大约有 38,000 项符合查询结果（耗时：0.0408秒） [XML]
How do I get an object's unqualified (short) class name?
...hat code and you get a better result. The above might fetch the reflection from some pool, but this is not the usual behaviour of the applications out there. They only need it once or twice.
– LeMike
Nov 5 '14 at 11:21
...
What is this weird colon-member (“ : ”) syntax in the constructor?
... the exceptions listed at the end of the FAQ entry).
The takeaway point from the FAQ entry is that,
All other things being equal, your code will run faster if you use initialization lists rather than assignment.
sha...
How can I add new keys to a dictionary?
...(): # Iterates just through value, ignoring the keys
Create a dictionary from two lists
data = dict(zip(list_with_keys, list_with_values))
New to Python 3.5
Creating a merged dictionary without modifying originals:
This uses a new featrue called dictionary unpacking.
data = {**data1, **da...
Plot a legend outside of the plotting area in base graphics?
...erior of the plot cover the entire device. new=TRUE is needed to prevent R from starting a new device. We can then add the empty plot:
plot(0, 0, type='n', bty='n', xaxt='n', yaxt='n')
And we are ready to add the legend:
legend("bottomright", ...)
will add a legend to the bottom right of the d...
How to Remove ReadOnly Attribute on File Using PowerShell?
...tem.IO.FileAttributes]::ReadOnly
}
The above code snippet is taken from this article
UPDATE
Using Keith Hill's implementation from the comments (I have tested this, and it does work), this becomes:
$file = Get-Item "C:\Temp\Test.txt"
if ($file.IsReadOnly -eq $true)
{
$file.IsReadOnl...
Execute Python script via crontab
...esn't changes anything,
First, you should redirect both stdin and stderr from crontab execution like below:
*/2 * * * * /usr/bin/python /home/souza/Documets/Listener/listener.py > /tmp/listener.log 2>&1
then you can view the file /tmp/listener.log to see if the script executed as you ...
cannot load such file — zlib even after using rvm pkg install zlib
...
I ended up installing zlib from apt-get and then reinstalling ruby to not use the rvm directory for zlib.
Here's how do:
$ sudo apt-get install zlib1g-dev
$ rvm reinstall 1.9.3
[Edit] As commenter @chrisfinne mentions, on CentOS/RedHat based system...
MongoDB: update every document on one field
...ongo only affects the first document and to update all documents resulting from the query one needs to use 'Multi' update flag. Sample code follows...
var collection = db.GetCollection("Foo");
var query = Query.GTE("No", 1); // need to construct in such a way that it will give all 20K //docs.
var u...
Can a dictionary be passed to django models on create?
...is a django database model instance
def toDict( mod ):
import datetime
from decimal import Decimal
import re
#Go through the object, load in the objects we want
obj = {}
for key in mod.__dict__:
if re.search('^_', key):
continue
#Copy my data
if isinstance( mod.__...
What does an underscore in front of an import statement mean?
I saw this example from sqlite3 on GitHub :
4 Answers
4
...