Tutorial by Examples: ti

Suppose you want to prevent unauthorized users to access the page then you have to put barrier to them by authorizing access. We can do this by using spring-security which provides basic authentication by securing all HTTP end points. For that you need to add spring-security dependency to your proje...

C99 Since C99, C has variable length arrays, VLA, that model arrays with bounds that are only known at initialization time. While you have to be careful not to allocate too large VLA (they might smash your stack), using pointers to VLA and using them in sizeof expressions is fine. double sumAll(si...

When the only thing returned from a function is a recursive call, it is refered to as tail recursion. Here's an example countdown written using tail recursion: def countdown(n): if n == 0: print "Blastoff!" else: print n countdown(n-1) Any computat...

By default Python's recursion stack cannot exceed 1000 frames. This can be changed by setting the sys.setrecursionlimit(15000) which is faster however, this method consumes more memory. Instead, we can also solve the Tail Recursion problem using stack introspection. #!/usr/bin/env python2.4 # This...

Dependencies can be added for specific configuration like test/androidTest androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1' testCompile 'junit:junit:3.8.1' Alternatively create your own configuration configurations { myconfig } And then download dependency fo...

Selecting only the attribute value of a link:href will return the relative URL. String bodyFragment = "<div><a href=\"/documentation\">Stack Overflow Documentation</a></div>"; Document doc = Jsoup.parseBodyFragment(bodyFragment); ...

Sometimes we need to change words position from one place to another or reduce size of the words and change the color of words automatically to improve the attraction of our website or web apps. JQuery helps a lot with this concept using fadeIn(), hide(), slideDown() but its functionality are limite...

CREATE TABLE all_datetime_types( c_date date, c_timestamp timestamp ); Minimum and maximum data values: insert into all_datetime_types values ('0001-01-01','0001-01-01 00:00:00.000000001'); insert into all_datetime_types values ('9999-12-31','9999-12-31 23:59:59.999999999');

CREATE TABLE all_floating_numeric_types( c_float float, c_double double ); Minimum and maximum data values: insert into all_floating_numeric_types values (-3.4028235E38,-1.7976931348623157E308); insert into all_floating_numeric_types values (-1.4E-45,-4.9E-324); insert into all_floatin...

Do not allocate new objects in onDraw @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); Paint paint = new Paint(); //Do not allocate here } Instead of drawing drawables in canvas... drawable.setBounds(boundsRect); drawable.draw(canvas); Use a B...

The New-Object cmdlet is used to create an object. # Create a DateTime object and stores the object in variable "$var" $var = New-Object System.DateTime # calling constructor with parameters $sr = New-Object System.IO.StreamReader -ArgumentList "file path" In many instan...

To check for location services we need real device but for testing purpose we can also use simulator and add our own location by following below steps: add new GPX file into your project. in GPX file add waypoints like <?xml version="1.0"?> <gpx version="1.1" cre...

private List<FooBar> _fooBars; public List<FooBar> FooBars { get { return _fooBars ?? (_fooBars = new List<FooBar>()); } } The first time the property .FooBars is accessed the _fooBars variable will evaluate as null, thus falling through to the assignment statement ass...

Testing a specific method To test a specific method, click the square next to the method definition. Testing all methods To test all methods, click the square next to the class definition. See the testing result If there is a green check next to the definition, the test has succeeded. If the...

To stop the Handler from execution remove the callback attached to it using the runnable running inside it: Runnable my_runnable = new Runnable() { @Override public void run() { // your code here } }; public Handler handler = new Handler(); // use 'new Handler(Looper.get...

In order to call a function through a function pointer, the function pointer's type must exactly match the function's type. Otherwise, the behaviour is undefined. Example: int f(); void (*p)() = reinterpret_cast<void(*)()>(f); p(); // undefined

Configuring the connection programmatically: var config = new ClientConfiguration { Servers = new List<Uri> { new Uri("http://localhost:8091/pools") }, BucketConfigs = new Dictionary<string, BucketConfiguration> ...

OOP - Object Oriented Programming is a vastly used programming paradigm in these days. In OOP, we model real world problems using Objects and there behaviors, in order to solve them, programmatically. There are four main OOP Concepts Inheritance Polymorphism Abstraction Encapsulation These...

To get the time at which your app was installed or updated, you should query Android's package manager. try { // Reference to Android's package manager PackageManager packageManager = this.getPackageManager(); // Getting package info of this application PackageInfo info = pack...

System.assert can be used to check that a boolean expression evaluates to true: System.assert(Service.isActive()); System.assert(!Service.getItems().isEmpty(), 'items should not be empty'); System.assertEquals and System.assertNotEquals can be used to check equality of two values. The expected ...