export function parseLineByLine<T>(
  buffer: Uint8Array,
  cb: (line: string) => T | undefined,
): T[] {
  let blockStart = 0
  const entries: T[] = []
  const decoder = new TextDecoder('ascii')
  while (blockStart < buffer.length) {
    const n = buffer.indexOf(10, blockStart)
    if (n === -1) {
      break
    }
    const b = buffer.subarray(blockStart, n)
    const line = decoder.decode(b).trim()
    if (line) {
      const entry = cb(line)
      if (entry) {
        entries.push(entry)
      }
    }

    blockStart = n + 1
  }
  return entries
}

// Count non-gap characters in a string
export function countNonGapBases(seq: string) {
  let count = 0
  for (const char of seq) {
    if (char !== '-' && char !== ' ') {
      count++
    }
  }
  return count
}