Tutorial by Examples: ch

Like any other java program, every swing program starts with a main method. The main method is initiated by the main thread. However, Swing components need to be created and updated on the event dispatch thread (or short: EDT). To illustrate the dynamic between the main thread and the EDT take a loo...

Avoid unnecessary operations and method calls wherever you can, especially in a method which is called many times a second, like Update. Distance/Range Checks Use sqrMagnitude instead of magnitude when comparing distances. This avoids unnecessary sqrt operations. Note that when using sqrMagnitude,...

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...

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 ...

Table showing size and values range of all primitive types: data typenumeric representationrange of valuesdefault valuebooleann/afalse and truefalsebyte8-bit signed-27 to 27 - 10-128 to +127short16-bit signed-215 to 215 - 10-32,768 to +32,767int32-bit signed-231 to 231 - 10-2,147,483,648 to +2,147,...

To enable Second Level Caching for Hibernate in WildFly, add this property to your persistence.xml file: <property name="hibernate.cache.use_second_level_cache" value="true"/> You may also enable Query Caching with this property: <property name="hibernate.cache...

By default, Eloquent models expect for the primary key to be named 'id'. If that is not your case, you can change the name of your primary key by specifying the $primaryKey property. class Citizen extends Model { protected $primaryKey = 'socialSecurityNo'; // ... } Now, any Eloqu...

'Declare an array of bytes, assign single-byte character codes, and convert to a string Dim singleByteChars(4) As Byte singleByteChars(0) = 72 singleByteChars(1) = 101 singleByteChars(2) = 108 singleByteChars(3) = 108 singleByteChars(4) = 111 Dim stringFromSingleByteChars As String stringFro...

'Declare an array of bytes, assign multi-byte character codes, and convert to a string Dim multiByteChars(9) As Byte multiByteChars(0) = 87 multiByteChars(1) = 0 multiByteChars(2) = 111 multiByteChars(3) = 0 multiByteChars(4) = 114 multiByteChars(5) = 0 multiByteChars(6) = 108 multiByteChar...

add filter method in RecyclerView.Adapter: public void filter(String text) { if(text.isEmpty()){ items.clear(); items.addAll(itemsCopy); } else{ ArrayList<PhoneBookItem> result = new ArrayList<>(); text = text.toLower...

We can provision remote systems with Ansible. You should have an SSH key-pair and you should take your SSH public key to the machine ~/.ssh/authorized_keys file. The porpuse is you can login without any authorization. Prerequisites: Ansible You need an Inventory file (for ex.: development.ini...

Const baseString As String = "Foo Bar" Dim leftText As String leftText = Left$(baseString, 3) 'leftText = "Foo"

Const baseString As String = "Foo Bar" Dim rightText As String rightText = Right$(baseString, 3) 'rightText = "Bar"

Const baseString As String = "Foo Bar" 'Get the string starting at character 2 and ending at character 6 Dim midText As String midText = Mid$(baseString, 2, 5) 'midText = "oo Ba"

Build.VERSION_CODES is an enumeration of the currently known SDK version codes. In order to conditionally run code based on the device's Android version, use the TargetApi annotation to avoid Lint errors, and check the build version before running the code specific to the API level. Here is an exa...

var directories = [ {name: 'users' , parent : null }, {name: 'distalx' , parent : 'users' }, {name: 'guest' , parent : 'users' }, {name: 'shared' , parent : 'users' }, {name: 'documents' , parent : 'distalx' }, {name: 'music' , parent : 'distalx' }, {name: 'desktop' , parent : '...

Basic Checkboxes export class MyViewModel { favoriteColors = []; colors = ['Red', 'Yellow', 'Pink', 'Green', 'Purple', 'Orange', 'Blue']; } <template> <label repeat.for="color of colors"> <input type="checkbox" value.bind="color" ch...

You can use re.finditer to iterate over all matches in a string. This gives you (in comparison to re.findall extra information, such as information about the match location in the string (indexes): import re text = 'You can try to find an ant in this string' pattern = 'an?\w' # find 'an' either w...

//Swift let initialScreen = storyboard.instantiateInitialViewController() //Objective-c UIViewController *initailScreen = [storyboard instantiateInitialViewController];

//Swift let viewController = storyboard.instantiateViewControllerWithIdentifier("identifier") //Objective-c UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"identifier"];