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A comment on Show HN: A SQL database implemented purely in TypeScript type annotations. Parent comment

Re:Show HN: A SQL database implemented purely in TypeScript ... by maple3142 on Monday September 28, 2020 @12:12PM (#24618221)
Example:

  const x = { a: 1, b: 2, c: 3 }
  const y: { a: number, b: number } = x
  console.log(Object.keys(y))
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