] + 1 || 1;
 });
itemrows.slice(2, -3).find('li:not(.champion-stats__list__arrow) > img').each(function(index) {
 recommanded.addItem($(this).attr('src').slice(44, 48), false);
});
itemrows.slice(-3).find('img').each(function(index) {
 boots.addItem($(this).attr('src').slice(44, 48));
});