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Should I use Java's String.format() if performance is important?
We have to build Strings all the time for log output and so on. Over the JDK versions we have learned when to use StringBuffer (many appends, thread safe) and StringBuilder (many appends, non-thread-safe).
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Difference between except: and except Exception as e: in Python
... print e.message, e.args
...
>>> catch()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in catch
BaseException
Which a bare except does:
>>> def catch():
... try:
... raise BaseException()
... ...
Forced naming of parameters in Python
...(10, forcenamed=20)
10 20
>>> foo(10, 20)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: foo() takes exactly 1 positional argument (2 given)
This can also be combined with **kwargs:
def foo(pos, *, forcenamed, **kwargs):
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Best way to use PHP to encrypt and decrypt passwords? [duplicate]
...ing. You should not rely on unauthenticated encryption for security, especially since the code as provided is vulnerable to padding oracle attacks.
See also:
https://stackoverflow.com/a/30189841/2224584
https://stackoverflow.com/a/30166085/2224584
https://stackoverflow.com/a/30159120/2224584
Al...
How to initialize a List to a given size (as opposed to capacity)?
...ount copies of the reference passed for the value parameter - so they will all refer to the same object. That may or may not be what you want, depending on your use case.
EDIT: As noted in comments, you could make Repeated use a loop to populate the list if you wanted to. That would be slightly fas...
Differences between git pull origin master & git pull origin/master
... checked-out branch.
git pull origin/master will pull changes from the locally stored branch origin/master and merge that to the local checked-out branch. The origin/master branch is essentially a "cached copy" of what was last pulled from origin, which is why it's called a remote branch in git par...
SQL: deleting tables with prefix
How to delete my tables who all have the prefix myprefix_ ?
10 Answers
10
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How can I open multiple files using “with open” in Python?
I want to change a couple of files at one time, iff I can write to all of them. I'm wondering if I somehow can combine the multiple open calls with the with statement:
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Why does Ruby 1.9.2 remove “.” from LOAD_PATH, and what's the alternative?
... LOAD_PATH , so this broke them (they reported "no such file to load" for all require statements that based off the project path). Was there a particular justification for doing this?
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Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
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I marked this answer correct after all these years, because i looked back and the accepted didn't exclude underscores
– Michael Randall
Apr 12 '18 at 11:23
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