crespowang / -inquisitive-between

@inquisitive/between

This repo is simply a rewritten and an improvement of between in typescript. At Inquisitive we have been using between for many years, with @ts-ignore, which doesn't look good in a full type safe codebase. So we rewrote it in typescript, and made it safer, for example, when the high and low passed in are equal, it will throw error rather than dead loop.

How it works?

There is a sequence of items with sorting in place

A (sortValue: 'a')
B (sortValue: 'b')

Now we want to add a new item C to the list in between A and B, without updating the sortValue of A and B so the list becomes

A (sortValue: 'a')
C (sortValue: ?)
B (sortValue: 'b')

Using between('a','b') will return the string that sorts between a and b, which in this case is aV.