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What is a stream?
...bat, stdin (standard input), stdout (standard output) and stderr (standard error). Streams can be built as data structures themselves or objects which allows us to perform more complex operations of the data streaming through them, like opening the stream, closing the stream or error checking the fi...
In which case do you use the JPA @JoinTable annotation?
... recent versions of Hibernate refuse to start up by printing the following error:
org.hibernate.AnnotationException:
Associations marked as mappedBy must not define database mappings
like @JoinTable or @JoinColumn
Let's pretend that you have an entity named Project and another entity na...
AngularJS : Initialize service with asynchronous data
...e application may actually work but you will see various unknown providers errors in the console.
– IrishDubGuy
Jul 25 '15 at 19:06
...
When and why would you seal a class?
...to cast a non-sealed class to any random interface, compiler doesn't throw error; but when sealed is used the compiler throws error that it can't convert. Sealed class brings additional code access security.
https://www.codeproject.com/Articles/239939/Csharp-Tweaks-Why-to-use-the-sealed-keyword-on-c...
accepting HTTPS connections with self-signed certificates
... return sf;
} catch (Exception e) {
throw new AssertionError(e);
}
}
}
We have created our custom HttpClient, now we can use it for secure connections. For example when we make a GET call to a REST resource:
// Instantiate the custom HttpClient
DefaultHttpClient clie...
Undefined, unspecified and implementation-defined behavior
...e in a predictable way, even though many C++ compilers will not report any errors in the program!
Let's look at a classic example:
#include <iostream>
int main()
{
char* p = "hello!\n"; // yes I know, deprecated conversion
p[0] = 'y';
p[5] = 'w';
std::cout << p;
}
The...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
...ol Buffers always explicitly encodes fields by numbers, and it is never an error at the library level if there are extra fields, and missing fields are not an error if they are marked optional or explicit. Thus all protocol buffers messages have EXTENSIBILITY IMPLIED.
– Kevin C...
How to use Git Revert
...t is still confusing people (like me)
As a beginner, after some trial and error (more errors than trials) I've got an important point:
git revert requires the id of the commit you want to remove keeping it into your history
git reset requires the commit you want to keep, and will consequentially...
When does invoking a member function on a null instance result in undefined behavior?
...mplies. The rationale says that it should be allowed because "*p is not an error when p is null unless the lvalue is converted to an rvalue." However, that relies on the concept of an "empty lvalue," which is part of the proposed resolution to CWG defect 232, but which has not been adopted. So, wit...
Have Grunt generate index.html for different setups
...Pattern, destPath) {
if (srcPattern === undefined) {
throw new Error("srcPattern undefined");
}
if (destPath === undefined) {
throw new Error("destPath undefined");
}
return grunt.util._.reduce(
grunt.file.expandMapping(srcPattern, destPath, {
...