大约有 30,000 项符合查询结果（耗时：0.0393秒） [XML]
Extract first item of each sublist
...choose highly depends on context, readability, and preference.
More info:
https://docs.python.org/3/library/operator.html#operator.itemgetter
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Sort a list by multiple attributes?
I have a list of lists:
6 Answers
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Check if database exists in PostgreSQL using shell
I was wondering if anyone would be able to tell me about whether it is possible to use shell to check if a PostgreSQL database exists?
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What's the most efficient way to erase duplicates and sort a vector?
I need to take a C++ vector with potentially a lot of elements, erase duplicates, and sort it.
23 Answers
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Declaring and initializing variables within Java switches
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From http://www.coderanch.com/t/447381/java-programmer-SCJP/certification/variable-initialization-within-case-block
Declarations are processed at compile time and do not depend on the
execution flow of your code. Since value...
Can I use multiple “with”?
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PDO closing connection
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According to documentation you're correct (http://php.net/manual/en/pdo.connections.php):
The connection remains active for the lifetime of that PDO object. To
close the connection, you need to destroy the object by ensuring that
all remaining references to it...
C#: Printing all properties of an object [duplicate]
Is there a method built in to .NET that can write all the properties and such of an object to the console? Could make one using reflection of course, but I'm curious to if this already exists... especially since you can do it in Visual Studio in the Immediate Window. There you can an object name (wh...
How do I find files with a path length greater than 260 characters in Windows?
I'm using a xcopy in an XP windows script to recursively copy a directory. I keep getting an 'Insufficient Memory' error, which I understand is because a file I'm trying to copy has too long a path. I can easily reduce the path length, but unfortunately I can't work out which files are violating t...
How do I list all files of a directory?
How can I list all files of a directory in Python and add them to a list ?
21 Answers
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