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What is the difference between encode/decode?
...hy have you deleted it? Don't delete comments that have been replied to) already said it. My reply (.encode('ascii').decode('unicode-escape')) does not depend on sys.getdefaultencoding().
– jfs
Jun 30 '15 at 19:02
...
Insert, on duplicate update in PostgreSQL?
...1 FROM table WHERE id=3);
The UPDATE will succeed if a row with "id=3" already exists, otherwise it has no effect.
The INSERT will succeed only if row with "id=3" does not already exist.
You can combine these two into a single string and run them both with a single SQL statement execute from you...
Best practice: PHP Magic Methods __set and __get [duplicate]
...d public properties) as much as possible, because they make code much more readable. Compare:
this code unequivocally says what i'm doing:
echo $user->name;
this code makes me feel stupid, which i don't enjoy:
function getName() { return $this->_name; }
....
echo $user->getName();
T...
Facebook database design?
...ould not need a row in the table such as (2,1) or (3,2) because they are already represented in the other direction. For examples where friendship or other relations aren't explicitly two way, you would need to also have those rows to indicate the two-way relationship.
...
The written versions of the logical operators
...an it is helpful. I'm sure if it were normal, they would be much easier to read, but people are so used to && and || anything else just gets distracting.
EDIT: I have seen a very slight increase in their usage since I posted this, however. I still avoid them.
...
Android - how do I investigate an ANR?
...
An ANR happens when some long operation takes place in the "main" thread. This is the event loop thread, and if it is busy, Android cannot process any further GUI events in the application, and thus throws up an ANR dialog.
Now, in the trace you posted, the main thread seems to be doing fine...
AsyncProcedures异步过程扩展 · App Inventor 2 中文网
...
示例2：文件操作
// 异步读取多个文件
when ReadFilesButton.Click
do
make global FileList from list "file1.txt", "file2.txt", "file3.txt"
call AsyncProcedures1.RunProcedureWithData ReadMultipleFiles FileList
// 异步读取文件过程
procedure ReadMultipleFi...
window.close and self.close do not close the window in Chrome
...le with window.close or the particular behavior difference among browsers, read this answer very carefully - it really does have all the right information.
– Bron Davies
Feb 25 '14 at 16:06
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Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
...w to calculate the row counts and other statistics for each group continue reading below.
Detailed example:
Consider the following example dataframe:
In [2]: df
Out[2]:
col1 col2 col3 col4 col5 col6
0 A B 0.20 -0.61 -0.49 1.49
1 A B -1.53 -1.01 -0.39 1.82
2 A B -0.4...
Need to reset git branch to origin version
...et, mybranch@{1} refers to the old commit, before reset.
But if you had already pushed, see "Create git branch, and revert original to upstream state" for other options.
With Git 2.23 (August 2019), that would be one command: git switch.
Namely: git switch -C mybranch origin/mybranch
Example
C...