code rẻ tiền

cheap_code.js

function comparer(otherArray) {
  return function(current){
    return otherArray.filter(function(other){
      return other.id == current.id && other.symbol == current.symbol && other.name == current.name
    }).length == 0;
  }
}

let origirnalList = [];
setInterval(()=> {
  axios.get('https://api.coingecko.com/api/v3/coins/list')
    .then((response) => {
      let newList = response.data;
      if (origirnalList.length) {
        let diffNewOnOrigirnalList = newList.filter(comparer(origirnalList));
        if (diffNewOnOrigirnalList.length > 0) {
          diffNewOnOrigirnalList.forEach(item => {
            bot.sendMessage(chanelId, JSON.stringify(item));
          });
        }
      }
      origirnalList = newList;
    });
}, 5000);