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Django select only rows with duplicate field values
...ango. The problem is that this will return a ValuesQuerySet with only name and count. However, you can then use this to construct a regular QuerySet by feeding it back into another query:
dupes = Literal.objects.values('name')
.annotate(Count('id'))
.or...
Get all elements but the first from an array
...5 the ArraySegment<> implements IList<>, IReadOnlyList<> and their base interfaces (including IEnumerable<>), so you can for example pass an ArraySegment<> to string.Join.
– Jeppe Stig Nielsen
Jan 25 '17 at 8:49
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what is the use of xsi:schemaLocation?
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The Java XML parser that spring uses will read the schemaLocation values and try to load them from the internet, in order to validate the XML file. Spring, in turn, intercepts those load requests and serves up versions from inside its own JAR files.
If you omit the schemaLocation, then the XML pa...
What's the difference between process.cwd() vs __dirname?
...working directory,
i.e. the directory from which you invoked the node command.
__dirname returns the directory name of the directory containing the JavaScript source code file
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“Templates can be used only with field access, property access, single-dimension array index, or sin
...he error message.
You are trying to pass in a method chain to be executed and it doesn't like it.
This is a perfect example of where the MVVM (Model-View-ViewModel) pattern comes in handy.
You could wrap up your Trainer model class in another class called TrainerViewModel that could work somethin...
What is the “-d” in “npm -d install”?
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It's a shortcut for --loglevel info
See the Shorthands and Other CLI Niceties section:
-d: --loglevel info
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Why is there no GIL in the Java Virtual Machine? Why does Python need one so bad?
...t need a GIL (which is why it can perfectly be implemented on JVM [Jython] and .NET [IronPython], and those implementations multithread freely). CPython (the popular implementation) has always used a GIL for ease of coding (esp. the coding of the garbage collection mechanisms) and of integration of ...
Transfer git repositories from GitLab to GitHub - can we, how to and pitfalls (if any)?
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You can transfer those (simply by adding a remote to a GitHub repo and by pushing them)
create an empty repo on GitHub
git remote add github https://yourLogin@github.com/yourLogin/yourRepoName.git
git push --mirror github
The history will be the same.
But you will loose the access contr...
Specify custom Date format for colClasses argument in read.table/read.csv
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You can write your own function that accepts a string and converts it to a Date using the format you want, then use the setAs to set it as an as method. Then you can use your function as part of the colClasses.
Try:
setAs("character","myDate", function(from) as.Date(from, for...
Git reset --hard and push to remote repository
I had a repository that had some bad commits on it (D, E and F for this example).
5 Answers
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