Tutorial by Examples: ar

Use appearanceWhenContainedInInstancesOfClasses: to customize the appearance for instance of a class when contained within an instance of container class. For example customization of UILabel's textColor and backgroundColor within ViewController class will look like this: Set UILabel text color Sw...

Not everyone agrees on what the most semantically correct method for resource creation is. Thus, your API could accept POST or PUT requests, or either. The server should respond with 201 Created if the resource was successfully created. Pick the most appropriate error code if it was not. For examp...

Editing or updating a resource is a common purpose for APIs. Edits can be achieved by sending either POST, PUT or PATCH requests to the respective resource. Although POST is allowed to append data to a resource's existing representation it is recommended to use either PUT or PATCH as they convey a m...

Another common use of HTTP APIs is to delete an existing resource. This should usually be done using DELETE requests. If the deletion was successful, the server should return 200 OK; an appropriate error code if it was not. If our employee Charlie Smith has left the company and we now want to dele...

A cross-origin request must be sent including the Origin header. This indicates from where the request originated. For example, a cross-origin request from http://example.com to http://example.org would look like this: GET /cors HTTP/1.1 Host: example.org Origin: example.com The server will us...

Mostly you will use "normal variables": set(VAR TRUE) set(VAR "main.cpp") set(VAR1 ${VAR2}) But CMake does also know global "cached variables" (persisted in CMakeCache.txt). And if normal and cached variables of the same name exist in the current scope, normal var...

The scope outside of any function or class is the global scope. When a PHP script includes another (using include or require) the scope remains the same. If a script is included outside of any function or class, it's global variables are included in the same global scope, but if a script is include...

A Regexp can be created in three different ways in Ruby. using slashes: / / using %r{} using Regex.new #The following forms are equivalent regexp_slash = /hello/ regexp_bracket = %r{hello} regexp_new = Regexp.new('hello') string_to_match = "hello world!" #All of th...

Superglobal variables are defined by PHP and can always be used from anywhere without the global keyword. <?php function getPostValue($key, $default = NULL) { // $_POST is a superglobal and can be used without // having to specify 'global $_POST;' if (isset($_POST[$key])) { ...

Static class properties that are defined with the public visibility are functionally the same as global variables. They can be accessed from anywhere the class is defined. class SomeClass { public static int $counter = 0; } // The static $counter variable can be read/written from anywhere...

Extra care should be taken when accessing serialized fields in a ScriptableObject instance. If a field is marked public or serialized through SerializeField, changing its value is permanent. They do not reset when exiting playmode like MonoBehaviours do. This can be useful at times, but it can also...

preg_match can be used to parse string using regular expression. The parts of expression enclosed in parenthesis are called subpatterns and with them you can pick individual parts of the string. $str = "<a href=\"http://example.org\">My Link</a>"; $pattern = "/...

You can set or increase memory usage limits (or other JVM arguments) used for Gradle builds and the Gradle Daemon by editing $GRADLE_USER_HOME/.gradle/gradle.properties (~/.gradle/gradle.properties by default), and setting org.gradle.jvmargs. To configure these limits only for a specific project, e...

VBA syntax requires that a string-literal appear within " marks, so when your string needs to contain quotation marks, you'll need to escape/prepend the " character with an extra " so that VBA understands that you intend the "" to be interpreted as a " string. 'The fol...

Const appName As String = "The App For That"

Dim surname As String 'surname can accept strings of variable length surname = "Smith" surname = "Johnson"

'Declare and assign a 1-character fixed-width string Dim middleInitial As String * 1 'middleInitial must be 1 character in length middleInitial = "M" 'Declare and assign a 2-character fixed-width string `stateCode`, 'must be 2 characters in length Dim stateCode As String * 2 stateC...

'Declare, dimension and assign a string array with 3 elements Dim departments(2) As String departments(0) = "Engineering" departments(1) = "Finance" departments(2) = "Marketing" 'Declare an undimensioned string array and then dynamically assign with 'the results...

VBA offers a Mid function for returning substrings within a string, but it also offers the Mid Statement which can be used to assign substrings or individual characters withing a string. The Mid function will typically appear on the right-hand-side of an assignment statement or in a condition, but ...

Function to customize snackbar public static Snackbar makeText(Context context, String message, int duration) { Activity activity = (Activity) context; View layout; Snackbar snackbar = Snackbar .make(activity.findViewById(android.R.id.content), message, d...