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When should I mock?

...er interface. Before we pass a mock MailServer, we "train" it, so that it knows what method calls to expect and what return values to return. At the end, the mock object asserts, that all expected methods were called as expected. This sounds good in theory, but there are also some downsides. Mock sh...
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How do I put a variable inside a string?

... With the introduction of f-strings in Python 3.6, this can now be written as plot.savefig(f'hanning{num}.pdf'). I added an answer with this info. – joelostblom May 26 '17 at 15:30 ...
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What is function overloading and overriding in php?

...ue; $a=doSomething(); Each variable is of a different type, yet you can know the type before execution (see the 4th one). As a comparison, other languages use: int a=1; String s="1"; bool a=true; something a=doSomething(); In the last example, you must forcefully set the variable's type (as an ...
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What is a magic number, and why is it bad? [closed]

...vention, it's a number that you made up for reasons outlined in the spec. Now, what you do is you have the 50 in different places - your SQL script (SELECT TOP 50 * FROM orders), your Website (Your Last 50 Orders), your order login (for (i = 0; i < 50; i++)) and possibly many other places. Now,...
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Xcode stuck at “Your application is being uploaded”

...file. And that's it !! You can easily upload your binary file to App store now. If the above methods still doesn't help then follow this fourth method: Regenerate your certificate Goto iOS developer portal (https://developer.apple.com/membercenter). Revoke current certificate which is used by yo...
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What is the runtime performance cost of a Docker container?

...en you can expect a minor hit in latency, as shown below. However, you can now use the host network stack (e.g., docker run --net=host) when launching a Docker container, which will perform identically to the Native column (as shown in the Redis latency results lower down). They also ran latency...
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How to convert a normal Git repository to a bare one?

...f repo with the contents of repo/.git, then tell the repository that it is now a bare repository. To do this, execute the following commands: cd repo mv .git ../repo.git # renaming just for clarity cd .. rm -fr repo cd repo.git git config --bool core.bare true Note that this is different from do...
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How do I display an alert dialog on Android?

..._demo); dialog.setTitle(R.string.dialog_title); dialog.show(); } Now create Layout XML dialog_demo.xml and create your UI/design. Here is a sample one I created for demo purposes: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com...
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Haskell testing workflow

...ot of sense to integrate your toolchain with it. Edit: Cabal test support now does exist. See http://www.haskell.org/cabal/release/cabal-latest/doc/users-guide/developing-packages.html#test-suites share | ...
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Max or Default?

... Although DefaultIfEmpty is now implemented in LINQ to SQL, this answer remains better IMO, as using DefaultIfEmpty results in a SQL statement 'SELECT MyCounter' that returns a row for every value being summed, whereas this answer results in MAX(MyCount...