Issue #13780 has been updated by naruse (Yui NARUSE).


nobu (Nobuyoshi Nakada) wrote:
> naruse (Yui NARUSE) wrote:
> > ```diff
> > +    if (!unicode_p) {
> > +	return rb_str_enumerate_codepoints(str, wantarray);
> > +    }
> 
> Why codepoints?

Ah, it should be chars; thanks!

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Feature #13780: String#each_grapheme
https://bugs.ruby-lang.org/issues/13780#change-66169

* Author: rbjl (Jan Lelis)
* Status: Assigned
* Priority: Normal
* Assignee: naruse (Yui NARUSE)
* Target version: 2.5
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Ruby's regex engine has support for graphemes via `\X`:

https://github.com/k-takata/Onigmo/blob/791140951eefcf17db4e762e789eb046ea8a114c/doc/RE#L117-L124

This is really useful when working with Unicode strings. However, code like `string.scan(/\X/)` is not so readable enough, which might lead people to use String#each_char, when they really should split by graphemes.

What I propose is two new methods:

- String#each_grapheme which returns an Enumerator of graphemes (in the same way like `\X`)

and 

- String#graphemes which returns an Array of graphemes (in the same way like `\X`)

What do you think?

Resources

- Unicode Standard Annex #29: Unicode Text Segmentation: http://unicode.org/reports/tr29/
- Related issue: https://bugs.ruby-lang.org/issues/12831




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