// Note that the assist ratio values are updated atomically
	// but not together. This means there may be some degree of
	// skew between the two values. This is generally OK as the
	// values shift relatively slowly over the course of a GC
	// cycle.
	assistWorkPerByte := float64(scanWorkRemaining) / float64(heapRemaining)
	assistBytesPerWork := float64(heapRemaining) / float64(scanWorkRemaining)
	c.assistWorkPerByte.Store(assistWorkPerByte)

	// never exceeds pallocChunkDensePages over the course of a single GC cycle, the chunk
	// becomes eligible for scavenging on the next cycle. If a chunk ever hits this density
	// threshold it immediately becomes unavailable for scavenging in the current cycle as
	// well as the next.
	//
	// [min, max) represents the range of chunks that is safe to access (i.e. will not cause

In this example, the `moveFile` task uses the `Copy` task type to specify the source and destination directories.
Inside the `doLast` closure, it uses `File.renameTo()` to move the file from the source directory to the destination directory:

[source,groovy]
----
task moveFile {
    doLast {
        def sourceFile = file('source.txt')
        def destFile = file('destination/new_name.txt')

 * standard JDK exceptions such as {@link java.util.NoSuchElementException} or {@link
 * UnsupportedOperationException} in the situations they are intended for.
 *
 * <h3>Non-preconditions</h3>
 *
 * <p>It is of course possible to use the methods of this class to check for invalid conditions
 * which are <i>not the caller's fault</i>. Doing so is <b>not recommended</b> because it is

 * standard JDK exceptions such as {@link java.util.NoSuchElementException} or {@link
 * UnsupportedOperationException} in the situations they are intended for.
 *
 * <h3>Non-preconditions</h3>
 *
 * <p>It is of course possible to use the methods of this class to check for invalid conditions
 * which are <i>not the caller's fault</i>. Doing so is <b>not recommended</b> because it is

properties mean that Gradle will skip the task if none of the source files, template engine, model data or generated files has changed since the previous time Gradle executed the task. This will often save a significant amount of time. You can learn how Gradle detects <<#sec:how_does_it_work,changes later>>.

This example is particularly interesting because it works with collections of source files. What happens if only one source file changes? Does the task process all the source files again...

	if ruleFile == nil {
		// Open a log file to write log to. We open in append
		// mode because all.bash runs the compiler lots of times,
		// and we want the concatenation of all of those logs.
		// This means, of course, that users need to rm the old log
		// to get fresh data.
		// TODO: all.bash runs compilers in parallel. Need to synchronize logging somehow?
		w, err := os.OpenFile(filepath.Join(os.Getenv("GOROOT"), "src", "rulelog"),

// comes from a block with >1 successor and goes to a block with >1
// predecessor).  This makes it easy to add fixup code on merge edges -
// the source of a merge edge has only one successor, so we can add
// fixup code to the end of that block.

// Spilling
//
// During the normal course of the allocator, we might throw a still-live
// value out of all registers. When that value is subsequently used, we must

      "hostUsers": true,
      "schedulingGates": [
        {
          "name": "nameValue"
        }
      ],
      "resourceClaims": [
        {
          "name": "nameValue",
          "source": {
            "resourceClaimName": "resourceClaimNameValue",
            "resourceClaimTemplateName": "resourceClaimTemplateNameValue"
          }
        }
      ]
    }
  }

        "schedulingGates": [
          {
            "name": "nameValue"
          }
        ],
        "resourceClaims": [
          {
            "name": "nameValue",
            "source": {
              "resourceClaimName": "resourceClaimNameValue",
              "resourceClaimTemplateName": "resourceClaimTemplateNameValue"
            }
          }
        ]
      }
    }
  },