CreateBatchSize          int
}

// Open initialize db session based on dialector
func Open(dialector Dialector, opts ...Option) (db *DB, err error) {
	config := &Config{}

	sort.Slice(opts, func(i, j int) bool {
		_, isConfig := opts[i].(*Config)
		_, isConfig2 := opts[j].(*Config)
		return isConfig && !isConfig2
	})

	for _, opt := range opts {
		if opt != nil {

しかし、そうすると「最初の文字を大文字に変換するあのメソッド」を呼び出す必要があります。

それは`upper`でしたか？`uppercase`でしたか？それとも`first_uppercase`？または`capitalize`？

そして、古くからプログラマーの友人であるエディタで自動補完を試してみます。

関数の最初のパラメータ`first_name`を入力し、ドット(`.`)を入力してから、`Ctrl+Space`を押すと補完が実行されます。

しかし、悲しいことに、これはなんの役にも立ちません:

<img src="https://fastapi.tiangolo.com/img/python-types/image01.png">

### 型の追加

先ほどのコードから一行変更してみましょう。

以下の関数のパラメータ部分を:

```Python

    checkNotNull(factory);
    return new ByteSourceFactory() {
      @Override
      public ByteSource createSource(byte[] bytes) throws IOException {
        return factory.createSource(bytes).slice(off, len);
      }

      @Override
      public byte[] getExpected(byte[] bytes) {
        byte[] baseExpected = factory.getExpected(bytes);
        int startOffset = (int) min(off, baseExpected.length);

    checkNotNull(factory);
    return new ByteSourceFactory() {
      @Override
      public ByteSource createSource(byte[] bytes) throws IOException {
        return factory.createSource(bytes).slice(off, len);
      }

      @Override
      public byte[] getExpected(byte[] bytes) {
        byte[] baseExpected = factory.getExpected(bytes);
        int startOffset = (int) min(off, baseExpected.length);

	var nonIPs []string
	for _, ip := range ipList {
		nip := net.ParseIP(ip)
		if nip != nil {
			ipV4s = append(ipV4s, nip)
		} else {
			nonIPs = append(nonIPs, ip)
		}
	}

	sort.Slice(ipV4s, func(i, j int) bool {
		// This case is needed when all ips in the list
		// have same last octets, Following just ensures that
		// 127.0.0.1 is moved to the end of the list.
		if ipV4s[i].IsLoopback() {

	}
	if err != nil {
		return ListObjectsV2Info{}, err
	}

	files, err := zipindex.DeserializeFiles(zipInfo)
	if err != nil {
		return ListObjectsV2Info{}, err
	}

	sort.Slice(files, func(i, j int) bool {
		return files[i].Name < files[j].Name
	})

	var (
		count           int
		isTruncated     bool
		nextToken       string
		listObjectsInfo ListObjectsV2Info
	)

		t.Error(err)
	}

	if !reflect.DeepEqual(got, want) {
		t.Errorf("got %s; want %s", toJSONString(got), toJSONString(want))
	}
}

// Slice: []Level3
func TestNestedPreload5(t *testing.T) {
	type (
		Level1 struct {
			ID       uint
			Value    string
			Level2ID uint
		}
		Level2 struct {
			ID       uint
			Level1   Level1

When you restart, it is immediate and non-disruptive to the applications. Each group of servers in the command-line is called a pool. There are 2 server pools in this example. New objects are placed in server pools in proportion to the amount of free space in each pool. Within each pool, the location of the erasure-set of drives is determined based on a deterministic hashing algorithm.

> **NOTE:** **Each pool you add must have the same erasure coding parity configuration as the original pool,...

	// It has a buffer size of 128K:
	// https://github.com/aws/aws-sdk-java/blob/master/aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/internal/eventstreaming/MessageDecoder.java#L26
	// but we must make sure there is always space to add 256 bytes:
	// https://github.com/aws/aws-sdk-java/blob/master/aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/SelectObjectContentEventStream.java#L197
	maxRecordMessageLength = (128 << 10) - 256
)

	policies := make(map[string]MappedPolicy, m.Size())
	m.Range(func(k string, v MappedPolicy) bool {
		policies[k] = v
		return true
	})
	return policies
}

// converts a mapped policy into a slice of distinct policies
func (mp MappedPolicy) toSlice() []string {
	var policies []string
	for _, policy := range strings.Split(mp.Policies, ",") {
		if strings.TrimSpace(policy) == "" {
			continue
		}