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What exactly is metaprogramming?
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wikipedia has a nice article on the topic. One does not have to do runtime modifications for something to qualify as metaprogramming. For example, many people use C++ templates to do metaprogramming at compile time.
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What is the difference between git clone and checkout?
...e is useful and adds meaning, but the phrase "checkout is to checkout..." doesn't add meaning, nor does it actually help to distinguish the difference between the two operations.
– C Perkins
Feb 19 at 22:10
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Unique combination of all elements from two (or more) vectors
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Varies the first element fastest. Never converts strings to factors.
Does not add any additional attributes. Returns a tibble, not a data
frame. Can expand any generalised vector, including data frames.
a <- c("ABC", "DEF", "GHI")
b <- c("2012-05-01", "2012-05-02", "2012-05-03", "201...
How to unit test an object with database queries
... What is the value in mocking out database calls in your unit tests? It doesn't seem useful because you could change the implementation to return a different result, but your unit test would (incorrectly) pass.
– bmay2
Aug 20 '17 at 13:09
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How to re-create database for Entity Framework?
...lder location. You can create a new project and create a new mdf. The mdf does not have to match your old tables, because were going to delete it. So create or copy an old one to the correct folder.
Open it in server explorer [double click the mdf from solution explorer]
Delete it in server explore...
What is the common header format of Python files?
...have legal disclaimers or licencing info, it goes into a separate file. It does not need to infect every source code file. Your copyright should be part of this. People should be able to find it in your LICENSE file, not random source code.
Metadata such as authorship and dates is already maintain...
Symbolic link to a hook in git
...hook, now I added a "hooks" directory to my main project folder (since git doesn't track changes in .git/hooks), somewhere I read that I can make a symbolic link from hooks to .git/hooks so I don't have to copy the file from one folder to the other every time someone changes it so I tried:
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How to install APK from PC?
...ndroid just tap the install buttons that appear. Airdroid is wonderful and does a lot more than just apks.
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What is “loose coupling?” Please provide examples
I can't seem to grok the concept of "loose coupling." I suppose it doesn't help that the word "loose" usually has a negative connotation, so I always forget that loose coupling is a good thing.
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How do I catch a PHP fatal (`E_ERROR`) error?
I can use set_error_handler() to catch most PHP errors, but it doesn't work for fatal ( E_ERROR ) errors, such as calling a function that doesn't exist. Is there another way to catch these errors?
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