mearns

class CheckBoxSystem {
  CheckBoxSystem () {
    CheckBox checkBox = new CheckBox(false);
    
    CheckBoxController controller = new CheckBoxController(checkBox.getMutator());
    CheckBoxViewer viewer = new CheckBoxViewer(checkBox.getReadOnlyView());
    
    // ...
  }
}

mearns

// View interface for Controller
interface MutableCheckbox {
  void setState (boolean isChecked);
}

// View interface for components that only need to know the state
interface ReadOnlyCheckbox {
  boolean getState ();
}

mearns

interface CheckBoxInterface {
  void setState (boolean isChecked);
  boolean getState ();
}

mearns

# A helper class for encapsulating information about the installation and configuration of the app.
class MyApp
  def initialize(node)
    @node = node
  end
  
  # The name of the application
  def app_name
    'MyApp'
  end

mearns

template myapp.config_file_path do        # Access helper library methods inside a recipe.
  source 'config.yml.erb'
  owner 'root'
  group 'root'
  mode '644'
  variables(
    log_level: myapp.logging_level        # Access helper library methods inside a resource
    log_file_path: myapp.log_file_path
  )
end

mearns

If you run python a.py from this directory, you get an error such as:

Traceback (most recent call last):
  File "a.py", line 1, in <module>
    import b
  File "./b.py", line 1, in <module>
    import a
  File "./a.py", line 3, in <module>
 b.bar()

mearns

import com.google.common.base.Suppliers;
import com.google.common.collect.Lists;

import javax.annotation.Nullable;
import javax.validation.constraints.NotNull;
import java.util.Collection;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;

mearns

map.put(key, value)
  .ifHadKey(oldValue -> System.out.println("Replaced " + oldValue + " at key " + key))
  .ifDidNotHaveKey(() -> System.out.println("New key added: " + key));

mearns

Map<String, Thing> createLookupMap (Collection<Thing> thingsToMap) {
    Map<String, Collection<Thing>> lookup = new HashMap<>();
    for (Thing thing : thingsToMap) {
        String propValue = thing.getSomeProperty();
        lookup.put(propValue, thing);
    }
    return lookup;
}

mearns

const foo = (() => {
    return bar() + baz()    // = 80, I think.
})
  .local('bar', () => 3*baz())
  .local('baz', () => 2*trot)
  .local('trot', 10)