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SQL Server: Difference between PARTITION BY and GROUP BY
...A group by normally reduces the number of rows returned by rolling them up and calculating averages or sums for each row. partition by does not affect the number of rows returned, but it changes how a window function's result is calculated.
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Firing a double click event from a WPF ListView item using MVVM
...se data binding is not a solution to everything. In your scenario I would handle the DoubleClick event in the code behind file and delegate this call to the ViewModel.
Sample applications that use code behind and still fulfill the MVVM separation can be found here:
WPF Application Framework (WAF) ...
Java Singleton and Synchronization
Please clarify my queries regarding Singleton and Multithreading:
8 Answers
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Access restriction: The type 'Application' is not API (restriction on required library rt.jar)
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This happened to me as well, and the answers given here already were not satisfying, so I did my own research.
Background: Eclipse access restrictions
Eclipse has a mechanism called access restrictions to prevent you from accidentally using classes whi...
Fastest way to flatten / un-flatten nested JSON objects
I threw some code together to flatten and un-flatten complex/nested JSON objects. It works, but it's a bit slow (triggers the 'long script' warning).
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How to print VARCHAR(MAX) using Print Statement?
...u look at my code I am also using the @Pos variable to find the line break and print accordingly. So How could I use that in your code.
– peter
Oct 21 '11 at 14:11
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Convert absolute path into relative path given a current directory using Bash
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It's a pity that the package is outdated on Ubuntu 14.04 and does not have the --relative-to option.
– kzh
Jul 21 '16 at 15:18
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How to make ThreadPoolExecutor's submit() method block if it is saturated?
...eate a ThreadPoolExecutor such that when it has reached its maximum size and the queue is full, the submit() method blocks when trying to add new tasks. Do I need to implement a custom RejectedExecutionHandler for that or is there an existing way to do this using a standard Java library?
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Most underused data visualization [closed]
Histograms and scatterplots are great methods of visualizing data and the relationship between variables, but recently I have been wondering about what visualization techniques I am missing. What do you think is the most underused type of plot?
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“Large data” work flows using pandas
...d to puzzle out an answer to this question for many months while learning pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons.
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