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More elegant “ps aux | grep -v grep”
...
This works for me for an arbitrary string, but not for a username, e.g. ps aux | grep '[r]oot' . Does anyone know why?
– kxsong
Oct 1 '14 at 19:41
...
Why is it not possible to extend annotations in Java?
...is:
@Target(ElementType.ANNOTATION_TYPE)
public @interface Category {
String category();
}
@Category(category="validator")
public @interface MyFooBarValidator {
}
As you can see, you can easily group and categorize annotations without undue pain using the provided facilities.
So, KISS is...
Compiled vs. Interpreted Languages
...guages
Note that modern techniques such as bytecode compilation add some extra complexity - what happens here is that the compiler targets a "virtual machine" which is not the same as the underlying hardware. These virtual machine instructions can then be compiled again at a later stage to get nat...
Can I serve multiple clients using just Flask app.run() as standalone?
... need static files, no HTTP Post methods. My requirement is, I want to run all Flask threads as part of my parent app, so that they all can share variables.
– ATOzTOA
Feb 12 '13 at 6:03
...
Java volatile reference vs. AtomicReference
...ick with a volatile field, simplest solution and lowest overhead.
Need the extra functionality? If this is a performance(speed/memory overhead) sensitive part of your code make a choice between AtomicReference/AtomicFieldUpdater/Unsafe where you tend to pay in readability and risk for your performan...
What is the Difference Between Mercurial and Git?
...heuristic like in Git, there is nothing in the model that precludes adding extra information to a snapshot, e.g., rename information. We do that in Mercurial.
– Martin Geisler
Jan 26 '11 at 9:05
...
Mediator Vs Observer Object-Oriented Design Patterns
...-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
The Mediator pattern:
Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each o...
How can I do test setup using the testing package in Go
...func TestAddition(t *testing.T) {
cases := []struct {
name string
a int
b int
expected int
}{
{"add", 2, 2, 4},
{"minus", 0, -2, -2},
{"zero", 0, 0, 0},
}
teardownTestCase := setupTestCase(t)
defer teardow...
Do you put unit tests in same project or another project?
...mated or continuous build.
I don't really know of any pros. Having an extra project (or 10) isn't a con.
Edit: More Info On Build and Shipping
I would further recommend that any automated build process place production and unit tests into different locations. Ideally, the unit test build pro...
django - why is the request.POST object immutable?
...
It's a bit of a mystery, isn't it? Several superficially plausible theories turn out to be wrong on investigation:
So that the POST object doesn't have to implement mutation methods? No: the POST object belongs to the django.http.QueryDict class, which implements a full set ...