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What is the difference between UNION and UNION ALL?

What is the difference between UNION and UNION ALL ? 26 Answers 26 ...
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On design patterns: When should I use the singleton?

...ptable" reasons to use a Singleton. One reason that tends to come up over and over again on the internets is that of a "logging" class (which you mentioned). In this case, a Singleton can be used instead of a single instance of a class because a logging class usually needs to be used over and over ...
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Something better than .NET Reflector? [closed]

...h is absolutely ridiculous), half the time the update doesn't go smoothly, and it is increasingly hindering my productivity with each update. I am sick of it, and I am ready for something better. Is there a better disassembler? ...
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Can you put two conditions in an xslt test attribute?

Is this right for When 4 < 5 and 1 < 2 ? 4 Answers 4 ...
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What is the exact meaning of Git Bash?

...I know now the basic operations such as commit , push , pull , fetch , and merge . But I still don't know what Git Bash itself actually is! ...
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How do I get the row count of a pandas DataFrame?

I'm trying to get the number of rows of dataframe df with Pandas, and here is my code. 14 Answers ...
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Can you use a trailing comma in a JSON object?

...ed to worry about all browsers. In general I try turn the problem around, and add the comma before the actual value, so you end up with code that looks like this: s.append("["); for (i = 0; i &lt; 5; ++i) { if (i) s.append(","); // add the comma only if this isn't the first entry s.appendF("\"...
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How do I check if a string is valid JSON in Python?

... can do something else with it. So far, I've only gotten the error message and type. – Joey Blake Apr 1 '11 at 12:36 2 ...
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Using sphinx with Markdown instead of RST

...o approach that without developing a parser from scratch: You could cheat and write a "parser" that uses Pandoc to convert markdown to RST and pass that to the RST parser :-). You can use an existing markdown-&gt;XML parser and transform the result (using XSLT?) to the docutils schema. You could ...
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Explanation of BASE terminology

...e system unavailable (or inconsistent). So you can see that 'availability' and 'partition tolerance' go hand in hand. There's more detail on this in this article. – Niels van der Rest Apr 14 '14 at 18:29 ...