josdejong/mathjs

Rationalize giving error on 1/(x^-2)

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#1,724 opened on Jan 27, 2020

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bughelp wanted

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Description

Running math.rationalize('1/(x^-2)') gives the error Cannot read property '1' of undefined.

However, running math.rationalize('1/(x^-1)') gives the result x as you'd expect.

I'm using mathjs 6.5.0. Haven't tested other versions.

Contributor guide

Research direction
Inspect the rationalize function and trace how it parses and simplifies expressions with negative exponents. Focus on the code path for '1/(x^ 2)' and compare with '1/(x^ 1)' to find where the error occurs.
Tech stack
javascript
Domain
api
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75