Indexing an Array with Another Array

I'm working on a project where we have 2 arrays: one flattened matrix of values that representing a non-square (NxN) array, and one vector of start and end points. If we call these arrays `data` and `indices`, we could work with like `data[1:9]` then `data[10:15]`, so it is inconsistent.

We have a function that indexes the data array as `data[indices[1]:indices[2]]`, then `data[indices[2]:indices[3]]` and so on in a loop. This crashes, with the error
```ERROR: LoadError: TypeError: non-boolean (Reactant.TracedRNumber{Bool}) used in boolean context```

How would I go about achieving this goal in a Reactant friendly way?