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What is a singleton in C#?
...plementing the Singleton Pattern in C#" covering most of what you need to know - including some good advice regarding thread safety.
To be honest, It's very rare that you need to implement a singleton - in my opinion it should be one of those things you should be aware of, even if it's not used too...
How do you force a makefile to rebuild a target
...se variable $(MAKE) instead of make to get recursive make calls
save and now call
make new
and it will recompile everything again
What happened?
1) 'new' calls clean.
'clean' do 'rm' which removes all object files that have the extension of '.o'.
2) 'new' calls 'make'.
'make' see that th...
month name to month number and vice versa in python
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# To get month name
In [2]: datetime.datetime.strftime(datetime.datetime.now(), '%a %b %d, %Y')
Out [2]: 'Thu Aug 10, 2017'
# To get just the month name, %b gives abbrevated form, %B gives full month name
# %b => Jan
# %B => January
dateteime.datetime.strftime(datetime_object, '%b')
...
@selector() in Swift?
.... (In previous versions you got that attribute for free in some cases, but now you have to explicitly declare it.)
Remember that private symbols aren't exposed to the runtime, too — your method needs to have at least internal visibility.
Key paths: These are related to but not quite the same as se...
How should I detect unnecessary #include files in a large C++ project?
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I don't know of any such tools, and I have thought about writing one in the past, but it turns out that this is a difficult problem to solve.
Say your source file includes a.h and b.h; a.h contains #define USE_FEATURE_X and b.h uses ...
Explicit specialization in non-namespace scope [duplicate]
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This answer is not correct anymore, specialization is now allowed in class scope in conformant C++14 (& later) compilers : wg21.cmeerw.net/cwg/issue727
– Jean-Michaël Celerier
Sep 5 '19 at 10:14
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Is Big O(logn) log base e?
...then just end up with an analysis that has log_pi 2 * log_pi n everywhere. Now my analysis is in terms of log_pi n.
– jason
Oct 15 '09 at 1:49
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Guards vs. if-then-else vs. cases in Haskell
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Thanks for the style tip, now it confirmed by doubt.
– eigenfield
Aug 1 '18 at 17:33
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When creating HTML emails, should we use html, head, body tags?
...simply strip the tags and attributes it doesn't want. But you can't never know which ones.
It's easier to find (server side) components that follow format standards, and thus less error prone. Parsers not following standards could possibly break, making your email not getting shown.
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Import CSV file into SQL Server
...alesData.NewRow();
dailyProductSalesRow["SaleDate"] = DateTime.Now.Date;
dailyProductSalesRow["ProductName"] = "Nike";
dailyProductSalesRow["TotalSales"] = 10;
// Add the row to the ProductSalesData DataTable
prodSalesData.Rows.Add(dailyPr...