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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
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This is exactly why one might prefer the dict() method for initialization, it forces the dictionary keys to be valid identifiers, so they are compatible with, for example, **kwargs, and keys are valid attribute names.
– Ruf...
How do I add a foreign key to an existing SQLite table?
...ust quoting the sqlite FAQ: sqlite.org/faq.html#q11. In fact, RENAME TO is one of the few ALTER TABLE variants that is currently supported in sqlite 3.
– Daniel Vassallo
Dec 11 '09 at 19:37
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Images can't contain alpha channels or transparencies
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Worked for me too.Thx
– Honey
Sep 5 '14 at 11:22
6
JPEG is lossy, and...
Is it bad practice to make a setter return “this”?
...or which fields you want to set.
Alternatives to this method might be:
One mega constructor (downside: you might pass lots of nulls or default values, and it gets hard to know which value corresponds to what)
Several overloaded constructors (downside: gets unwieldy once you have more than a few)...
How do I select an entire row which has the largest ID in the table?
...e of max(id) is not unique, multiple rows are returned.
If you only want one such row, use @MichaelMior's answer,
SELECT row from table ORDER BY id DESC LIMIT 1
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Remove all special characters, punctuation and spaces from string
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This can be done without regex:
>>> string = "Special $#! characters spaces 888323"
>>> ''.join(e for e in string if e.isalnum())
'Specialcharactersspaces888323'
You can use str.isalnum:
S.isalnum() -> bool
Re...
Relationship between SciPy and NumPy
...re describing is interesting, because both versions are coming from numpy. One is a ufunc, the other is a numpy.lib function. Why scipy is preferring the library function over the ufunc, I don't know off the top of my head.
EDIT: In fact, I can answer the log10 question. Looking in the scipy __in...
How do I use LINQ Contains(string[]) instead of Contains(string)
I got one big question.
22 Answers
22
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Is there ever a time where using a database 1:1 relationship makes sense?
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A 1:1 relationship typically indicates that you have partitioned a larger entity for some reason. Often it is because of performance reasons in the physical schema, but it can happen in the logic side as well if a large chunk of the data is expected to be "unknown" at the same time (i...
What is the difference between fastcgi and fpm?
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A key advantage of php-fpm is that one APC cache can be shared across multiple processes. With fcgid, the APC cache is per-process. Using fpm can result in big memory savings, which allow you to use that saved memory to spawn more processes, and serve more tra...