array.reduce() improvements

[hamishwillee]

Fixes #10524

This is not precisely a "fix" but is a slight improvement to Array.prototype.reduce() that fell out of the discussion (i.e. that issue is not actually a bug, but did make us think we could improve this).

What this does:

• In introduction provides overview of what happens in the first iteration.
• Splits the with/without initial value examples into separate headings and just uses arrow functions. Also uses different array values so that the things that relevant points are easier to see in the tables (i.e. the index iteration and the movement of the previousValue.

A really thorough fix might be to replace the spec inclusion in the description with hand written text. I could do that, and I think it would be good, but there are things I consider higher value at this point.

[github-actions]

Preview URLs

• https://pr10555.content.dev.mdn.mozit.cloud/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce

Flaws

None! 🎉

External URLs

URL: /en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
Title: Array.prototype.reduce()
on GitHub

No new external URLs

(this comment was updated 2021-11-22 18:12:02.257109)

[wbamberg]

Thanks @hamishwillee ! I think this is better! I found a few issues and had a couple of other suggestions.

[hamishwillee]

Thanks. Ready for re-review!

[wbamberg]

Thanks for the updates @hamishwillee ! The description of the arguments, especially the tables, need to be updated given we have different array values now.

[wbamberg]

If the array is const array = [15, 16, 17, 18, 19];, then the values in this table need to be updated.

[wbamberg]

...and this one too.

[hamishwillee]

Thanks @wbamberg . Both fixed. Wish I had a good excuse.

[wbamberg]

👍 thanks Hamish!