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How to explain callbacks in plain english? How are they different from calling one function from ano

How to explain callbacks in plain English? How are they different from calling one function from another function taking some context from the calling function? How can their power be explained to a novice programmer? ...
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Simple way to create matrix of random numbers

...: numpy.random.random((3, 3)) Out[9]: array([[ 0.37052381, 0.03463207, 0.10669077], [ 0.05862909, 0.8515325 , 0.79809676], [ 0.43203632, 0.54633635, 0.09076408]]) share | improv...
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How do I merge a list of dicts into a single dict?

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What is the appropriate HTTP status code response for a general unsuccessful request (not an error)?

...et around the error. Use a 5xx for a server error that the client can't really work around. Product sold out would be a server error. The client can't modify the request in some fashion to get around the error. You could switch to another product but wouldn't that be a new request? User maximu...
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Add & delete view from Layout

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switch / pattern matching idea

... and some very smart people have done some very cool things in C#, but actually using it feels heavy. What I have ended up using often (across-projects) in C#: Sequence functions, via extension methods for IEnumerable. Things like ForEach or Process ("Apply"? -- do an action on a sequence item as...
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What should I do if the current ASP.NET session is null?

...ireRequestState runs before control is handed to your Page. So if you are calling other functionality, including static classes, from your page, you should be fine. If you have some classes doing initialization logic during startup, for example on the Application_Start event or by using a static con...
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How to echo with different colors in the Windows command line

... command console doesn't support output coloring by default. You could install either Cmder, ConEmu, ANSICON or Mintty (used by default in GitBash and Cygwin) to add coloring support to your Windows command console. Windows 10 - Command Line Colors Starting from Windows 10 the Windows console supp...
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How can I import a database with MySQL from terminal?

...33 Black 10.9k1919 gold badges8989 silver badges165165 bronze badges answered Dec 28 '10 at 14:34 anonanon ...
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Twitter Bootstrap 3 Sticky Footer

...olor: #f5f5f5; } and the essential HTML: <body> <!-- Wrap all page content here --> <div id="wrap"> <!-- Begin page content --> <div class="container"> </div> </div> <div id="footer"> <div class="contai...