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Super-simple example of C# observer/observable with delegates
I recently started digging into C# but I can't by my life figure out how delegates work when implementing the observer/observable pattern in the language.
...
Split string with delimiters in C
...==.
For that pattern to work, token and str both have type char *. If you started with a string literal, then you'd want to make a copy of it first:
// More general pattern:
const char *my_str_literal = "JAN,FEB,MAR";
char *token, *str, *tofree;
tofree = str = strdup(my_str_literal); // We own s...
A gentle tutorial to Emacs/Swank/Paredit for Clojure
... counterpart), clojure-mode, Paredit and, of course, the Clojure jar for a start, then perhaps some extras among which Leiningen would perhaps be the most notable. Once you do set it all up, you'll have -- within Emacs -- all the workflow / editing features you mention in the question.
Basic setup:...
What are Java command line options to set to allow JVM to be remotely debugged?
... the agent is selecting a random port number. This might be useful if you start multiple nodes within the same java command line.
– asbachb
Jul 1 at 14:57
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When someone writes a new programming language, what do they write it IN?
...programs from disk files or punch cards. You flicked another switch and it started the program running. When I went to university in the 80's I saw computers that had that capacity but never was given the job of loading in a program with the switches.
And even earlier than that computer programs ha...
How can I get zoom functionality for images?
...;
int mode = NONE;
// Remember some things for zooming
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
Context context;
public TouchImageView(Context context) {
super(context);
super.setClickable(true);
this.context ...
Runnable with a parameter?
...nal String str) {
Thread t = new Thread(() -> someFunc(str));
t.start();
}
As before, details like handling that thread in a meaningful way is left as an exercise to the reader. But to put it bluntly, if you're afraid of using lambdas, you should be even more afraid of multi-threaded sy...
What is the difference between concurrency and parallelism?
...
Concurrency is when two or more tasks can start, run, and complete in overlapping time periods. It doesn't necessarily mean they'll ever both be running at the same instant. For example, multitasking on a single-core machine.
Parallelism is when tasks literally ru...
How can building a heap be O(n) time complexity?
...e for buildHeap using the siftUp and siftDown operations we've described.
Start at the top of the heap (the beginning of the array) and call siftUp on each item. At each step, the previously sifted items (the items before the current item in the array) form a valid heap, and sifting the next item u...
How to remove the left part of a string?
...
Starting in Python 3.9, you can use removeprefix:
'Path=helloworld'.removeprefix('Path=')
# 'helloworld'
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