for i := 0; i < 5<<10; i++ {
		b.Write(buf)
		b.Read(buf)
		if i == 0 {
			cap0 = b.Cap()
		}
	}
	cap1 := b.Cap()
	// (*Buffer).grow allows for 2x capacity slop before sliding,
	// so set our error threshold at 3x.
	if cap1 > cap0*3 {
		t.Errorf("buffer cap = %d; too big (grew from %d)", cap1, cap0)
	}
}

func BenchmarkWriteByte(b *testing.B) {
	const n = 4 << 10
	b.SetBytes(n)

// A simple in-out test: Do we print what we parse?

func setArch(goarch string) (*arch.Arch, *obj.Link) {
	buildcfg.GOOS = "linux" // obj can handle this OS for all architectures.
	buildcfg.GOARCH = goarch
	architecture := arch.Set(goarch, false)
	if architecture == nil {
		panic("asm: unrecognized architecture " + goarch)
	}
	ctxt := obj.Linknew(architecture.LinkArch)
	ctxt.Pkgpath = "pkg"
	return architecture, ctxt
}

**Spoiler alert**: the tutorial - user guide includes:

* Declaration of **parameters** from other different places as: **headers**, **cookies**, **form fields** and **files**.
* How to set **validation constraints** as `maximum_length` or `regex`.
* A very powerful and easy to use **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** system.

    assertEquals(TypeToken.of(String.class), invokable.getReturnType());
  }

  public <T extends List<String>> void testMethod_parameterTypes() throws NoSuchMethodException {
    Method setMethod = List.class.getMethod("set", int.class, Object.class);
    Invokable<T, ?> invokable = new TypeToken<T>(getClass()) {}.method(setMethod);
    ImmutableList<Parameter> params = invokable.getParameters();
    assertEquals(2, params.size());

		},
		// TestXLStorage case - 4.
		// TestXLStorage case with io error count set to 1.
		// expected not to fail.
		{
			srcVol:      "src-vol",
			destVol:     "dest-vol",
			srcPath:     "file3",
			destPath:    "file-two",
			expectedErr: nil,
		},
		// TestXLStorage case - 5.
		// TestXLStorage case with io error count set to maximum allowed count.
		// expected not to fail.
		{

    Thread result = requireNonNull(platformThreadFactory().newThread(runnable));
    try {
      result.setName(name);
    } catch (SecurityException e) {
      // OK if we can't set the name in this environment.
    }
    return result;
  }

  // TODO(lukes): provide overloads for ListeningExecutorService? ListeningScheduledExecutorService?

* **Deep Learning**: this is a sub-field of Machine Learning, so, the same applies. It's just that there is not a single spreadsheet of numbers to multiply, but a huge set of them, and in many cases, you use a special processor to build and / or use those models.

### Concurrency + Parallelism: Web + Machine Learning

    server.enqueue(
      MockResponse.Builder()
        .addHeader("Set-Cookie: a=FIRST")
        .addHeader("Last-Modified: " + formatDate(-1, TimeUnit.HOURS))
        .addHeader("Cache-Control: max-age=0")
        .body("A")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .addHeader("Set-Cookie: a=SECOND")
        .code(HttpURLConnection.HTTP_NOT_MODIFIED)

          if (!foundAndRemovedExactReference(forgetMeNot, moved.replaced)) {
            skipMe.add(moved.replaced);
          }
        }
        cursor--;
        nextCursor--;
      } else { // we must have set lastFromForgetMeNot in next()
        checkState(removeExact(requireNonNull(lastFromForgetMeNot)));
        lastFromForgetMeNot = null;
      }
    }

    // ===================================================================================
    //                                                                     Aggregation Set
    //                                                                           =========

    public void filter(String name, EsAbstractConditionQuery.OperatorCall<BsDuplicateHostCQ> queryLambda,