[Rails] Re: using a paginate method to display the second group of 25 records on page 2

John Merlino wrote in post #989291:
>
> ((@all_resources.size - 1) / @limit).to_i + 1
>
> What does the size method do and why add one at the end?
>

Suppose 100 records, with a page size of 30

num_pages = ((100-1)/30)
num_pages = 99/30
num_pages = 3.3
num_pages = 3 (to_i)
num_pages = 4

3 full pages of 30 records, and 1 page with 9 records

Suppose 90 records...
((90-1)/30).to_i + 1 = 3, 3 full pages

It's just some math hijinks to make sure any partial page isn't missed
in the page count.

The slice(offset,limit) is the elegant part. Start at the "offset", and
return "limit" items.

On page 2, the offset is 1*25, skipping the records that would be
returned on page 1, and returns the next page's records.

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