Glossary — K
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Key (object property)
The name part of a name-value pair in a JavaScript object. In { name: "George", age: 99 }, name and age are the keys.
See also: Object, JavaScript
Key (database — primary, foreign)
In a relational database, a primary key is the column (or combination of columns) that uniquely identifies each row in a table. A foreign key is a column whose value matches a primary key in another table — that’s how tables connect to each other.
See also: Schema design, Joins
Kubernetes (k8s)
An open-source system for orchestrating containers across many servers. If Docker is “ship the environment with the app,” Kubernetes is “run thousands of containers across hundreds of machines, with automatic restarts, load balancing, and rolling updates.” Overkill for most projects; essential at very large scale. Vercel-style platforms abstract Kubernetes (and similar) away entirely.
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