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SQL select join: is it possible to prefix all columns as 'prefix.*'?
... specify what prefix comes before the dot, you can use "SELECT * FROM a AS my_alias", for instance.
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Storing Image Data for offline web application (client-side storage database)
... to show the map tiles
I used the functional tile layer plugin by Ishmael Smyrnow for fetching the tile layer from the DB
https://github.com/ismyrnow/Leaflet.functionaltilelayer
I compared the DB-based tiles layer with a purely local (localhost://) storage
There is no noticeable difference in perf...
Why do this() and super() have to be the first statement in a constructor?
..., or pass them in to your constructor and then pass them to super:
public MySubClassB extends MyClass {
public MySubClassB(Object[] myArray) {
super(myArray);
}
}
If the compiler did not enforce this you could do this:
public MySubClassB extends MyClass {
...
When should we use mutex and when should we use semaphore
...ery powerful building blocks for building all kinds of ipc primitives.
So my recommendation is: if you got cleanly implemented mutexes and condition variables (like with POSIX pthreads) use these.
Use semaphores only if they fit exactly to the problem you are trying to solve, don't try to build ot...
Emacs mode for Stack Overflow's markdown
I am using Org-mode in Emacs to handle all my technical documentation. I would like to use Emacs to prepare questions that I have for Stack Overflow. Is there an Emacs mode for that, or even better, an extension for Org-mode to handle Stack Overflow formatting? Ideally it should include all formatti...
What is a “context bound” in Scala?
...bert's answer covers the techinal details of Context Bounds. I'll give you my interpretation of their meaning.
In Scala a View Bound (A <% B) captures the concept of 'can be seen as' (whereas an upper bound <: captures the concept of 'is a'). A context bound (A : C) says 'has a' about a type....
Click button copy to clipboard using jQuery
... circumstances to rely on using it for this. So, I am endeavoring to keep my answer up to date (which was originally authored almost 2 years ago). We still do not yet have a reliable solution for Safari other than pre-selecting the text and telling the user to manually press Ctrl+C, but at least p...
How can I discard remote changes and mark a file as “resolved”?
...m remote branch and there are conflicts. I know that I would like to keep my local changes and ignore the remote changes causing conflicts. Is there a command I can use to in effect say "mark all conflicts as resolved, use local"?
...
How do you print in a Go test using the “testing” package?
...c:
When iterating locally, I want to be able to make a change, run my tests, see what's happening in the logs immediately to understand what's going on, hit CTRL+C to shut the test down early if necessary, make another change, re-run the tests, and so on.
If TestFoo is slow (e.g., it's an ...
How to add a changed file to an older (not last) commit in Git
...of the old commit, where OLDCOMMIT is something like 091b73a:
git add <my fixed files>
git commit --fixup=OLDCOMMIT
git rebase --interactive --autosquash OLDCOMMIT^
You can also use git commit --squash=OLDCOMMIT to edit the old commit message during rebase.
git rebase --interactive will...