如何将我的数组分成 discord.js 中的一些部分?

How to separate my array into some parts in discord.js?

我在嵌入中进行分页,我想为每个页面从一个数组中拆分 4 个元素。我该怎么做呢? (当我点击按钮时更新)。在那之前,我只有第一步,即从第一页获取前 4 个元素,其中:

.slice(0, 4)

如何获得下一个,下一个,等等...

您需要定义:

  • currentPage 变量(设置为默认值 1)
  • pageSize - 一页应该有多少项目
  • countPages - 用于计算,在大边四舍五入

我写了3个方法

  • loadFirstPage()
  • loadNextPage()
  • loadPrevPage()

const input = [1,2,3,4,5,6,7,8,9,10,11,12,13];
let currentPage = 1;
let pageSize = 4;
const countPages = Math.ceil(input.length / pageSize);


function loadFirstPage() {
    currentPage = 1;
    return [...input].splice(0, pageSize)
}

function loadNextPage() {
    const nextPage = currentPage + 1;
    if (nextPage <= countPages) {
        currentPage = nextPage;
        const startIndex = currentPage * pageSize - pageSize;
        return [...input].splice(startIndex, pageSize)
    } else {
        currentPage = countPages;
        const startIndex = currentPage * pageSize - pageSize;
        return [...input].splice(startIndex, pageSize)
    }
}

function loadPrevPage() {
    const prevPage = currentPage - 1;
    if (prevPage >= 1) {
        currentPage = prevPage;
        const startIndex = currentPage * pageSize - pageSize;
        return [...input].splice(startIndex, pageSize)
    } else {
        currentPage = 1;
        const startIndex = currentPage * pageSize - pageSize;
        return [...input].splice(startIndex, pageSize)
    }
}

console.log('output data: ', loadFirstPage(), 'current page: ', currentPage);

console.log('output data: ', loadNextPage(), 'current page: ', currentPage);
console.log('output data: ', loadNextPage(), 'current page: ', currentPage);
console.log('output data: ', loadNextPage(), 'current page: ', currentPage);
console.log('output data: ', loadNextPage(), 'current page: ', currentPage);

console.log('output data: ', loadPrevPage(), 'current page: ', currentPage);
console.log('output data: ', loadPrevPage(), 'current page: ', currentPage);
console.log('output data: ', loadPrevPage(), 'current page: ', currentPage);
console.log('output data: ', loadPrevPage(), 'current page: ', currentPage);