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What does the “at” (@) symbol do in Python?
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An @ symbol at the beginning of a line is used for class, function and method decorators.
Read more here:
PEP 318: Decorators
Python Decorators
The most common Python decorators you'll run into are:
@property
@classmethod
@staticmethod
If you see an @ in the middle of a line, that's ...
find filenames NOT ending in specific extensions on Unix?
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Or without ( and the need to escape it:
find . -not -name "*.exe" -not -name "*.dll"
and to also exclude the listing of directories
find . -not -name "*.exe" -not -name "*.dll" -not -type d
or in positive logic ;-)
find . -not -nam...
Mongoimport of json file
...fileName.json --jsonArray -u ser -p password
– Diego Andrés Díaz Espinoza
Jul 11 '19 at 16:37
Adding to @DiegoAndré...
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
... I'll try to make it clear.
You can omit dot when using the prefix, infix and postfix notations -- the so called operator notation. While using the operator notation, and only then, you can omit the parenthesis if there is less than two parameters passed to the method.
Now, the operator notation i...
Max return value if empty query
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I know this is an old question and the accepted answer works, but this question answered my question about whether such an empty set would result in an exception or a default(int) result.
The accepted answer however, while it does work, isn't the ideal so...
Case in Select Statement
I have an SQL statement that has a CASE from SELECT and I just can't get it right. Can you guys show me an example of CASE where the cases are the conditions and the results are from the cases. For example:
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Bidirectional 1 to 1 Dictionary in C#
...neToOne<T, S> which is guaranteed to only contain one of each value and key (up to RefEquals anyway), and which can be searched using either key or value. Anyone know of one, or should I just implement it myself? I can't believe that I'm the first person to need this...
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open_basedir restriction in effect. File(/) is not within the allowed path(s):
...ng this error on an avatar upload on my site. I've never gotten it before and nothing was changed recently for me to begin getting this error...
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LINQ OrderBy versus ThenBy
.....) allows you to build a single composite comparison for any two objects, and then sort the sequence once using that composite comparison. That's almost certainly what you want.
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Get current batchfile directory
Firstly, I saw this topic but I couldn't understand that.
4 Answers
4
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