You can configure the database settings in config/connections.js.
Here's an example:
postgresql: {
database: 'databaseName',
host: 'localhost',
user: 'root',
password: '',
port: 5432,
poolSize: 10,
ssl: false
};
Alternatively, you can supply the connection information in U...
Short circuiting is a functionality that skips evaluating parts of a (if/while/...) condition when able.
In case of a logical operation on two operands, the first operand is evaluated (to true or false) and if there is a verdict (i.e first operand is false when using &&, first operand is tr...
OSX
Implement the contract of the role-specific protocol (NSAccessibilityButton, NSAccessibilityImage, NSAccessibilityGroup, etc) within the NSAccessibility protocol that best matches the behavior of the GUI element being rendered.
Linux / BSD
For GNOME applications, the GNOME Accessibility Impl...
The most common way is to apply the extension via Config. Example:
# File: mysite/_config/config.yml
Member:
extensions:
- MyMemberExtension
The extensions config variable is of type "array", so you can add multiple extensions like this:
# File: mysite/_config/config.yml
Mem...
Some procedures have optional arguments. Optional arguments always come after required arguments, but the procedure can be called without them.
For example, if the function, ProcedureName were to have two required arguments (argument1, argument2), and one optional argument, optArgument3, it could b...
This example will call the windows calculator. It's important to notice that the exit code will vary accordingly to the program/script that is being called.
package process.example;
import java.io.IOException;
public class App {
public static void main(String[] args) {
try {
...
Though the transaction class method is called on some ActiveRecord class, the objects within the transaction block need not all be instances of that class. This is because transactions are per-database connection, not per-model.
In this example a balance record is transactionally saved even though ...
A transaction acts on a single database connection. If you have multiple class-specific databases, the transaction will not protect interaction among them. One workaround is to begin a transaction on each class whose models you alter:
Student.transaction do
Course.transaction do
course.enro...
Both #save and #destroy come wrapped in a transaction that ensures that whatever you do in validations or callbacks will happen under its protected cover. So you can use validations to check for values that the transaction depends on or you can raise exceptions in the callbacks to rollback, includin...
ActiveRecord::Base.transaction uses the ActiveRecord::Rollback exception to distinguish a deliberate rollback from other exceptional situations. Normally, raising an exception will cause the .transaction method to rollback the database transaction and pass on the exception. But if you raise an Activ...
Using NuGet
Install-Package Cirrious.FluentLayout
An expanded example based on the starter example at the GitHub Page, a simple first name, last name labels and fields all stacked one on top of the other:
public override void ViewDidLoad()
{
//create our labels and fields
var firstNa...
Built-in functionals: lapply(), sapply(), and mapply()
R comes with built-in functionals, of which perhaps the most well-known are the apply family of functions. Here is a description of some of the most common apply functions:
lapply() = takes a list as an argument and applies the specified ...
User-defined functionals
Users can create their own functionals to varying degrees of complexity. The following examples are from Functionals by Hadley Wickham:
randomise <- function(f) f(runif(1e3))
lapply2 <- function(x, f, ...) {
out <- vector("list", length(x...
Sometimes in a development or testing environment, the SSL certificate chain might not have been fully established (yet).
To continue developing and testing, you can turn off SSL verification programmatically by installing an "all-trusting" trust manager:
try {
// Create a trust mana...
Emacs uses the terms point, mark, and region to provide more precision about the selected text and position of the cursor. By understanding these terms, it'll help you understand and use other operations and functions.
The point is the place in a buffer where editing (i.e. insertion) is currently t...
Download
Use Firebird site to download the correct "server package" for your system.
First, select the version of Firebird that you would like to install.
Next, select the appropriated installer for your system. Example, for almost any version of Windows 32 bits, you would select under ...
The Scala Collections framework, according to its authors, is designed to be easy to use, concise, safe, fast, and universal.
The framework is made up of Scala traits that are designed to be building blocks for creating collections. For more information on these building blocks, read the official S...
