Tutorial by Examples: io

Annotations are means of attaching metadata to code. To declare an annotation, put the annotation modifier in front of a class: annotation class Strippable Annotations can have meta-anotations: @Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION, AnnotationTarget.VALUE_PARAMETER, A...

// get existing collections $orders = Mage::getModel('sales/order')->getCollection(); $products = Mage::getModel('catalog/product')->getCollection(); $customers = Mage::getModel('customer/customer')->getCollection();

// $orders is collection $orders->addAttributeToSelect('status'); // get status attribute $orders->addAttributeToSelect('*'); // get all attributes

Let's say you've got a table of loans, and another related table of parcels, where each loan can have one or more parcels associated with it. If you want a query to show each loan and a list of all its associated parcels, but you only want each loan to show up once, then you could use something lik...

You might have realized that $emit is scoped to the component that is emitting the event. That's a problem when you want to communicate between components far from one another in the component tree. Note: In Vue1 you coud use $dispatch or $broadcast, but not in Vue2. The reason being that it doesn'...

A processing instruction is used to directly pass on some information or instruction to the application via the parser. <?my-application some instructions ?> The token after the initial question mark (here my-application) is called the target and identifies the application at which the ins...

Example of Receiver Operating Characteristic (ROC) metric to evaluate classifier output quality. ROC curves typically feature true positive rate on the Y axis, and false positive rate on the X axis. This means that the top left corner of the plot is the “ideal” point - a false positive rate of zero...

In most cases, the range_lookup is used as FALSE (an exact match). The default for this parameter is TRUE - it is less commonly used in this form, but this example shows one usecase. A supermarket gives a bonus based on the customers monthly spend. If the customer spends 250 EUR or more in a mon...

Simple, Inline Equations You can do a simple inline equation by using $an equation here$. For example, you might do $\lim\limits_{n \to \infty} \frac{1}{2^n} i\bar z$ which, if we put a little fake text around it, gives Numbered, Centered Equations When writing papers or other documents, ...

Possible values are Continue | Ignore | Inquire | SilentlyContinue | Stop | Suspend. Value of this parameter will determine how the cmdlet will handle non-terminating errors (those generated from Write-Error for example; to learn more about error handling see [topic not yet created]). Default valu...

This is a simple implementation of Binary Search Tree Insertion using Python. An example is shown below: Following the code snippet each image shows the execution visualization which makes it easier to visualize how this code works. class Node: def __init__(self, val): self.l_chil...

TikZ provides syntax similar to DOT which you can use to tighten up your graph drawing code considerably. \documentclass{standalone} \usepackage{tikz} \usetikzlibrary{graphs,quotes,arrows.meta} \begin{document} \begin{tikzpicture} \graph[nodes={draw,circle},edges={-{Stealth[]}}] { ...

ls shows files and directories in present working directory. (if no arguments are passed.) (It doesn't show hidden files which starts with . by default.) user@ubuntu14:/usr$ ls bin games include lib lib32 local sbin share src To see all files (hidden files/folders also). Use ls -a OR l...

The state of an object at a given time is represented by the information that it holds at that point. In an OO language, the state is implemented as member variables. In a properly designed object, the state can be changed only by means of calls to its methods and not by direct manipulation of its ...

This type of Hook can be used to override core portal (e.g c/portal/login) and portlet struts actions (e.g /login/forgot_password), this actions for Liferay Portal are specified in a struts-config.xml file in its WEB-INF folder.To override an action: in liferay-hook.xml file of your hook plugin u...

h = 1.0 / n; #pragma omp parallel for private(x) shared(n, h) reduction(+:area) for (i = 1; i <= n; i++) { x = h * (i - 0.5); area += (4.0 / (1.0 + x*x)); } pi = h * area; In this example, each threads execute a subset of the iteration count. Each thread has its local private copy ...

h = 1.0 / n; #pragma omp parallel for private(x) shared(n, h, area) for (i = 1; i <= n; i++) { x = h * (i - 0.5); #pragma omp critical { area += (4.0 / (1.0 + x*x)); } } pi = h * area; In this example, each threads execute a subset of the iteration count and they accumul...

h = 1.0 / n; #pragma omp parallel for private(x) shared(n, h, area) for (i = 1; i <= n; i++) { x = h * (i - 0.5); #pragma atomic area += (4.0 / (1.0 + x*x)); } pi = h * area; In this example, each threads execute a subset of the iteration count and they accumulate atomically int...

h = 1.0 / n; #pragma omp parallel private(x) shared(n, h) { double thread_area = 0; // Private / local variable #pragma omp for for (i = 1; i <= n; i++) { x = h * (i - 0.5); thread_area += (4.0 / (1.0 + x*x)); } #pragma omp atomic ...

Animating Background color of stacklayout on tapping button pages/main.component.ts import {Component, ElementRef, ViewChild} from "@angular/core"; import {Color} from "color"; import {View} from "ui/core/view"; @Component({ selector: "main&quot...