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How to center an element, column, or content inside a column works differently in Bootstrap 4. Horizontal Center text-center is still used for display:inline elements mx-auto replaces center-block to center display:block elements offset-* or mx-auto can be used to center grid columns mx-aut...

cx_Freeze - a tool can package your project to excutable/installer after install it by pip, to package demo.py, we need setup.py below. import sys from cx_Freeze import setup, Executable # Dependencies are automatically detected, but it might need fine tuning. build_exe_options = { &...

HeroChildComponent has two input properties, typically adorned with @Input decorations. import { Component, Input } from '@angular/core'; import { Hero } from './hero'; @Component({ selector: 'hero-child', template: ` <h3>{{hero.name}} says:</h3> <p>I, {{hero.nam...

The @HostBinding decorator allows us to programatically set a property value on the directive's host element. It works similarly to a property binding defined in a template, except it specifically targets the host element. The binding is checked for every change detection cycle, so it can change dyn...

Occasionally it's useful to assign one or more ports manually vs using the defaults. Doing so can solve port availability/permissions issues or accommodate running more than one ember instance at a time. To have ember-cli attempt to identify and assign an available port, use: ember serve --port ...

In Sprite-Kit, there is the concept of collisions which refers to the SK physics engine handling how physics objects interact when they collide i.e. which ones bounce off which other ones. It also has the concept of contacts, which is the mechanism by which your program gets informed when 2 physics...

Animation below shows what is happening when you use IDataInput interface methods to access data form ByteArray and other classes which implement this interface.

You'll often want to assign something to an object if it is None, indicating it has not been assigned. We'll use aDate. The simplest way to do this is to use the is None test. if aDate is None: aDate=datetime.date.today() (Note that it is more Pythonic to say is None instead of == None.) ...

Getting set up to use webdev takes some time, if you're doing anything more than tweaking a bit of text. Here are the initial setup steps: $ mkdir site $ cd site $ git clone [email protected]:dart-lang/site-webdev.git $ source ./scripts/env-set.sh $ ./scripts/install-dart-sdk.sh $ ./s...

It is very common for C functions to accept pointers to other functions as arguments. Most popular example is setting an action to be executed when a button is clicked in some GUI toolkit library. It is possible to pass Haskell functions as C callbacks. To call this C function: void event_callback...

Run-time memory management with Rc can be very useful, but it can also be difficult to wrap one's head around, especially if your code is very complex and a single instance is referenced by tens or even hundreds of other types in many scopes. Writing a Drop trait that includes println!("Droppi...

Background To get the product of a register and a constant and store it in another register, the naïve way is to do this: imul ecx, 3 ; Set ecx to 5 times its previous value imul edx, eax, 5 ; Store 5 times the contend of eax in edx Use lea Multiplications are expensive operation...

There's two ways to create a ByteBuffer, where one can be subdivided again. If you have an already existing byte[], you can "wrap" it into a ByteBuffer to simplify processing: byte[] reqBuffer = new byte[BUFFER_SIZE]; int readBytes = socketInputStream.read(reqBuffer); final ByteBuffer ...

Given a ByteBuffer instance one can write primitive-type data to it using relative and absolute put. The striking difference is that putting data using the relative method keeps track of the index the data is inserted at for you, while the absolute method always requires giving an index to put the d...

In modern Objective C syntax you can get values from NSArray and NSDictionary containers using container subscripting. Old way: NSObject *object1 = [array objectAtIndex:1]; NSObject *object2 = [dictionary objectForKey:@"Value"]; Modern way: NSObject *object1 = array[1]; NSObject *o...

To enable Pull to Refresh in a ListView in Xamarin, you first need to specify that it is PullToRefresh enabled and then specify the name of the command you want to invoke upon the ListView being pulled: <ListView x:Name="itemListView" IsPullToRefreshEnabled="True" RefreshComm...

For this example I have a controlled room with a single BLE device enable. Your class should extend CBCentralManagerDelegate. Implement the method: centralManagerDidUpdateState(_ central: CBCentralManager). Use global queue to not freeze the screen while searching for a device. Instantiate CBC...

HTML : <li class="item" ng-repeat="schedule in Schedules | filter:scheduleSearch | limitTo:numberOfItemsToDisplay"> Display some data </li> <ion-infinite-scroll on-infinite="addMoreItem()" ng-if="Schedules.length > numberOfItemsToDisplay&...

Open your jenkins instance script console http://yourJenkins:port/script following is an example for how to get information about a sepcific job. copy the code to the console, change the jobName to the required job and click "Run". /*This script shows how to get basic information about a...

Here Is basic build file to build executable from electron windows app. var electronInstaller = require('electron-winstaller'); var resultPromise = electronInstaller.createWindowsInstaller({ appDirectory: 'Your_electron_application_path', authors: 'Author Name', description: "D...