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How to implement the factory method pattern in C++ correctly
...the only thing that's left, and that includes smart pointers too. In other words, factories are most useful when used with dynamic allocation, so you can do things like this:
class Abstract {
public:
virtual void do() = 0;
};
class Factory {
public:
Abstract *create();
};
Factory f;
A...
How to send data to local clipboard from a remote SSH session
...he clipboard of the local computer (the name or IP of "desktop"). In other words, it uses nested ssh: you're connected to the remote computer via one ssh session, you execute the command there, and the remote computer connects to your desktop via a different ssh session and puts the text to your cli...
What is the difference between JDK and JRE?
...VM = Class loader system + runtime data area + Execution Engine.
In other words if you are a Java programmer you will need JDK in your system and this package will include JRE and JVM as well but if you are normal user who like to play online games then you will only need JRE and this package will ...
Automatically plot different colored lines
...TLAB Central File File Exchange. It is best described in the author's own words:
This function generates a set of colors which are distinguishable by reference to the "Lab" color space, which more closely matches human color perception than RGB. Given an initial large list of possible colors, i...
TCP vs UDP on video stream
...sn't care about network transport layer drops.
FYI, please don't use the word "packages" when describing networks. Networks send "packets".
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How to cherry pick a range of commits and merge into another branch?
...reak
done
But anyway, when you need to "replay" a range of commits, the word "replay" should push you to use the "rebase" feature of Git.
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Synchronization vs Lock
...d do most everything I needed with my old claw hammer (the synchronized keyword), but it was awkward to use in some situations. Several of those awkward situations became much simpler once I added more tools to my toolbox: a rubber mallet, a ball-peen hammer, a prybar, and some nail punches. However...
Set a persistent environment variable from cmd.exe
... be able to just type `keyz` at the prompt
:: after changes because the word `keys` is already taken in Windows.
@echo off
:: set for the current window
set APCA_API_KEY_ID=key_id
set APCA_API_SECRET_KEY=secret_key
set APCA_API_BASE_URL=https://paper-api.alpaca.markets
:: setx also for other w...
Thread pooling in C++11
...threads means that all your threads are running, all the time – in other words, the thread function never returns. To give the threads something meaningful to do, you have to design a system of inter-thread communication, both for the purpose of telling the thread that there's something to do, as ...
When do you use map vs flatMap in RxJava?
...'s begin.
Observable<LoginResponse> login(String email, String password);
Observable<UserInfo> fetchUserInfo(String userId);
Here are two methods, one for login returned Response, and another for fetching user info.
login(email, password)
.flatMap(response ->
...