53 lines
1.3 KiB
Markdown
53 lines
1.3 KiB
Markdown
extends: post.liquid
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title: Unicode codepoints in ruby
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date: 06 Nov 2013 12:04:00 +0100
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path: /:year/:month/:day/unicode-codepoints-in-ruby
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---
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Another post of the category "better write it down before you forget it".
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I ❤ Unicode. Atleast most of the time. That's why I have things like ✓, ✗ and
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ツ mapped directly on my keyboard.
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But sometimes you need not only the symbol itself, but maybe the codepoint as well. That's easy in ruby:
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~~~ruby
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irb> "❤".codepoints
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=> [10084]
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~~~
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Got some codepoints and need to map it back to it's symbol? Easy:
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~~~ruby
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irb> [10084, 10003].pack("U*")
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=> "❤✓"
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~~~
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Oh, of course the usual `\uXYZ` syntax works aswell, but you need the hexstring for that:
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~~~ruby
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irb> 10084.to_s 16
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=> "2764"
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irb> "\u{2764}"
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=> "❤"
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~~~
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Sometimes you may need to see the actual bytes. This is easy in ruby aswell:
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~~~ruby
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irb> "❤".bytes
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=> [226, 157, 164]
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~~~
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There is documentation on these things:
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* [each_codepoint][]
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* [codepoints][]
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* [bytes][]
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Enjoy the world of unicode! [❤][unicode-heart]
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[each_codepoint]: http://www.ruby-doc.org/core-2.0.0/String.html#method-i-each_codepoint
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[codepoints]: http://www.ruby-doc.org/core-2.0.0/String.html#method-i-codepoints
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[bytes]: http://www.ruby-doc.org/core-2.0.0/String.html#method-i-bytes
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[unicode-heart]: http://codepoints.net/U+2764
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