大约有 40,000 项符合查询结果（耗时：0.0276秒） [XML]
How do I get the “id” after INSERT into MySQL database with Python?
...
Only because cursor.lastrowid is automatically set on the cursor object as part of cursor.execute() and is just an attribute lookup. connection.insert_id() is an additional unnecessary function call - an which has already been called and whose result is available on the l...
Entity Framework .Remove() vs. .DeleteObject()
...ild to the parent in the database allows NULL values, this foreign will be set to null and if you call SaveChanges this NULL value for the childEntity will be written to the database (i.e. the relationship between the two is removed). This happens with a SQL UPDATE statement. No DELETE statement occ...
Python module os.chmod(file, 664) does not change the permission to rw-rw-r— but -w--wx----
...ndering why that leading zero is important, it's because
permissions are set as an octal integer, and Python automagically
treats any integer with a leading zero as octal. So os.chmod("file",
484) (in decimal) would give the same result.
What you are doing is passing 664 which in octal is 12...
Git alias with positional parameters
...
Does this work if you want to set default arguments? e.g. I want to do this to fetch a Github PR: fp = "! 1=${1:-$(git headBranch)}; 2=${2:-up}; git fetch -fu $2 pull/$1/head:$1; git checkout $1; git branch -u $2 #". This works great without the first two...
Are there any downsides to enabling git rerere?
...though. From the documentation:
git rerere forget <pathspec>
This resets the conflict resolutions which rerere has recorded for the current conflict in <pathspec>.
Be careful to use it on specific paths; you don't want to blow away all of your recorded resolutions everywhere. (forget w...
getSupportActionBar from inside of Fragment ActionBarCompat
...portActionBar().
((AppCompatActivity)getActivity()).getSupportActionBar().setSubtitle(R.string.subtitle);
You do need the cast. It's not poor design, it's backwards compatibility.
share
|
improve...
Unicode, UTF, ASCII, ANSI format differences
...laces, it means UTF-8. Properly, Unicode refers to the abstract character set itself, not to any particular encoding.
UTF-16: 2 bytes per "code unit". This is the native format of strings in .NET, and generally in Windows and Java. Values outside the Basic Multilingual Plane (BMP) are encoded as su...
How to send POST request?
...urllib.request import Request, urlopen
url = 'https://httpbin.org/post' # Set destination URL here
post_fields = {'foo': 'bar'} # Set POST fields here
request = Request(url, urlencode(post_fields).encode())
json = urlopen(request).read().decode()
print(json)
Sample output:
{
"args": {},
...
Best way to show a loading/progress indicator?
...sBar instead
ProgressDialog progress = new ProgressDialog(this);
progress.setTitle("Loading");
progress.setMessage("Wait while loading...");
progress.setCancelable(false); // disable dismiss by tapping outside of the dialog
progress.show();
// To dismiss the dialog
progress.dismiss();
OR
Progres...
Matplotlib discrete colorbar
...n my method) is making 0 showup as grey.
For images i often use the cmap.set_bad() and convert my data to a numpy masked array. That would be much easier to make 0 grey, but i couldnt get this to work with the scatter or the custom cmap.
As an alternative you can make your own cmap from scratch,...