# Cross reference from iterarors/itertools to iterors

If you are coming from packages iterators/itertools/itertools2, all functionality should be preserved, but some may be under different names. Here’s a short transition guide:

iterators/itertools | iteror function |  |  |
--- | --- | --- | --- | ---
`iterators::iapply(array, margin)` | `iteror``(array, by=margin)` |  |  |
`iterators::recycle` | `i_recycle` |  |  |
`itertools::ifilter(pred, iterable)` | `i_keep``(iterable, pred)` |  |  |
`itertools::ifilterfalse(pred, iterable)` | `i_drop``(iterable, pred)` |  |  |
`itertools::isplitCols(obj, ...)` | `iteror.array``(obj, by="column", ...)` |  |  |
`itertools::isplitIndices(n, ...)` | `icount``(n, ...)` |  |  |
`itertools::isplitRows(obj, ...)` | `iteror.array``(obj, by="row", ...)` |  |  |
`itertools::isplitVector(n, )` | `iteror.default``(n, ...)` |  |  |
`itertools::product` | `igrid` |  |  |
`itertools::recycle(iter)` | `i_recycle``(iter)` |  |  |
`itertools::recycle(function() {...}, times=N)` | `iteror``(function() {...}, count=N)` |  |  |
`itertools::timeout(secs)` | `i_timeout``(secs)` |  |  |
`itertools2::icompress` | `i_mask` |  |  |
`itertools2::icount(start=1, step=3, stop=15)` | `iseq``(from=1, to=15, by=3)` |  |  |
`itertools2::icycle` | `i_recycle` |  |  |
`itertools2::idropwhile(pred, iterable)` | `i_dropwhile``(iterable, pred)` |  |  |
`itertools2::ifilter(pred, iterable)` | `i_keep``(iterable, pred)` |  |  |
`itertools2::ifilterfalse(pred, iterable)` | `i_drop``(iterable, pred)` |  |  |
`itertools2::ilength` | `count``(obj)` |  |  |
`itertools2::imap(f, it)` | `i_apply``(it, f)` or `i_map``(f, it1, it2, ...)` |  |  |
`itertools2::ipairwise(it)` | `i_window``(it, 2)` |  |  |
`itertools2::iproduct` | `igrid` |  |  |
`itertools2::irep_len` | `i_rep``(length.out=n)` |  |  |
`itertools2::iseq_len` | `icount` |  |  |
`itertools2::iseq_along(x)` | `icount``(length(x))` |  |  |
`itertools2::itakewhile(pred, iterable)` | `i_keepwhile``(iterable, pred)` |  |  |
`itertools2::itripletwise(it)` | `i_window``(it, 3)` |  |  |
`itertools2::iunique_lastseen()` | `idedup``()` |  |  |

Other notes:

- `checkFunc` arguments have been removed; instead use `i_keep``()`.