It is very common for C functions to accept pointers to other functions as arguments. Most popular example is setting an action to be executed when a button is clicked in some GUI toolkit library. It is possible to pass Haskell functions as C callbacks.
To call this C function:
void event_callback...
Each standard Oracle error is associated with an error number. Its important to anticipate what could go wrong in your code. Here for a connection to another database it can be:
-28000 account is locked
-28001 password expired
-28002 grace period
-1017 wrong user / password
Here is a way to...
Interceptors are a good tool for implementing cross-cutting concerns such as logging or authentication. Let's say we have a following service:
public interface IService
{
string CreateOrder(NetworkCredential credentials, Order orderToCreate);
string DeleteOrder(NetworkCredential credenti...
For registration like this:
var container = new WindsorContainer();
container.Register(
Component.For<FirstInterceptor>(),
Component.For<SecondInterceptor>(),
Component.For<ThirdInterceptor>(),
Component.For<IService>()
.ImplementedBy<Servi...
The following 4 properties are available for PXSelector and PXSegmentMask input controls to define size range for a drop-down window:
MinDropWidth: gets or sets the minimum drop-down control width
MinDropHeight: gets or sets the minimum drop-down control height
MaxDropWidth: gets or sets the ma...
Interceptors are registered like regular components in Windsor. Like other components, they can depend on another components.
With following service for validating credentials:
public interface ICredentialsVerifier
{
bool IsAuthorizedForService(NetworkCredential credentials);
}
public cl...
Create a new bot in Azure following this documentation
Login into Azure and from Intelligence + Analytics category, select Bot Service and provide required information.
Enter the required details for the bot, they are identical to the required details of an App Service,for example App Name, Subs...
Given that the data directory of the server is empty:
The server is initialized.
SSL certificate and key files are generated in the data directory.
The validate_password plugin is installed and enabled.
The superuser account 'root'@'localhost' is created. The password for the superuser is set ...
To reveal the default "root" password:
shell> sudo grep 'temporary password' /var/log/mysqld.log
Change the root password as soon as possible by logging in with the generated temporary password and set a custom password for the superuser account:
shell> mysql -uroot -p
mysql...
Keychain allows to save items with special SecAccessControl attribute which will allow to get item from Keychain only after user will be authenticated with Touch ID (or passcode if such fallback is allowed). App is only notified whether the authentication was successful or not, whole UI is managed b...
Below code represents an example of Opt-Out approach using Serializable and NonSerialized attributes.
/// <summary>
/// Represents a student.
/// </summary>
[Serializable]
public class Student
{
/// <summary>
/// Gets or sets student number.
/// </summary>...
This will be our example data frame:
df = pd.DataFrame({"color": ['red', 'blue', 'red', 'blue']},
index=[True, False, True, False])
color
True red
False blue
True red
False blue
Accessing with .loc
df.loc[True]
color
True red
True red
...
This example will demonstrate how to get started with Firebase in your web apps with JavaScript.
We are going to add a text child in our Firebase Database and display it in realtime on our web app.
Lets get started.
Go to the Firebase Console - https://console.firebase.google.com and create a...
Sometimes, we have to take input from users which should contain only alpha numeric characters.
For example, lets say a Username system which allow only letters and numbers,
Then this can be done with the following Regular Expression
^[a-zA-Z0-9]+$
^ is restrict the start
[a-zA-Z0-9]+ is th...
