Tutorial by Examples: v

Vue provides event modifiers for v-on by calling directive postfixes denoted by a dot. .stop .prevent .capture .self .once For examples: <!-- the click event's propagation will be stopped --> <a v-on:click.stop="doThis"></a> <!-- the submit event will no...

Enumerating through Keys foreach ($key in $var1.Keys) { $value = $var1[$key] # or $value = $var1.$key } Enumerating through Key-Value Pairs foreach ($keyvaluepair in $var1.GetEnumerator()) { $key1 = $_.Key1 $val1 = $_.Val1 }

This can be usefull when you want to visualize incoming data in real-time. This data could, for example, come from a microcontroller that is continuously sampling an analog signal. In this example we will get our data from a named pipe (also known as a fifo). For this example, the data in the pipe ...

struct Mathematics { internal func performOperation(inputArray: [Int], operation: (Int)-> Int)-> [Int] { var processedArray = [Int]() for item in inputArray { processedArray.append(operation(item)) } retur...

The code below shows how to perform asynchronous navigation when the app is in a MasterDetailPage context. public async Task NavigateMasterDetail(Page page) { if (page == null) { return; } var masterDetail = App.Current.MainPage as Mas...

Using srcset with sizes <img sizes="(min-width: 1200px) 580px, (min-width: 640px) 48vw, 98vw" srcset="img/hello-300.jpg 300w, img/hello-600.jpg 600w, img/hello-900.jpg 900w, img/hello-1200.jpg 1200w" src="img/hello-900.jpg&quo...

Data types to string formatting Data types like int, float, double, long, boolean can be formatted to string using String.valueOf(). String.valueOf(1); //Output -> "1" String.valueOf(1.0); //Output -> "1.0" String.valueOf(1.2345); //Output -> "1.2345" Stri...

.profile is read by most shells on startup, including bash. However, .bash_profile is used for configurations specific to bash. For general initialization code, put it in .profile. If it's specific to bash, use .bash_profile. .profile isn't actually designed for bash specifically, .bash_profile is...

<RangeSeekBar android:id="@+id/barPrice" android:layout_width="fill_parent" android:layout_height="wrap_content" app:barHeight="0.2dp" app:barHeight2="4dp" app:increment="7" ...

Python import csv with open('/tmp/output.tsv', 'wt') as out_file: tsv_writer = csv.writer(out_file, delimiter='\t') tsv_writer.writerow(['name', 'field']) tsv_writer.writerow(['Dijkstra', 'Computer Science']) tsv_writer.writerow(['Shelah', 'Math']) tsv_writer.writerow(['...

One major aspect of process substitution is that it lets us avoid usage of a sub-shell when piping commands from the shell. This can be demonstrated with a simple example below. I have the following files in my current folder: $ find . -maxdepth 1 -type f -print foo bar zoo foobar foozoo barzoo ...

An artifact built by Maven can be declared as a Maven plugin by specifying the packaging as maven-plugin in the pom.xml. <packaging>maven-plugin</packaging> You need to declare a dependency on the plugin API and annotations. <dependency> <groupId>org.apache.maven&lt...

Contains a read-only hash table (Constant, AllScope) that displays details about the version of PowerShell that is running in the current session. $PSVersionTable #this call results in this: Name Value ---- ----- PSVersion ...

A synchronous producer-consumer solution ensures that the consumer reads every data item written by the producer exactly one time. Asynchronous solutions allow the consumer to sample the output of the producer. Either the consumer consumes the data faster than it is produced, or the consumer consume...

COPY products(is_public, title, discount) TO 'D:\csv_backup\products_db.csv' DELIMITER ',' CSV HEADER; COPY categories(name) TO 'D:\csv_backup\categories_db.csv' DELIMITER ',' CSV HEADER;

COPY products TO 'D:\csv_backup\products_db.csv' DELIMITER ',' CSV HEADER; COPY categories TO 'D:\csv_backup\categories_db.csv' DELIMITER ',' CSV HEADER;

Some applications may want to create so-called "Fire & Forget" tasks which can be periodically triggered and do not need to return any type of value returned upon completion of the assigned task (for example, purging old temp files, rotating logs, autosaving state). In this example, w...

3.3 Instancing can be done via modifications to how vertex attributes are provided to the vertex shader. This introduces a new way of accessing attribute arrays, allowing them to provide per-instance data that looks like a regular attribute. A single instance represents one object or group of vert...

In order to build a good classifier we will often need to get an idea of how the data is structered in feature space. Weka offers a visualisation module that can help. Some dimensions already seperate the classes quite well. Petal-width orders the concept quite neatly, when compared to petal-widt...

It is often necessary to execute a long-running task and use the result of that task once it has completed. In this example, we will create two classes: One which implements the Callable<T> interface (where T is the type we wish to return), and one which contains a main() method. AsyncValueT...