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Difference between a theta join, equijoin and natural join
...gebra when it comes to theta joins, equijoins and natural joins. Could someone please help me better understand it? If I use the = sign on a theta join is it exactly the same as just using a natural join?
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Delete all but the most recent X files in bash
...mplex).
Here's a pragmatic, POSIX-compliant solution that comes with only one caveat: it cannot handle filenames with embedded newlines - but I don't consider that a real-world concern for most people.
For the record, here's the explanation for why it's generally not a good idea to parse ls outp...
NPM doesn't install module dependencies
...ependencies https://github.com/npm/npm/issues/2442 (closed)
In the first one people list several workarounds that you may try.
An alternative solution may be (a little hackish) to explicitly list the dependencies as first level dependents. This requires you to maintain the list but practically it...
String slugification in Python
...does a bit more than what you posted (take a look at the source, it's just one file). The project is still active (got updated 2 days before I originally answered, over seven years later (last checked 2020-06-30), it still gets updated).
careful: There is a second package around, named slugify. If y...
What is the bit size of long on 64-bit Windows?
Not to long ago, someone told me that long are not 64 bits on 64 bit machines and I should always use int . This did not make sense to me. I have seen docs (such as the one on Apple's official site) say that long are indeed 64 bits when compiling for a 64-bit CPU. I looked up what it was on 64-...
Implements vs extends: When to use? What's the difference?
...from C++ (referring to classes that inherit characteristics from more than one other class), Java does not allow this, but it does have keyword interface, which is sort of like a pure virtual class in C++. As mentioned by lots of people, you extend a class (and you can only extend from one), and yo...
Take a char input from the Scanner
...from Scanner.next:
char c = reader.next().charAt(0);
To consume exactly one character you could use:
char c = reader.findInLine(".").charAt(0);
To consume strictly one character you could use:
char c = reader.next(".").charAt(0);
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Versioning SQL Server database
I want to get my databases under version control. Does anyone have any advice or recommended articles to get me started?
2...
How to select date from datetime column?
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tried this one : Where DATE(datetime) = '2009-10-20', it works
– mysqllearner
Nov 18 '09 at 8:48
44
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What does send() do in Ruby?
Can someone please tell me what
6 Answers
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