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How do I deep copy a DateTime object?

Now $date1 and $date2 contain the same date -- three years from now. I'd like to create two separate datetimes, one which is parsed from a string and one with three years added to it. Currently I've hacked it up like this: ...
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How can mixed data types (int, float, char, etc) be stored in an array?

...lowing you to use them freely without worrying about segfault or anything. From the linked Wikipedia article above: A significant example of the use of tagged pointers is the Objective-C runtime on iOS 7 on ARM64, notably used on the iPhone 5S. In iOS 7, virtual addresses are 33 bits (byte-aligned)...
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What to add for the update portion in ConcurrentDictionary AddOrUpdate

... Good answer. Just from the signature of the AddOrUpdate() displayed in Visual Studio you can only guess the meaning of the 2 parameters. However in the specific case, that @user438331 asks about, I think the solution in my answer using a simpl...
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What is the difference between setUp() and setUpClass() in Python unittest?

... The output in the answer is correct. I pasted it directly from unittest’s output. setUp and tearDown are each run once for every test method (so twice in total in this example) but setUpClass and tearDownClass are run just once each. – Benjamin Hodgson♦ ...
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How can I update a single row in a ListView?

...iew using View#getChildAt(int index). The catch is that it starts counting from the first visible item. In fact, you can only get the visible items. You solve this with ListView#getFirstVisiblePosition(). Example: private void updateView(int index){ View v = yourListView.getChildAt(index - ...
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counting number of directories in a specific directory

...cusive in directories, -type d means directory, and wc -l means line count from given directory listing – shiyani suresh Jan 22 '16 at 0:33 ...
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.NET XML serialization gotchas? [closed]

... When serializing into an XML string from a memory stream, be sure to use MemoryStream#ToArray() instead of MemoryStream#GetBuffer() or you will end up with junk characters that won't deserialize properly (because of the extra buffer allocated). http://msdn.mic...
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Find and restore a deleted file in a Git repository

... From the windows command line I got an error. error: pathspec <filename> did not match any file(s) known to git.. The solution was to use git bash. – donturner Jul 26 '12 at 18:07 ...
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Javascript callback when IFRAME is finished loading?

...ve no control over the content in the IFRAME, so I can't fire the callback from there. 10 Answers ...
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Scroll Element into View with Selenium

... next bit of the page after scrolling, among other possibilities. Speaking from experience, Selenium has frequently broken my company's site because the automated action occurred faster than the Javascript could complete, and thus passed an incomplete data model. Some places may consider it a bug, b...