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What does the “at” (@) symbol do in Python?
...he @ sign.
First sighting
The microframework Flask introduces decorators from the very beginning in the following format:
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello World!"
This in turn translates to:
rule = "/"
view_func = hello
# They g...
REST HTTP status codes for failed validation or invalid duplicate
...The only other alternative is 422 Unprocessable Entity. It actually comes from WebDav but it is perfectly valid to reuse any status code that has been registered with IANA.
– Darrel Miller
Jul 20 '10 at 19:38
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How do I specify local .gem files in my Gemfile?
...y editing your Gemfile.
Specifying a :path attribute will install the gem from that path on your local machine.
gem "foreman", path: "/Users/pje/my_foreman_fork"
Alternately, specifying a :git attribute will install the gem from a remote git repository.
gem "foreman", git: "git://github.com/pje...
Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
..." library
BTW, the terminology used here is based on the pattern language from my book.
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Difference between FetchType LAZY and EAGER in Java Persistence API?
...t; students;
// setters and getters
}
Now when you load a University from the database, JPA loads its id, name, and address fields for you. But you have two options for how students should be loaded:
To load it together with the rest of the fields (i.e. eagerly), or
To load it on-demand (i...
SonarQube Exclude a directory
I am trying to exclude a directory from being analyzed by Sonar. I have the following properties defined in my sonar-project.properties file:
...
How do you run a single test/spec file in RSpec?
... want to execute your specs using Rake in order to ensure you are starting from a blank database.
– superluminary
Oct 2 '13 at 11:54
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Converting NumPy array into Python List structure?
...,6]]).tolist()
[[1, 2, 3], [4, 5, 6]]
Note that this converts the values from whatever numpy type they may have (e.g. np.int32 or np.float32) to the "nearest compatible Python type" (in a list). If you want to preserve the numpy data types, you could call list() on your array instead, and you'll e...
Using CSS to affect div style inside iframe
...licy applies, so you can only do this to an iframe element which is coming from your own server.
I use the Prototype framework to make it easier:
frame1.$('mydiv').style.border = '1px solid #000000'
or
frame1.$('mydiv').addClassName('withborder')
...
Why doesn't Java Map extend Collection?
...
From the Java Collections API Design FAQ:
Why doesn't Map extend Collection?
This was by design. We feel that
mappings are not collections and
collections are not mappings. Thus, it
makes little sense for Map t...