Tutorial by Examples: d

Pair allows us to treat two objects as one object. Pairs can be easily constructed with the help of template function std::make_pair. Alternative way is to create pair and assign its elements (first and second) later. #include <iostream> #include <utility> int main() { std::p...

The example Checking a string for unwanted characters, describes how to test and reject strings that don't meet certain criteria. Obviously, rejecting input outright is not always possible, and sometimes you just have to make do with what you receive. In these cases, a cautious developer will attemp...

In this example we are going to create a directive to copy a text into the clipboard by clicking on an element copy-text.directive.ts import { Directive, Input, HostListener } from "@angular/core"; @Directive({ selector: '[text-copy]' }) export class TextCopyDir...

Launch debug by clicking on the "beetle" icon: Debug window is now waiting instructions for next step: You can go to the next step by clicking F9 in the debug window or by clicking on the green arrow:

The input element with a type attribute whose value is "datetime" represents a control for setting the element’s value to a string representing a global date and time (with timezone information). <fieldset> <p><label>Meeting time: <input type=datetime name="m...

For now I think the catalog module contains almost everything you can add to a module. Api - Contains the service contracts. A set of interfaces that should not be changed unless the minor version changes. Not mandatory for a custom module but nice to have for comercial extensions. Data - Data...

GNU Emacs uses a special format for documentation: info. The Common Lisp standard has been converted to the Texinfo format, which can be used to create documentation browsable with the info reader in GNU Emacs. See here: dpans2texi.el converts the TeX sources of the draft ANSI Common Lisp standard...

While being better in many regards, the new connection syntax in Qt5 has one big weakness: Connecting overloaded signals and slots. In order to let the compiler resolve the overloads we need to use static_casts to member function pointers, or (starting in Qt 5.7) qOverload and friends: #include &lt...

The axis offsets for drawing the marker that are specified by refX and refY are applied before the rotation specified by the orient parameter. Below you can see the effects of various combinations of orient and refX, refY to illustrate this. <svg width="800px" height="600px"&...

The default for drawing markers is to use the stroke width of the calling element, but you can explicitly specify that markers be drawn using the unit system for the element the marker is being applied to by specifying markerUnits="userSpaceOnUse". Markers are drawn into a 3x3 markerUnits ...

Elements can specify start, mid and end markers separately. Below are examples of start, mid and end markers for all elements that can be marked. Please note that Chrome does not currently (July 2016) calculate auto orientation correctly for start and end markers for polygons (bug# 633012), and also...

add below dependencies to build.gradle file in dependency section. (this is an unOfficial library for date picker) compile 'com.wdullaer:materialdatetimepicker:2.3.0' Now we have to open DatePicker on Button click event. So create one Button on xml file like below. <Button ...

Creating Hadoop User: sudo addgroup hadoop Adding a user: sudo adduser --ingroup hadoop hduser001 Configuring SSH: su -hduser001 ssh-keygen -t rsa -P "" cat .ssh/id rsa.pub >> .ssh/authorized_keys Note: If you get errors [bash: .ssh/authorized_keys: No such file or di...

in styles.xml add your custom style: <?xml version="1.0" encoding="utf-8"?> <resources> <style name="AppBaseTheme" parent="@android:style/Theme.Light.NoTitleBar.Fullscreen"> </style> </resources> Create your custom...

A drawable can be tinted a certain color. This is useful for supporting different themes within your application, and reducing the number of drawable resource files. Using framework APIs on SDK 21+: Drawable d = context.getDrawable(R.drawable.ic_launcher); d.setTint(Color.WHITE); Using android...

Notepad++ provides 2 types of features for auto-completion and suggestions: Auto-completion that reads the open file and provide suggestion of words and/or functions within the file Suggestion with the arguments of functions (specific to the language) To enable it, you need to change a settin...

ODS (on-disk structure) version is a number representing version of the database low-level data layout structure (ODS). When a new feature is added to Firebird it might or might not require the structure of database pages or system tables (database metadata) to change. If it does, the ODS version mu...

For some use cases, you can use the using syntax to help define a custom scope. For example, you can define the following class to execute code in a specific culture. public class CultureContext : IDisposable { private readonly CultureInfo originalCulture; public CultureContext(string ...

UISplitViewController needs to the root view controller of your app’s window AppDelegate.m - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] self.window.ba...

Copy the package installer unit file to /etc where changes will not be overwritten on an upgrade: cp /lib/systemd/system/docker.service /etc/systemd/system/docker.service Update /etc/systemd/system/docker.service with your options on ExecStart: ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0...