Tutorial by Examples: ctl

$productFound = ($product->getId() !== null)

This is a relatively common mistake: You created an rect element, in a bar chart for instance, and you want to add a text label (let's say, the value of that bar). So, using the same variable that you used to append the rect and define its x and y position, you append your text element. Very logic, ...

This is the image of project structure in Android studio: This is the image of project structure of nativescript project: As you see they are same. so we can write java code in nativescript as we write in android studio. We want to Add Toast to the default app of nativescript. after creating...

We want to add Toast to nativescript default app. import {Component} from "@angular/core"; let application = require("application"); declare var android:any; @Component({ selector: "my-app", templateUrl: "app.component.html", }) export clas...

It is convenient to set custom conditional preprocessing at project level when some actions need to be skipped lets say for tests. Go to Solution Explorer -> Click Right Mouse on project you want to set variable to -> Properties -> Build -> In General find field Conditional compilation ...

To use SQL syntax with model, that would transfer result to proper instantions, you should use directly one of Phalcon\Mvc\Model\Resultset classes: $users = new \Application\Models\Users(); // bitwise operation on `flag` field $sql = 'SELECT * FROM phorum.users WHERE (15 & (1 <&...

You can create extension methods to improve usability for nested collections like a Dictionary with a List<T> value. Consider the following extension methods: public static class DictListExtensions { public static void Add<TKey, TValue, TCollection>(this Dictionary<TKey, TColl...

private static final String TAG = "IntentBitmapFetch"; private static final String COLON_SEPARATOR = ":"; private static final String IMAGE = "image"; @Nullable public Bitmap getBitmap(@NonNull Uri bitmapUri, int maxDimen) { InputStream is = context.getConten...

vagrant ssh-config >> ~/.ssh/config ssh default

At its core a perceptron model is one of the simplest supervised learning algorithms for binary classification. It is a type of linear classifier, i.e. a classification algorithm that makes its predictions based on a linear predictor function combining a set of weights with the feature vector. A ...

QObjects come with their own alternative lifetime concept compared to native C++'s raw,unique or shared pointers. QObjects have the possibility to build an objecttree by declaring parent/child relationships. The simplest way to declare this relationship is by passing the parent object in the const...

A Kubernetes cluster is controlled using the kubectl command. The method of configuring kubectl depends on where Kubernetes is installed. Google Cloud (Container Engine) To install kubectl using the Google Cloud SDK: gcloud components install kubectl To configure kubectl to control an existing...

After you have a running cluster you can manage it with the kubectl command. Most of the commands you can get with the kubectl --help command, but I show you the most common commands, for manage and getting info about your cluster, nodes, pods, services and labels. For getting information about t...

add the following function into .bash_profile, save and exit function wekaflstart() { export R_HOME=/Library/Frameworks/R.framework/Resources java -Xss10M -Xmx4096M -cp :weka.jar weka.gui.knowledgeflow.KnowledgeFlow "$1" } inside a directory with a weka.jar file, open its termin...

For simple cases, you can filter data directly. a = np.random.normal(size=10) print(a) #[-1.19423121 1.10481873 0.26332982 -0.53300387 -0.04809928 1.77107775 # 1.16741359 0.17699948 -0.06342169 -1.74213078] b = a[a>0] print(b) #[ 1.10481873 0.26332982 1.77107775 1.16741359 0.176999...

// PHYSICS CONSTANTS struct PhysicsCategory { static let None : UInt32 = 0 static let All : UInt32 = UInt32.max static let player : UInt32 = 0b1 // 1 static let bullet : UInt32 = 0b10 // 2 } var nodesToRemove = [SKNode]() /...

It's common practice in JavaScript to pass object literals to functions: // JavaScript printOptions({responsive: true}); Unfortunately we cannot pass Dart Map objects to JavaScript in these cases. What we have to do is create a Dart object that represents the object literal and contains all of...

Throwable has two direct subclasses, Exception and Error. While it's possible to create a new class that extends Throwable directly, this is inadvisable as many applications assume only Exception and Error exist. More to the point there is no practical benefit to directly subclassing Throwable, as ...

a simple yet very useful command: :g/ending/m$ moves lines containing ending to the end of the buffer. m means move $ means end of buffer, while 0 means beginning of buffer.

Often you want to lock the entire object while you perform multiple operations on it. For example, if you need to examine or modify the object using iterators. Whenever you need to call multiple member functions it is generally more efficient to lock the whole object rather than individual member fu...