Cumulative map
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Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 35/100
Research direction
Start by reviewing ndarray's existing map, mapv, map_inplace, and map_into entry points, along with any cumulative operation APIs. Determine whether cumulative mapped variants should be added and how the proposed cumsum-style example fits the public API; done means an agreed design and corresponding implementation scope.
Written by the indexing model from the issue text.
Description
Like numpy.cumsum() or numpy.cumprod() but with map, mapv, map_inplace, map_into since unlike Numpy, in Rust we don't take a performance hit by supplying user functions. I imagine the signature to be something like
fn cum_mapv<F: Fn(T,T) -> T>(&self<T>, f: F) -> Self// T being the element type
// cumsum example:
let a = Array::linspace(0., 100., 100).cummapv(|acc, cur| acc + cur);
If this will be considered for inclusion, I can write up a PR!
- Dominant language
- Rust
- Stars
- 4.3k
- Forks
- 391
- PR merge metrics
- No merged PRs in 30d
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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