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Update ruby.md documentation #200

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Update ruby.md documentation #200

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7 changes: 6 additions & 1 deletion site/using/ruby.md
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Expand Up @@ -35,6 +35,11 @@ If your embeddings are provided as a list of numbers, use `.pack("f*")` to conve

```ruby
embedding = [0.1, 0.2, 0.3, 0.4]
result = db.execute("SELECT vec_length(?)", [query.pack("f*")]])
result = db.execute("SELECT vec_length(?)", [query.pack("f*")])
puts result.first.first # 4

# Or, if using Active Record:
embedding_blob = embedding.pack("f*").unpack1('H*') # Hex string representation
result = ActiveRecord::Base.connection.execute("SELECT vec_length(x'#{embedding_blob}')")
result.first.first.last
```