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Can we instantiate an abstract class?
...mous subclass.
Emphasis mine.
Also, in JLS - Section # 12.5, you can read about the Object Creation Process. I'll quote one statement from that here: -
Whenever a new class instance is created, memory space is allocated
for it with room for all the instance variables declared in the clas...
Generating a unique machine id
...
@Smith My goal was a small 8 character id. Reading the spec, I made decisions about which fields might vary and excluded them. Then over many years I trimmed out more fields that are not constants from machines. Finally, I ended up storing an encrypted copy of the ra...
How to paste yanked text into the Vim command line
...nix) or NUL (Windows), you can write to it but it's discarded and when you read from it, it is always empty),
- (small delete register),
/ (search pattern register, updated when you look for text with /, ?, * or # for instance; you can also write to it to dynamically change the search pattern),
: (s...
How are Anonymous inner classes used in Java?
...
Very well explained, even tough I would suggest anyone reading this to look up and see what java 8 and lambda expressions can do to make coding quicker and more readable.
– Pievis
Mar 27 '14 at 20:26
...
How is an HTTP POST request made in node.js?
... post_req.write(post_data);
post_req.end();
}
// This is an async file read
fs.readFile('LinkedList.js', 'utf-8', function (err, data) {
if (err) {
// If this were just a small part of the application, you would
// want to handle this differently, maybe throwing an exception
// for...
Scope of sessionStorage and localStorage
I read some documentation on sessionStorage and localStorage, but I don't understand what the scope is: the domain, a specific page?
...
Catch Ctrl-C in C
... rules that need to be obeyed in order not to break something else. Please read the comments below.
The sample code from above:
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
void INThandler(int);
int main(void)
{
signal(SIGINT, INThandler);
while ...
How do I map lists of nested objects with Dapper
...(m => m.LocationId).Distinct()}
);
Map it all up
Leaving this to the reader, you create a few maps and iterate through your courses populating with the locations.
Caveat the in trick will work if you have less than 2100 lookups (Sql Server), if you have more you probably want to amend the qu...
How would Git handle a SHA-1 collision on a blob?
...lucky: one of the blobs ends up having the same SHA-1 as another that is already in your repository. Question is, how would Git handle this? Simply fail? Find a way to link the two blobs and check which one is needed according to the context?
...
unique object identifier in javascript
...s a __objectID__ property, and by defining it as a hidden (non-enumerable) read-only property if not.
So it is safe against any attempt to change or redefine the read-only obj.__objectID__ property after it has been defined, and consistently throws a nice error instead of silently fail.
Finally, i...