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How to make an immutable object in Python?
...ots__:
class A(object):
__slots__ = []
Instances of A are immutable now, since you can't set any attributes on them.
If you want the class instances to contain data, you can combine this with deriving from tuple:
from operator import itemgetter
class Point(tuple):
__slots__ = []
def...
How to cast int to enum in C++?
...ven worse, a reinterpret_cast or even a combination of those. Even if you know now in what it will degrade, suppose you change a to another type later on, it could very well be the type of casting changes without you ever getting as much as a warning, you don't want that.
– Kil...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
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Since Java 9 there is now a new javac option --release intended to address this problem, by only allowing use of API available in the specified Java version. For more on this see stackoverflow.com/a/43103038/4653517
– James M...
Android TextWatcher.afterTextChanged vs TextWatcher.onTextChanged
... the text are new.
afterTextChanged(Editable s).
The same as above, except now the text is editable.
Use: when you need to see and possibly edit the new text.
If I'm just listening for changes in EditText, I won't need to use the first two methods at all. I will just receive new values in the thir...
How to compile a 32-bit binary on a 64-bit linux machine with gcc/cmake
...ties(MyTarget PROPERTIES COMPILE_FLAGS "-m32" LINK_FLAGS "-m32")
I don't know of a way to do it globally.
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How can I drop all the tables in a PostgreSQL database?
...njection possibility (and does this really fix one if there is)? [I don't know if Postgres is foolish enough to allow table names to make that possible] If there is, you should really change your comment to an edit in the answer (explaining why in the edit comments).
– Auspex
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Editing the git commit message in GitHub
...blem that if other people on your team have pulled the previous commit you now have different histories (including different commits) on different machines. If you know no one has pulled your commit this is safe. Read source Dan posted
– TMin
Mar 15 '17 at 22:2...
EOFError: end of file reached issue with Net::HTTP
...happens only on multiple calls using the same XMLRPC::Client instance!
So now I'm re-instantiating my client at each call and it just works:|
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How to split a dos path into its components in Python
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In Python >=3.4 this has become much simpler. You can now use pathlib.Path.parts to get all the parts of a path.
Example:
>>> from pathlib import Path
>>> Path('C:/path/to/file.txt').parts
('C:\\', 'path', 'to', 'file.txt')
>>> Path(r'C:\path\to\file...
Efficient way to insert a number into a sorted array of numbers?
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How does the First Method compare now that Chrome uses TimSort? From TimSort Wikipedia: "In the best case, which occurs when the input is already sorted, [TimSort] runs in linear time".
– poshest
Feb 5 at 11:40
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