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What's the difference between findAndModify and update in MongoDB?
... @chaonextdoor findAndModify acquires a lock to the database when it starts the operation so that no other operation can process when it is running. When it finishes the operation it releases the lock.
– Lycha
May 28 '12 at 9:28
...
Regular expression matching a multiline block of text
...ight be useful: ^(.+?)\n\n((?:[A-Z]+\n)+)
The first character (^) means "starting at the beginning of a line". Be aware that it does not match the newline itself (same for $: it means "just before a newline", but it does not match the newline itself).
Then (.+?)\n\n means "match as few characters...
How do I undo the most recent local commits in Git?
...but keep your changes for a bit of editing before you do a better commit. Starting again from here, with C as your HEAD:
(F)
A-B-C
↑
master
You can do this, leaving off the --hard:
git reset HEAD~1
In this case the result is:
(F)
A-B-C
↑
master
In both cases, HEAD is just...
Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...
"Starting February 1, 2015, new iOS apps uploaded to the App Store must include 64-bit support..." - Apple Developer News and Updates, October 20, 2014
– Pang
Dec 8 '14 at 3:32
...
Returning an array using C
...ation. I would definitley add some allocation check. Very good proposal to start with :)
– urkon
Jan 4 '18 at 13:47
Ob...
Proper way to declare custom exceptions in modern Python?
...
@neves for a start, using tuples to store exception information has no benefit over using a dictionary to do the same. If you are interested in the reasoning behind the exception changes, take a look at PEP352
– frnk...
What is the difference between the HashMap and Map objects in Java?
...a accessor methods) with subclasses. Let's say I write it with HashMaps to start with because I think that's the appropriate structure to use when writing the class.
Later, Mary writes code subclassing it. She has something she needs to do with both things and moreThings, so naturally she puts that...
How can I get the version defined in setup.py (setuptools) in my package?
...nown'
with file('mypkg/mymod.py') as f:
for line in f:
if line.startswith('__version__'):
_, _, version = line.replace("'", '').split()
break
If you'd like to be extra careful and use a real parser:
import ast
version = '0.30.unknown2'
with file('mypkg/mymod.py...
Give all the permissions to a user on a DB
... privileges ON DATABASE sounds mighty, but it doesn't do much. It's just a start. It does not grant any privileges on contained objects.
– Erwin Brandstetter
Sep 19 '18 at 22:05
...
SQL, Postgres OIDs, What are they and why are they useful?
...e it's a global counter that can wrap. If it does wrap, some slowdown may start occurring when it's used and "searched" for unique values, etc.
See also https://wiki.postgresql.org/wiki/FAQ#What_is_an_OID.3F
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