Method check

tfjs-core/src/io/composite_array_buffer.ts:170–178

(shard: BufferShard)

    // shard. That means we need a function to check where the byteIndex lies
    // relative to a given shard.
    function check(shard: BufferShard) {
      if (byteIndex < shard.start) {
        return -1;
      }
      if (byteIndex >= shard.end) {
        return 1;
      }
      return 0;
    }

    // For efficiency, try the previous shard first.
    if (check(this.shards[this.previousShardIndex]) === 0) {