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Extract substring in Bash
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@jonnyB, Some time in the past that worked. I am told by my coworkers it stopped, and they changed it to be a sed command or something. Looking at it in the history, I was running it in a sh script, which was probably dash. At this point I can't get it to work anymore.
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When use getOne and findOne methods Spring Data JPA
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TL;DR
T findOne(ID id) (name in the old API) / Optional<T> findById(ID id) (name in the new API) relies on EntityManager.find() that performs an entity eager loading.
T getOne(ID id) relies on EntityManager.getReference() that performs an entity lazy loading. So to ensure the effective ...
What is the 'CLSCompliant' attribute in .NET?
... with the CLSCompliant attribute when you want to make sure it can be used by any other .NET language.
These are the basic rules:
Unsigned types should not be part of the public interface of the class. What this means is public fields should not have unsigned types like uint or ulong, public metho...
Difference between del, remove and pop on lists
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Use del to remove an element by index, pop() to remove it by index if you need the returned value, and remove() to delete an element by value. The last requires searching the list, and raises ValueError if no such value occurs in the list.
When deleting...
Why doesn't await on Task.WhenAll throw an AggregateException?
...ceptions and not aggregated exceptions.
-- Edit --
Got it:
An Async Primer by Bill Wagner
Bill Wagner said: (in When Exceptions Happen)
...When you use await, the code generated by the compiler unwraps the
AggregateException and throws the underlying exception. By leveraging
await, you avoid the ex...
Why use pointers? [closed]
...x datatypes such as a string. There are also no way of passing a variable "by reference" to a function. That's where you have to use pointers. Also you can have them to point at virtually anything, linked lists, members of structs and so on. But let's not go into that here.
How do you use pointers...
Can't seem to discard changes in Git
...s.
core.safecrlf
If true, makes git check if converting CRLF as controlled by
core.autocrlf is reversible. Git will
verify if a command modifies a file in
the work tree either directly or
indirectly. For example, committing a
file followed by checking out the same
file should yield the original file...
LINQ: Distinct values
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Are you trying to be distinct by more than one field? If so, just use an anonymous type and the Distinct operator and it should be okay:
var query = doc.Elements("whatever")
.Select(element => new {
id = (in...
Image comparison - fast algorithm
...appropriate bucket. When we're done tallying, we divide each bucket total by the number of pixels in the entire image to get a normalized histogram for the green channel.
For the texture direction histogram, we started by performing edge detection on the image. Each edge point has a normal vector...
What's the “big idea” behind compojure routes?
... the notion of "routes". These are actually implemented at a deeper level by the Clout library (a spinoff of the Compojure project -- many things were moved to separate libraries at the 0.3.x -> 0.4.x transition). A route is defined by (1) an HTTP method (GET, PUT, HEAD...), (2) a URI pattern (...