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grapheme_cluster_counting

📏 Count grapheme clusters with \X in regex​

Ruby’s Oniguruma engine supports \X for extended grapheme clusters, ensuring you treat composed characters (emojis, accented letters) as single user‑perceived units. This is essential for accurate UI metrics, slicing, and validation in internationalized applications.

s = "🇺🇸é"
puts s.length              # => 4 (4 codepoints)
puts s.scan(/\X/).size    # => 2 ("🇺🇸" and "é")
# You can also safely slice by cluster index:
clusters = s.scan(/\X/)
puts clusters[1]           # => "é"