# 1536
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# Actually... sorry... it was 3072
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(this joke worked better before)
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# We had a problem
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[Cord.com baby!](https://cord.com/)
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---
---
---
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# So... use Elastic Search?!
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# What about the new shiny thing?!
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# Wait... how does it work?
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# Show of hands
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---
---
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# It's far more than keyword search
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# How many numbers?
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# I lied. The year was not 1536.
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1536, 3072
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# Cosine Similarity
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---
```typescript
function dot(a: number[], b: number[]) {
return a.map((x, i) => a[i] * b[i]).reduce((m, n) => m + n);
}
function norm(v: number[]) {
return Math.sqrt(dot(v, v));
}
export function cosineSimilarity(a: number[], b: number[]): number {
return dot(a, b) / (norm(a) * norm(b));
}
```
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# To the terminal!
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# Thank you! ❤️
**Questions?**
### >>> jack@cord.com
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{"description":"Man crying","title":"Why Are Embeddings So Absurdly Useful","contributors":"[{\"id\":\"023103e3-69ca-4950-a1f0-0212c6dcb3a4\",\"add\":5627,\"del\":3289}]"}