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Why does the arrow (->) operator in C exist?
...th * and . combination
The C language described by CRM was very different from the modern C in many respects. In CRM struct members implemented the global concept of byte offset, which could be added to any address value with no type restrictions. I.e. all names of all struct members had independen...
Java: Calling a super method which calls an overridden method
...he future.
That means there is no direct way to call SuperClass.method2() from SuperClass.method1() without going though SubClass.method2() unless you're working with an actual instance of SuperClass.
You can't even achieve the desired effect using Reflection (see the documentation of java.lang.re...
What are the differences between type() and isinstance()?
...e (since inheritance is so handy, it would be bad to stop code using yours from using it!), so isinstance is less bad than checking identity of types because it seamlessly supports inheritance.
It's not that isinstance is good, mind you—it's just less bad than checking equality of types. The nor...
How do I return NotFound() IHttpActionResult with an error message or exception?
...xecuteAsync(CancellationToken cancellationToken)
{
return Task.FromResult(Execute());
}
public HttpResponseMessage Execute()
{
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.NotFound);
response.Content = new StringContent(Message); // P...
The apk must be signed with the same certificates as the previous version
...e.
How do I check which signing keys were used?
Gather the information from the APK
You can check which certificates the original APK and update APK were signed with by using these commands, using the Java keytool:
keytool -list -printcert -jarfile original.apk
keytool -list -printcert -jarfil...
Why do x86-64 systems have only a 48 bit virtual address space?
...
Where does the 4 come from in the 4 petabytes? If we're talking 64 address lines we should end up with the square of the address space made possible by 32 address lines which is 4 gigabytes. Square that and we should have 16, not 4 petabytes. Am I...
How can I upload files asynchronously?
...rk but there are still clusters of higher usage.
The important take-away from this —whatever the feature— is, check what browser your users use. If you don't, you'll learn a quick and painful lesson in why "works for me" isn't good enough in a deliverable to a client. caniuse is a useful tool ...
How to define custom exception class in Java, the easiest way?
...st set the Superclass field to java.lang.Exception and check "Constructors from superclass" and it will generate the following:
package com.example.exception;
public class MyException extends Exception {
public MyException() {
// TODO Auto-generated constructor stub
}
public ...
WKWebView in Interface Builder
...der *)coder NS_UNAVAILABLE;
which implies that you can't instantiate one from a nib.
You'll have to do it by hand in viewDidLoad or loadView.
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Generic TryParse
...of(T));
if(converter != null)
{
// Cast ConvertFromString(string text) : object to (T)
return (T)converter.ConvertFromString(input);
}
return default(T);
}
catch (NotSupportedException)
{
return default(T);
}
}
...