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Get top 1 row of each group
... rn = 1
If you expect 2 entries per day, then this will arbitrarily pick one. To get both entries for a day, use DENSE_RANK instead
As for normalised or not, it depends if you want to:
maintain status in 2 places
preserve status history
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As it stands, you preserve status history. If you wa...
Why are there two ways to unstage a file in Git?
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So typically, one would use git rm --cached <filePath> to remove some file(s) from the repo after realizing it should have never been in the repo: so most likely running this command & then adding the relevant files to gitignore....
How to get subarray from array?
...d. console.log(ar); // -> [1, 2, 3, 4, 5]
– daemonexmachina
Dec 18 '18 at 18:35
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C++ unordered_map using a custom class type as the key
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To be able to use std::unordered_map (or one of the other unordered associative containers) with a user-defined key-type, you need to define two things:
A hash function; this must be a class that overrides operator() and calculates the hash value given an object o...
How to resize superview to fit all subviews with autolayout?
...ntentView and grab the height.
Further considerations exist if you have one or more UILabel's in your view that are multiline. For these it is imperitive that the preferredMaxLayoutWidth property be set correctly such that the label provides a correct intrinsicContentSize, which will be used in ...
The model used to open the store is incompatible with the one used to create the store
...elect the main file, open file inspector (right-hand panel)
and under Versioned core data model select your new version of data model for current data model
THAT'S NOT ALL ) You should perform so called "light migration".
Go to your AppDelegate and find where the persistentStoreCoordinator is being ...
What is the difference between mocking and spying when using Mockito?
...ss of a Type, not from an actual instance. The mock simply creates a bare-bones shell instance of the Class, entirely instrumented to track interactions with it. On the other hand, the spy will wrap an existing instance. It will still behave in the same way as the normal instance – the only differ...
How dangerous is it to access an array out of bounds?
... literal meaning of this is:
behavior, upon use of a nonportable or erroneous program construct or
of erroneous data, for which this International Standard imposes no
requirements
A non-normative note expands on this:
Possible undefined behavior ranges from ignoring the situation
co...
Why use bzero over memset?
... and reduces portability. I doubt you would see any real gains from using one over the other.
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Using git repository as a database backend
...ve to maintain state for all of them. There are several approaches to this one, but all of them are either too hard on resources or too complex to implement (and thus kind of kill the original purpose of offloading all the hard implementation stuff to git in the first place):
"Blunt" approach: 1 u...