JAVASCRIPT

Mapping page number to index

// assuming we are on page one
const page = 1;
const contentPerPage = 3
const lastIndex = page * contentPerPage // 3
const firstIndex = lastIndex - contentPerPage // 0

scouts.slice(firstIndex, lastIndex)
// scouts.slice(0, 3) => [ 'levi', 'hange', 'erwin' ]

// page 2
// scouts.slice(3, 6) => [ 'petra', 'oruo', 'miche' ]