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sql primary key and index
...x does no good, but the only harm (very small) is the additional file size and row-creation overhead.
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Why should the copy constructor accept its parameter by reference in C++?
...cause if it's not by reference, it's by value. To do that you make a copy, and to do that you call the copy constructor. But to do that, we need to make a new value, so we call the copy constructor, and so on...
(You would have infinite recursion because "to make a copy, you need to make a copy".)
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How to handle configuration in Go [closed]
I'm new at Go programming, and I'm wondering: what is the preferred way to handle configuration parameters for a Go program (the kind of stuff one might use properties files or ini files for, in other contexts)?
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How to change the Text color of Menu item in Android?
Can I change the background color of a Menu item in Android?
27 Answers
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How to enable/disable bluetooth programmatically in android
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Android BluetoothAdapter docs say it has been available since API Level 5. API Level 5 is Android 2.0.
You can try using a backport of the Bluetooth API (have not tried it personally): http://code.google.com/p/backport-andro...
How to Implement Custom Table View Section Headers and Footers with Storyboard
...g a storyboard we could simply drag a UIView onto the canvas, lay it out and then set it in the tableView:viewForHeaderInSection or tableView:viewForFooterInSection delegate methods.
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Listen for key press in .NET console app
... @v.oddou After the last line, simply add your Console.ReadLine() and you're set, no?
– Gaffi
Jan 16 '16 at 1:13
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Python dictionary: Get list of values for list of keys
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Converting the OP's list to a set at least makes it linear, but it's still linear on the wrong data structure as well as losing order. Consider the case of a 10k dictionary and 2 keys in mykeys. Your solution makes 10k set ...
Integrated Markdown WYSIWYG text editor
...e (now hidden) <textarea>. The content is run through to-markdown to convert from HTML to Markdown.
If the <textarea> is a field in a <form>, then the edited Markdown will be sent to the server when that form is submitted.
The inspiration for this comes from the Hallo Markdown Exam...
How do I get time of a Python program's execution?
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Yes, it gives a number of seconds. You can convert to min:seconds if you want. Look at Paul McGuire's answer and its secondsToStr() function.
– steveha
Dec 19 '13 at 6:48
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