大约有 44,000 项符合查询结果（耗时：0.0425秒） [XML]
How do I get the object if it exists, or None if it does not exist?
...u can do it this way:
go = Content.objects.filter(name="baby").first()
Now go variable could be either the object you want or None
Ref: https://docs.djangoproject.com/en/1.8/ref/models/querysets/#django.db.models.query.QuerySet.first
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How to understand Locality Sensitive Hashing?
...s between the two points will give the two data different bit value.
Now we look at the signature of the two data points. As in the example, we use only 6 bits(squares) to represent each data. This is the LSH hash for the original data we have.
The hamming distance between the two hashed value...
When to use “new” and when not to, in C++? [duplicate]
...Some examples of this are:
void foo()
{
Point p = Point(0,0);
} // p is now destroyed.
for (...)
{
Point p = Point(0,0);
} // p is destroyed after each loop
Some people will say that the use of new decides whether your object is on the heap or the stack, but that is only true of variables de...
KnockOutJS - Multiple ViewModels in a single View
I'm thinking that my application is getting quite large now, too large to handle each View with a single ViewModel.
5 Answe...
Python 3 ImportError: No module named 'ConfigParser'
... A moving target on this one but I use pip3 install mysql-connector. Now available from MySQL for python3 support. release at time of typing is 2.1.3.
– Longmang
Jun 7 '16 at 9:42
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Where can I download english dictionary database in a text format? [closed]
...
I dont know if its too late, but i thought it would help someone else.
I wanted the same badly...found it eventually.
Maybe its not perfect,but to me its adequate(for my little dictionary app).
http://www.androidtech.com/downloads...
Getting a list of associative array keys
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I'm switching this to the accepted answer now. Only IE8 doesn't support it anymore (for which a polyfill is available developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…)
– Simon_Weaver
Dec 11 '17 at 1:55
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Reloading submodules in IPython
...ole. Unfortunately I am not very happy with workflow that I am using right now, I would appreciate some advice.
13 Answers
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What does FETCH_HEAD in Git mean?
...is a tag for a version of the software. To my surprise, release_1 was then nowhere to be found on my local machine. I had to type
git tag release_1 FETCH_HEAD
to complete the copy of the tagged chain of commits (release_1) from the remote repository to the local one. Fetch had found the remote ...
How to select multiple files with ?
...s not user friendly, the avarage user doesn't understand it, doesn't even know what a "ctrl button" does, and it cannot select files in different folders.
– Jean-Paul
Jan 30 '17 at 16:04
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