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Improving type narrowing - Effect Community

Effect Community•7mo ago

Improving type narrowing

Is there a better way of doing something like this?

  const isPostOrComment = (
    activity: typeof RawRedditActivity.Type,
  ): activity is typeof RawRedditPost.Type | typeof RawRedditComment.Type =>
    activity.kind === RawRedditPost.fields.kind.literals[0] ||
    activity.kind === RawRedditComment.fields.kind.literals[0];

  const isPostOrComment = (
    activity: typeof RawRedditActivity.Type,
  ): activity is typeof RawRedditPost.Type | typeof RawRedditComment.Type =>
    activity.kind === RawRedditPost.fields.kind.literals[0] ||
    activity.kind === RawRedditComment.fields.kind.literals[0];