stop.\n@mixin gradient-y($start-color: $gray-700, $end-color: $gray-800, $start-percent: 0%, $end-percent: 100%) {\n  background-image: linear-gradient(to bottom, $start-color $start-percent, $end-color $end-percent);\n  background-repeat: repeat-x;\n}\n\n@mixin gradient-directional($start-color: $gray-700, $end-color: $gray-800, $deg: 45deg) {\n  background-image: linear-gradient($deg, $start-color, $end-color);\n  background-repeat: repeat-x;\n}\n@mixin gradient-x-three-colors($start-color: $blue, $mid-color:...

 * to observing Firefox or Chrome browser behaviour.
 */
class ApacheHttpClientHttp2Test {
  @Test
  fun testHttp2() {
    val client = HttpAsyncClients.createHttp2Default()

    client.use { client ->
      client.start()
      val request = SimpleHttpRequests.get("https://google.com/robots.txt")
      val response = client.execute(request, LoggingCallback).get()

      println("Protocol ${response.version}")

                    "title": "Body_read_items_items__item_id__put",
                    "type": "object",
                    "properties": {
                        "start_datetime": {
                            "title": "Start Datetime",
                            "type": "string",
                            "format": "date-time",
                        },
                        "end_datetime": {

                        "start_date": {
                            "type": "string",
                            "format": "date-time",
                            "title": "Start Date",
                        },
                    },
                    "type": "object",
                    "required": ["username", "monthly_fee", "start_date"],
                    "title": "Subscription",

$ cd code
// Create a directory for this project
$ mkdir awesome-project
// Enter into that project directory
$ cd awesome-project
```

</div>

## Create a Virtual Environment

When you start working on a Python project **for the first time**, create a virtual environment **<abbr title="there are other options, this is a simple guideline">inside your project</abbr>**.

/// tip

  public void requestOauthSession(String scopes, String team) throws Exception {
    if (sessionFactory == null) {
      sessionFactory = new OAuthSessionFactory(slackApi);
      sessionFactory.start();
    }

    HttpUrl authorizeUrl = sessionFactory.newAuthorizeUrl(scopes, team, session -> {
      initOauthSession(session);
      System.out.printf("session granted: %s\n", session);
    });

public final class UncaughtExceptionHandlers {
  private UncaughtExceptionHandlers() {}

  /**
   * Returns an exception handler that exits the system. This is particularly useful for the main
   * thread, which may start up other, non-daemon threads, but fail to fully initialize the
   * application successfully.
   *
   * <p>Example usage:
   *
   * <pre>
   * public static void main(String[] args) {

	errDuplicatedXMLTag = Errorf("duplicated XML Tag")
	errUnknownXMLTag    = Errorf("unknown XML Tag")
)

// UnmarshalXML - decodes XML data.
func (tag *Tag) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error) {
	var keyAlreadyParsed, valueAlreadyParsed bool
	for {
		// Read tokens from the XML document in a stream.
		t, err := d.Token()
		if err != nil {
			if err == io.EOF {
				break
			}

}

// msgUnPath converts a etcd path to domainName.
func msgUnPath(s string) string {
	l := strings.Split(s, etcdPathSeparator)
	if l[len(l)-1] == "" {
		l = l[:len(l)-1]
	}
	// start with 1, to strip /skydns
	for i, j := 1, len(l)-1; i < j; i, j = i+1, j-1 {
		l[i], l[j] = l[j], l[i]
	}
	return dnsJoin(l[1 : len(l)-1]...)

min_perf_pct=100

[sysctl]
fs.xfs.xfssyncd_centisecs=72000
net.core.busy_read=50
net.core.busy_poll=50
kernel.numa_balancing=1

# Do not use swap at all
vm.swappiness=0
vm.vfs_cache_pressure=50

# Start writeback at 3% memory
vm.dirty_background_ratio=3
# Force writeback at 10% memory
vm.dirty_ratio=10

# Quite a few memory map
# areas may be consumed
vm.max_map_count=524288

# Default is 500000 = 0.5ms