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How to check whether a pandas DataFrame is empty?
How to check whether a pandas DataFrame is empty? In my case I want to print some message in terminal if the DataFrame is empty.
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Map enum in JPA with fixed values?
...m using JPA. I especially want to set the integer value of each enum entry and to save only the integer value.
9 Answers
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Representing Monetary Values in Java [closed]
I understand that BigDecimal is recommended best practice for representing monetary values in Java. What do you use? Is there a better library that you prefer to use instead?
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SQL query to select dates between two dates
I have a start_date and end_date . I want to get the list of dates in between these two dates. Can anyone help me pointing the mistake in my query.
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How to prevent XSS with HTML/PHP?
How do I prevent XSS (cross-site scripting) using just HTML and PHP?
9 Answers
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How do I pass a unique_ptr argument to a constructor or a function?
I'm new to move semantics in C++11 and I don't know very well how to handle unique_ptr parameters in constructors or functions. Consider this class referencing itself:
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Overwrite or override
It might seem to be a stupid question but I'm just so curious and want to use the correct term when talking about the issue. Couldn't find a similar question here so I decided to create a new one.
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Creating hard and soft links using PowerShell
Can PowerShell 1.0 create hard and soft links analogous to the Unix variety?
11 Answers
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What is the advantage of using REST instead of non-REST HTTP?
...dy really agrees on what REST is. The wikipedia page is heavy on buzzwords and light on explanation. The discussion page is worth a skim just to see how much people disagree on this. As far as I can tell however, REST means this:
Instead of having randomly named setter and getter URLs and using GET...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...o do an upsert, which is what MySQL calls INSERT ... ON DUPLICATE UPDATE and the standard supports as part of the MERGE operation.
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