Everything I built with Claude Artifacts this week(simonwillison.net)

  fn encode_rle(&self, value: u64, count: usize) -> u64 {
      let selector = Simple8bSelector::RLE as u64;
      (selector << 60) | ((count as u64) << 30) | (value & 0x3FFFFFFF)
  }

  fn try_rle(&self, input: &[u64]) -> Option<(u64, usize)> {
      if input.is_empty() {
          return None;
      }

      let value = input[0];
      let mut count = 1;

      for &x in input.iter().skip(1) {
          if x != value || count >= 0x3FFFFFFF {  // Max 30-bit run length
              break;
          }
          count += 1;
      }

      Some((value, count))
  }