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What is a NullReferenceException, and how do I fix it?
...ew Customer();
customer.Name = "John";
}
private void Button_Click(object sender, EventArgs e)
{
MessageBox.Show(customer.Name);
}
}
This can be solved by following the convention to prefix fields with an underscore:
private Customer _customer;
ASP.NET Page...
Rich vs Anemic Domain Model [closed]
...to display list of items to be confirmed by user before they click on save button to persist the Order.
Responding To Comment
This is how I use the domain class from controller:
def save = {
Order order = new Order()
order.addItem(new Item())
order.addItem(new Item())
repository.creat...
How can I get query string values in JavaScript?
... heavily ajax'd app, then you may be using the hash(#) to "enable the back button"... in that case the querystring would change all the time (see how facebook does it)... though these solutions ignore things that come after the # anways...
– Nick Franceschina
J...
Phase • Animations made easy! - Extensions - Kodular Community
...
How to animate a Floating Action Button?
Phase Extension
...
What are the differences between Abstract Factory and Factory design patterns?
...
The Abstract Factory should create more than just Button() to make a "family of related products." For example, the canonical GoF example creates ScrollBar() and Window(). The advantage is that the Abstract Factory can enforce a common theme across its multiple products.
...
What is a Y-combinator? [closed]
...1);
}})(
5
);
Feel free to try it. alert() that return, tie it to a button, whatever.
That code calculates factorials, recursively, without using
assignment, declarations, or functions of 2 variables. (But
trying to trace how it works is likely to make your head spin.
And handing it, without...
How does OAuth 2 protect against things like replay attacks using the Security Token?
...est a secure resource (my gmail contact list) from gmail. So I click this button:
A web page pops up, and it shows the Gmail login page, when I enter my account and password:
Gmail then shows a consent page where I click "Accept":
Now LinkedIn can access my contacts in Gmail:
Below is a flow...
Set focus on TextBox in WPF from view model
I have a TextBox and a Button in my view.
21 Answers
21
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How to detect when cancel is clicked on file input?
...}
else {
/* No file selected or cancel/close
dialog button clicked */
/* If user has select a file before,
when they submit, it will treated as
no file selected */
}
});
...
What is a callback function?
... such that when the parent method is called (whatever condition, such as a button click, a timer tick etc) and its method body completes, the callback function is then invoked.
Some languages support constructs where multiple callback function arguments are supported, and are called based on how th...