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How can I define a composite primary key in SQL?
How can I define a composite primary key consisting of two fields in SQL?
3 Answers
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python dataframe pandas drop column using int
I understand that to drop a column you use df.drop('column name', axis=1). Is there a way to drop a column using a numerical index instead of the column name?
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Byte array to image conversion
I want to convert a byte array to an image.
13 Answers
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Passing command line arguments in Visual Studio 2010?
I am working on a C project and can not figure out how to pass command line arguments to my main function in Visual Studio 2010 Express Edition. I want to debug - how do these command line arguments work?
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Creating a new directory in C
I want to write a program that checks for the existence of a directory; if that directory does not exist then it creates the directory and a log file inside of it, but if the directory already exists, then it just creates a new log file in that folder.
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Associative arrays in Shell scripts
We required a script that simulates Associative arrays or Map like data structure for Shell Scripting, any body?
17 Answers...
Using reflect, how do you set the value of a struct field?
having a rough time working with struct fields using reflect package. in particular, have not figured out how to set the field value.
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How to check for a valid Base64 encoded string
Is there a way in C# to see if a string is Base 64 encoded other than just trying to convert it and see if there is an error? I have code code like this:
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MySQL: Set user variable from result of query
Is it possible to set an user variable based on the result of a query in MySQL?
4 Answers
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How to select only the first rows for each unique value of a column
Let's say I have a table of customer addresses:
5 Answers
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