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What is the most efficient/elegant way to parse a flat table into a tree?
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Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL...
Reading a key from the Web.Config using ConfigurationManager
...swer, I tried as you recommended and still get the same result. I actually now get a NullReferenceException on the ToString()
– twal
Jan 4 '11 at 15:37
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Most simple but complete CMake example
...eant to be written, it vanishes in the next example I read. All I want to know is, how should I structure my project, so that my CMake requires the least amount of maintainance in the future. For example, I don't want to update my CMakeList.txt when I am adding a new folder in my src tree, that work...
JavaScript dependency management: npm vs. bower vs. volo [closed]
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@Nate The name is simply where it started. NPM is now a very general purpose package management system. I regularly use npm to install front-end modules. There is no difference in using NPM for commonjs modules, vs amd, vs anything else. You could use npm just as well for no...
How to check file MIME type with javascript before upload?
... that the file MIME type could be checked using javascript on client side. Now, I understand that the real validation still has to be done on server side. I want to perform a client side checking to avoid unnecessary wastage of server resource.
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Why use apparently meaningless do-while and if-else statements in macros?
...say you
had something like your second macro.
#define BAR(X) f(x); g(x)
Now if you were to use BAR(X); in an if ... else statement, where the bodies of the if statement were not wrapped in curly brackets, you'd get a bad surprise.
if (corge)
BAR(corge);
else
gralt();
The above code would e...
How do I URl encode something in Node.js?
...uerystring.stringify() (in Nicolas' answer) seem to return an empty string now.
– brandonscript
May 13 '16 at 18:18
4
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Difference between variable declaration syntaxes in Javascript (including global variables)?
...undefined.
This only applies to the window object, and only (as far as I know) to IE8 and earlier (or IE9-IE11 in the broken "compatibility" mode). Other browsers are fine with deleting window properties, subject to the rules above.
When var happens
The variables defined via the var statement a...
Python Selenium accessing HTML source
...tml_soup: BeautifulSoup = BeautifulSoup(html_source_code, 'html.parser')
Now you can apply BeautifulSoup function to extract data...
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Is it better to call ToList() or ToArray() in LINQ queries?
... make it into Gen 2 then you may be better off paying the extra allocation now vs polluting the Gen 2 heap. IME though I rarely see this. It's much more common to see ToArray being passed immediately to another short lived LINQ query.
– JaredPar
May 1 '13 at 1...