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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?
I have always seen people write
9 Answers
9
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How to know/change current directory in Python shell?
I am using Python 3.2 on Windows 7. When I open the Python shell, how can I know what the current directory is and how can I change it to another directory where my modules are?
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Determine which MySQL configuration file is being used
Is there a command to determine which configuration file MySQL 5.0 is currently using?
15 Answers
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Only get hash value using md5sum (without filename)
I use md5sum to generate a hash value for a file.
But i only need to receive the hash value, not the file name.
15 Answers
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Why is printing “B” dramatically slower than printing “#”?
I generated two matrices of 1000 x 1000 :
3 Answers
3
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How to see query history in SQL Server Management Studio
Is the query history stored in some log files? If yes, can you tell me how to find their location? If not, can you give me any advice on how to see it?
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How do you determine what SQL Tables have an identity column programmatically
I want to create a list of columns in SQL Server 2005 that have identity columns and their corresponding table in T-SQL.
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Array.push() if does not exist?
How can I push into an array if neither values exist? Here is my array:
23 Answers
23
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Apache Spark: The number of cores vs. the number of executors
I'm trying to understand the relationship of the number of cores and the number of executors when running a Spark job on YARN.
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Is there a minlength validation attribute in HTML5?
It seems the minlength attribute for an <input> field doesn't work.
17 Answers
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