Paginate Javascript array

问题:

I am trying to write a Javascript function that takes an array, page_size and page_number as parameters and returns an array that mimics paginated results:

paginate: function (array, page_size, page_number) {
  return result;
}

so for example when:

array = [1, 2, 3, 4, 5],
page size = 2,
page_number = 2,

the function should return: [3, 4].

Any ideas would be appreciated.

回答1:

You can use Array.prototype.slice and just supply the params for (start, end).

function paginate (array, page_size, page_number) {
  --page_number; // because pages logically start with 1, but technically with 0
  return array.slice(page_number * page_size, (page_number + 1) * page_size);
}

console.log(paginate([1, 2, 3, 4, 5, 6], 2, 2));
console.log(paginate([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], 4, 1));