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Convert emoji and codepoints each other in Ruby

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The tips below are what I've learned while implementing a gem, github_reactions, to summarize reactions on GitHub issues and pull requests.

Get codepoints from emoji

"πŸ‘".unpack("U*")
=> [128077]

"πŸ‘".codepoints
=> [128077]

# Convert to hexadecimal
"πŸ‘".each_codepoint.map {|n| n.to_s(16) }
=> ["1f44d"]

Get emoji from codepoints

[128077].pack("U*")
=> "πŸ‘"

0x1f44d.chr('UTF-8')
=> "πŸ‘"

"\u{1f44d}"
=> "πŸ‘"
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Classic DEV Post from Nov 12 '19

Feeling excluded and sad for not getting positive feedback - How should I react?

Masato Ohba profile image
Software Engineer