Checked Subtract Support

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
rust
Domain
data

Research direction

Start by reproducing the Rust Array1 subtraction example and inspect ndarray's existing arithmetic operation API. Determine the intended checked-subtraction behavior, including how element failures are represented, then add coverage demonstrating the requested usage and its completed behavior.

Written by the indexing model from the issue text.

Description

Running the following code...

let z: Array1<u32> = arr1(&[1,0,1]) - arr1(&[0,1,0]);

...causes a panic with attempt to subtract with overflow'

Would it be possible to get support for something such as

let z: Array1<u32> =  arr1(&[1,0,1]).checked_sub(arr1(&[0,1,0])).unwrap();

or is there an alternative approach one can suggest?

Dominant language
Rust
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Forks
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