Tutorial by Examples: en

def results = [] (1..4).each{ def what = (it%2) ? 'odd' : 'even' results << what } assert results == ['odd', 'even', 'odd', 'even'] Here, the if-condition (in (parentheses)) is slightly more complex than just testing for existence/Groovy-Truth.

public void SaveNewEmployee(Employee newEmployee) { // best practice - wrap all database connections in a using block so they are always closed & disposed even in the event of an Exception // best practice - retrieve the connection string by name from the app.config or web.config (dep...

The easiest way to install and manage various versions of Ruby with rbenv is to use the ruby-build plugin. First clone the rbenv repository to your home directory: $ git clone https://github.com/rbenv/rbenv.git ~/.rbenv Then clone the ruby-build plugin: $ git clone https://github.com/rbenv/rub...

Suppose the make fails: $ make Launch it instead with make VERBOSE=1 to see the commands executed. Then directly run the linker or compiler command that you'll see. Try to make it work by adding necessary flags or libraries. Then figure out what to change, so CMake itself can pass correct argum...

var baseType = typeof(List<>); var genericType = baseType.MakeGenericType(typeof(String)); var instance = Activator.CreateInstance(genericType); var method = genericType.GetMethod("GetHashCode"); var result = method.Invoke(instance, new object[] { });

If your enum class is required to have static fields, keep in mind they are created after the enum values themselves. That means, the following code will result in a NullPointerException: enum Example { ONE(1), TWO(2); static Map<String, Integer> integers = new HashMap<>(); ...

public class InsertIntoConcurrentHashMap { public static void main(String[] args) { ConcurrentHashMap<Integer, SomeObject> concurrentHashMap = new ConcurrentHashMap<>(); SomeObject value = new SomeObject(); Integer key = 1; SomeObject ...

import java.io.FileReader; import java.io.IOException; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; import javax.script.ScriptException; public class InterfaceImplementationExample { public static interface Pet { public void eat(); } p...

You should already have your backend REST resource available. On the client side (GWT) your need to Add RestyGwt dependency to your project with maven <dependency> <groupId>org.fusesource.restygwt</groupId> <artifactId>restygwt</artifactId> <vers...

The way to do a JAX-WS call with basic authentication is a little unobvious. Here is an example where Service is the service class representation and Port is the service port you want to access. Service s = new Service(); Port port = s.getPort(); BindingProvider prov = (BindingProvider)port; ...

Let's say you have this line of code: printf("Hello, world!\n"); Now say you want to change the text to "Program exiting." CommandBufferMnemonicci"printf("¦");change in the ".Program exiting.\n<esc>printf("Program exiting.\n");

git log master..foo will show the commits that are on foo and not on master. Helpful for seeing what commits you've added since branching!

This can be easily accomplished by calling Enumerable#to_a on a Range object: (1..10).to_a #=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] (a..b) means that it will include all numbers between a and b. To exclude the last number, use a...b a_range = 1...5 a_range.to_a #=> [1, 2, 3, 4] or...

Consider the program implicit none integer f, i f(i)=i print *, f(1) end Here f is a statement function. It has integer result type, taking one integer dummy argument.1 Such a statement function exists within the scope in which it is defined. In particular, it has access to variables an...

Instead of web pages, we can also load the document files into iOS WebView like .pdf, .txt, .doc etc.. loadData method is used to load NSData into webview. Swift //Assuming there is a text file in the project named "home.txt". let localFilePath = NSBundle.mainBundle().pathForResource(&...

Creating Gradient UIImage with colors in CGRect Swift: extension UIImage { static func gradientImageWithBounds(bounds: CGRect, colors: [CGColor]) -> UIImage { let gradientLayer = CAGradientLayer() gradientLayer.frame = bounds gradientLayer.colors = colors ...

+ (CALayer *)gradientBGLayerForBounds:(CGRect)bounds colors:(NSArray *)colors { CAGradientLayer * gradientBG = [CAGradientLayer layer]; gradientBG.frame = bounds; gradientBG.colors = colors; return gradientBG; }

As all threads are running in the same process, all threads have access to the same data. However, concurrent access to shared data should be protected with a lock to avoid synchronization issues. import threading obj = {} obj_lock = threading.Lock() def objify(key, val): print("O...

Code running in different processes do not, by default, share the same data. However, the multiprocessing module contains primitives to help share values across multiple processes. import multiprocessing plain_num = 0 shared_num = multiprocessing.Value('d', 0) lock = multiprocessing.Lock() ...

You can get the current location and local places of user by using the Google Places API. Ar first, you should call the PlaceDetectionApi.getCurrentPlace() method in order to retrieve local business or other places. This method returns a PlaceLikelihoodBuffer object which contains a list of PlaceLi...