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Dismissing a Presented View Controller
...ontroller
When a View Controller is presented modally, you can dismiss it (from the second view controller) by calling
// Swift
self.dismiss(animated: true, completion: nil)
// Objective-C
[self dismissViewControllerAnimated:YES completion:nil];
The documentation says,
The presenting view control...
Can you explain the HttpURLConnection connection process?
...// instantiate OutputStreamWriter using the output stream, returned
// from getOutputStream, that writes to this connection.
// 2. This is the point where you'll know if the connection was
// successfully established. If an I/O error occurs while creating
// the output stream, you'll...
How to generate and validate a software license key?
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Caveat: you can't prevent users from pirating, but only make it easier for honest users to do the right thing.
Assuming you don't want to do a special build for each user, then:
Generate yourself a secret key for the product
Take the user's name
Concaten...
Why is std::map implemented as a red-black tree?
...Black trees are used in most collection libraries, including the offerings from Java and Microsoft .NET Framework.
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Why is reading lines from stdin much slower in C++ than Python?
I wanted to compare reading lines of string input from stdin using Python and C++ and was shocked to see my C++ code run an order of magnitude slower than the equivalent Python code. Since my C++ is rusty and I'm not yet an expert Pythonista, please tell me if I'm doing something wrong or if I'm mis...
What is the difference between bottom-up and top-down?
...pically, you would perform a recursive call (or some iterative equivalent) from the root, and either hope you will get close to the optimal evaluation order, or obtain a proof that you will help you arrive at the optimal evaluation order. You would ensure that the recursive call never recomputes a s...
How to trim a file extension from a String in JavaScript?
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if you want to remove an extension from a path including the directories, you can do var parsed = path.parse(filename) followed by path.join(parsed.dir, parsed.name).
– Jespertheend
Nov 22 '19 at 8:41
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Removing colors from output
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I couldn't get decent results from any of the other answers, but the following worked for me:
somescript | sed -r "s/[[:cntrl:]]\[[0-9]{1,3}m//g"
If I only removed the control char "^[", it left the rest of the color data, e.g., "33m". Including the c...
What kinds of patterns could I enforce on the code to make it easier to translate to another program
... am setting out to do a side project that has the goal of translating code from one programming language to another. The languages I am starting with are PHP and Python (Python to PHP should be easier to start with), but ideally I would be able to add other languages with (relative) ease. The plan i...
Wireshark localhost traffic capture [closed]
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I haven't actually tried this, but this answer from the web sounds promising:
Wireshark can't actually capture local packets on windows XP due to
the nature of the windows TCP stack. When packets are sent and
received on the same machine they don't seem to cross t...