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Do c++11 lambdas capture variables they don't use?
... odr-used entity is not explicitly captured, then the odr-used entity is said to be implicitly captured.
Your lambda expression has an associated capture default: by default, you capture variables by value using the [=].
If and only if a variable is used (in the One Definition Rule sense of the te...
What is std::string::c_str() lifetime?
...
The c_str() result becomes invalid if the std::string is destroyed or if a non-const member function of the string is called. So, usually you will want to make a copy of it if you need to keep it around.
In the case of your example, it appears that the re...
Are empty HTML5 data attributes valid?
...ple jQuery plugin that displays inline modals under specified elements. My idea is for the script to auto-init based on data attributes specified on elements.
...
How can I add an item to a IEnumerable collection?
...ror details. I'd guess you didn't include System.Linq; at the top of your file, but who knows? Try figuring it out on your own, create a minimum prototype that exhibits the same error if you can't and then ask for help in a question.
– user1228
Jul 23 '13 at ...
How to synchronize a static variable among threads running different instances of a class in Java?
...Test {
private static int count = 0;
public static synchronized void incrementCount() {
count++;
}
}
Explicitly synchronize on the class object.
public class Test {
private static int count = 0;
public void incrementCount() {
synchronized (Test.class) {
...
Using lambda expressions for event handlers
... this:
public partial class MyPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//snip
MyButton.Click += new EventHandler(delegate (Object o, EventArgs a)
{
//snip
});
}
}
...
Reading a string with scanf
...ry pointer. I think the C implementation on the Symbolics "Lisp Machines" did something like this.)
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Cannot pass null argument when using type hinting
...her languages null has the ability to be of any type thus making null a valid argument in this case. 2: Php is using a default value for an argument to specify that null is allowable, this is obscure and it makes a mandatory parameter impossible even if the developer wants to force a null to be expl...
In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...g version 4.1):
The @NotNull constraint is defined as:
@Constraint(validatedBy = {NotNullValidator.class})
This class has an isValid method defined as:
public boolean isValid(Object object, ConstraintValidatorContext constraintValidatorContext) {
return object != null;
}
The @NotEmpt...
Creating a new user and password with Ansible
...as-is in plain text, this means your password hash recorded in your shadow file is wrong. That means when you try to authenticate with your password its hash will never match.
Additionally, see Ansible FAQ regarding some nuances of password parameter and how to correctly use it.
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