Function setSimilarity

packages/tools/api-diff/src/Diff.ts:60–71

(left: ReadonlySet<string>, right: ReadonlySet<string>)

}

const setSimilarity = (left: ReadonlySet<string>, right: ReadonlySet<string>): number => {
  if (left.size === 0 && right.size === 0) {
    return 1
  }
  let shared = 0
  for (const value of left) {
    if (right.has(value)) {
      shared++
    }
  }
  return shared / (left.size + right.size - shared)
}

const documentationTokenCache = new WeakMap<ApiEntity, ReadonlySet<string>>()