Tutorial by Examples: g

ghcjs can be invoked with the same command line arguments as ghc. The generated programs can be run directly from the shell with Node.js and SpiderMonkey jsshell. for example: $ ghcjs -o helloWorld helloWorld.hs $ node helloWorld.jsexe/all.js Hello world!

For the sake of readability, which will be useful for beginners when reading VB code as well for full time developers to maintain the code, we can use "Region" to set a region of the same set of events, functions, or variables: #Region "Events" Protected Sub txtPrice_TextCh...

$model = Mage::getModel('catalog/product')->getCollection() Filter based on store: $mode->addStoreFilter($storeId) Filter based on product type: $mode->addAttributeToFilter('type_id', 'configurable') $mode->addAttributeToFilter('type_id', 'simple') Filter based on status: $m...

Mage::helper('catalog/image')->init($item->getProduct(), 'thumbnail'); Mage::helper('catalog/image')->init($item->getProduct(), 'small_image'); Mage::helper('catalog/image')->init($item->getProduct(), 'image');

Mage::getModel('catalog/product_media_config')->getMediaUrl($product->getThumbnail()); //Thumbnail Mage::getModel('catalog/product_media_config')->getMediaUrl($product->getSmallImage()); //Small Image Mage::getModel('catalog/product_media_config')->getMediaUrl($product->getImage(...

$rootId = Mage::app()->getStore($storeId)->getRootCategoryId(); $categories = Mage::getModel('catalog/category')->getCollection() ->addAttributeToSelect('*') ->addFieldToFilter('path', array('like'=> "1/$rootId/%")) ->addAttributeToFilter('level', 2...

SET FOREIGN_KEY_CHECKS=0; TRUNCATE `log_customer`; TRUNCATE `log_visitor`; TRUNCATE `log_visitor_info`; TRUNCATE `log_visitor_online`; TRUNCATE `log_quote`; TRUNCATE `log_summary`; TRUNCATE `log_summary_type`; TRUNCATE `log_url`; TRUNCATE `log_url_info`; TRUNCATE `sendfriend_log`; TRUNC...

{-# LANGUAGE RecordWildCards #-} import Text.XML.Light data Package = Package { pOrderNo :: String , pOrderPos :: String , pBarcode :: String , pNumber :: String } -- | Create XML from a Package instance Node Package where node qn Package {..} = node qn [ un...

A static data member of the class may be fully defined within the class definition if it is declared inline. For example, the following class may be defined in a header. Prior to C++17, it would have been necessary to provide a .cpp file to contain the definition of Foo::num_instances so that it wou...

$store = Mage::app()->getStore(); $storeId = Mage::app()->getStore()->getStoreId(); $storeCode = Mage::app()->getStore()->getCode(); $websiteId = Mage::app()->getStore()->getWebsiteId(); $storeGroupId = Mage::app()->getStore()->getGroupId(); $storeName = Mage::app()-&...

Since a signal handler will be called by the kernel using the C calling convention, we must tell the compiler to use the C calling convention when compiling the function. volatile sig_atomic_t death_signal = 0; extern "C" void cleanup(int signum) { death_signal = signum; } int mai...

A C library header can usually be included into a C++ program, since most declarations are valid in both C and C++. For example, consider the following foo.h: typedef struct Foo { int bar; } Foo; Foo make_foo(int); The definition of make_foo is separately compiled and distributed with the...

This simple function can be used to get value from exactly one field one record query result Public Function getDataScalar(ssql As String) openConnection() Try Dim q As New MySqlCommand q.Connection = db q.CommandText = ssql getDataScalar = q.Execut...

import sys from PyQt4.QtCore import * from PyQt4.QtGui import * def window(): app = QApplication(sys.argv) win = QDialog() b1 = QPushButton(win) b1.setText("Button1") b1.move(50,20) b1.clicked.connect(b1_clicked) b2 = QPushButton(win) b2.setText(&quot...

let col_1 = db.collection('col_1'); let col_2 = db.collection('col_2'); col_1 .aggregate([ { $match: { "_id": 1 } }, { $lookup: { from: "col_2", localField: "id", foreignField: "id", ...

go env [var ...] prints go environment information. By default it prints all the information. $go env GOARCH="amd64" GOBIN="" GOEXE="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOOS="darwin" GOPATH="/Users/vikashkv/work" ...

Suppose we want to write a constraint which matches a number, but approximatively. Say, you are supposed to have 95 people in a survey, but 93 or 96 will do as well. We can write a custom constraint of the form: public class AlmostEqualToConstraint : Constraint { readonly int _expected; ...

Users often turn up in a situation when a business process cannot be finished because the user has not entered all the necessary information. An example of this situation is when a user tries to create a drop-ship order with missing customer address. According to UX best practices, the system shou...

The Entity Framework library comes only with an SQL Server provider. To use SQLite will require additional dependencies and configuration. All required dependencies are available on NuGet. Install SQLite Managed Libraries All of the mananged depedencies can be installed using the NuGet Package Man...

After going through the Basic Setup example, you may find yourself repeating most part of it in every single Scala Gradle project. Smells like boilerplate code... What if, instead of applying the Scala plugin offered by Gradle, you could apply your own Scala plugin, which would be responsible for h...