[headlessNode]

Resolves stdlib-js/metr-issue-tracker#1316.

Description

What is the purpose of this pull request?

This pull request fixes inconsistencies across the index-returning packages in blas/ext/base. For each family, a canonical structure and wording was established from the family's most consistent member and applied to all siblings.

Bird's eye view of the changes:

• Tests: refactored test tapes to a canonical structure: single-assertion main behavior tapes; separate tapes for an x (and y) stride, negative strides, view offsets (main), and index offsets (ndarray), each with accessor twins in g packages; added missing tapes (offsets, complex accessors, arity, no-match -1, NaN comparison); normalized tape titles, data, and spacing; removed redundant tapes flagged in review.
• REPL: normalized example section labels (// Standard usage:, // Using `N` and stride parameters:, // Using view offsets:, // Using index offset(s):), added missing stride/offset example blocks, var only on the first assignment within a section, wrapped description text consistently, and fixed lines exceeding the 80-character render limit.
• READMEs: normalized Notes wording (NaN/-0/+0 comparison notes, the "If the function is unable to find ... the function returns -1." usage sentence, N <= 0 first Notes bullet), parameter bullet style and stride/offset parameter descriptions ("stride length for ...", "starting index for ..."), example data and comment styles across siblings, and restored missing template comments.
• TypeScript declarations and tests: notes parity in index.d.ts, added missing $ExpectError cases (e.g., function arguments), normalized arity-block arguments, and added missing complex-array imports.
• Library JSDoc: notes parity across lib/*.js files (including .native.js), normalized descriptions and parameter wording, and added matrix visualization comments per family canon.
• C sources: aligned @param comment spacing in src/main.c, normalized NAPI macro ordering in src/addon.c, canonical comments in examples/c/example.c and README C sections (// Perform a search:, printf( "index value: %d\n", idx )), const input arrays, and parameter wording in doc comments.
• Examples and benchmarks: logEach-based logging for complex input arrays, normalized data generation ranges, and corrected benchmark require paths and helper naming.
• package.json: normalized descriptions and keywords per family conventions.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• Resolves [RFC]: fix inconsistencies across packages in blas/ext/base* metr-issue-tracker#1316.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

Primarily written by Claude Code.

---

@stdlib-js/reviewers

[headlessNode]

@kgryte This ended up being a lot bigger than I expected. The 'fixes' are mostly docs and tests related. I will updated the currently open related PR's as well.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
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blas/ext/base/gfind-last-index	$\\color{green}200/200$ $\\color{green}+0.00\\%$	$\\color{green}9/9$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}200/200$ $\\color{green}+0.00\\%$
blas/ext/base/gfirst-index-almost-equal	$\\color{green}293/293$ $\\color{green}+0.00\\%$	$\\color{green}21/21$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}293/293$ $\\color{green}+0.00\\%$
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blas/ext/base/gfirst-index-greater-than	$\\color{green}284/284$ $\\color{green}+0.00\\%$	$\\color{green}21/21$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}284/284$ $\\color{green}+0.00\\%$
blas/ext/base/gfirst-index-greater-than-equal	$\\color{green}284/284$ $\\color{green}+0.00\\%$	$\\color{green}21/21$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}284/284$ $\\color{green}+0.00\\%$
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blas/ext/base/gindex-of-falsy	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
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blas/ext/base/gindex-of-greater-than	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-greater-than-equal	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-less-than	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-less-than-equal	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-not-equal	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}19/19$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-row	$\\color{red}470/554$ $\\color{green}+0.00\\%$	$\\color{red}36/37$ $\\color{green}+0.00\\%$	$\\color{red}3/4$ $\\color{green}+0.00\\%$	$\\color{red}470/554$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-same-value	$\\color{green}266/266$ $\\color{green}+0.00\\%$	$\\color{green}22/22$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}266/266$ $\\color{green}+0.00\\%$
blas/ext/base/gindex-of-truthy	$\\color{green}260/260$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}3/3$ $\\color{green}+0.00\\%$	$\\color{green}260/260$ $\\color{green}+0.00\\%$
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blas/ext/base/glast-index-almost-same-value	$\\color{green}193/193$ $\\color{green}+0.00\\%$	$\\color{green}9/9$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}193/193$ $\\color{green}+0.00\\%$
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blas/ext/base/sindex-of-falsy	$\\color{green}373/373$ $\\color{green}+0.00\\%$	$\\color{green}19/19$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}373/373$ $\\color{green}+0.00\\%$
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blas/ext/base/sindex-of-row	$\\color{green}543/543$ $\\color{green}+0.00\\%$	$\\color{green}49/49$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}543/543$ $\\color{green}+0.00\\%$
blas/ext/base/sindex-of-truthy	$\\color{green}373/373$ $\\color{green}+0.00\\%$	$\\color{green}19/19$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}373/373$ $\\color{green}+0.00\\%$
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blas/ext/base/slast-index-of-falsy	$\\color{green}380/380$ $\\color{green}+0.00\\%$	$\\color{green}17/17$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}380/380$ $\\color{green}+0.00\\%$
blas/ext/base/slast-index-of-row	$\\color{green}587/587$ $\\color{green}+0.00\\%$	$\\color{green}47/47$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}587/587$ $\\color{green}+0.00\\%$
blas/ext/base/slast-index-of-truthy	$\\color{green}380/380$ $\\color{green}+0.00\\%$	$\\color{green}17/17$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}380/380$ $\\color{green}+0.00\\%$
blas/ext/base/zindex-of	$\\color{green}404/404$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}404/404$ $\\color{green}+0.00\\%$
blas/ext/base/zindex-of-column	$\\color{green}560/560$ $\\color{green}+0.00\\%$	$\\color{green}51/51$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}560/560$ $\\color{green}+0.00\\%$
blas/ext/base/zindex-of-falsy	$\\color{green}394/394$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}394/394$ $\\color{green}+0.00\\%$
blas/ext/base/zindex-of-row	$\\color{green}560/560$ $\\color{green}+0.00\\%$	$\\color{green}51/51$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}560/560$ $\\color{green}+0.00\\%$
blas/ext/base/zindex-of-truthy	$\\color{green}394/394$ $\\color{green}+0.00\\%$	$\\color{green}20/20$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}394/394$ $\\color{green}+0.00\\%$
blas/ext/base/zlast-index-of-falsy	$\\color{green}388/388$ $\\color{green}+0.00\\%$	$\\color{green}17/17$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}388/388$ $\\color{green}+0.00\\%$
blas/ext/base/zlast-index-of-row	$\\color{green}613/613$ $\\color{green}+0.00\\%$	$\\color{green}49/49$ $\\color{green}+0.00\\%$	$\\color{green}4/4$ $\\color{green}+0.00\\%$	$\\color{green}613/613$ $\\color{green}+0.00\\%$

The above coverage report was generated for the changes in this PR.

[kgryte]

@headlessNode You are too blindly making changes. The general rule is:

1. If a comment applies to the next line and next line only, use a colon.
2. If a comment applies to multiple lines and/or a block of code, use ellipses.

(1) can be loosened for <= 3 consecutive lines if it is "obvious" that all statements belong to the same comment. As such, we can keep this change; however, to minimize future noise, it is useful to remember the guidance above.

[kgryte]

Okay. Looks like this was a false flag. I checked elsewhere in the codebase (other namespaces). And consistently we use Attached to main export. So, no need to deviate here. You can revert everything back to Attached to main export. Sorry for the noise.

[headlessNode]

Np. Fixed the ellipses/colon one as well.

[kgryte]

Okay. I went through all the files. Things look fine. A significant amount of technical debt had accumulated, so getting this in sooner rather than later will be good for mitigating further spread.

@headlessNode You may want to check your current PRs once this is merged, as some of those may also need updating.

[kgryte]

As the CI failure is expected, I'll go ahead and merge.