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What is the difference between CHARACTER VARYING and VARCHAR in PostgreSQL?
...rchar, so no difference, see documentation :)
The notations varchar(n) and char(n)
are aliases for character varying(n)
and character(n), respectively.
character without length specifier is
equivalent to character(1). If
character varying is used without
length specifier, the type ac...
What is Compass, what is sass…how do they differ?
I would like to start using compass and sass to speed up development. At the moment, I have installed Sass on a mac and instructed it to watch scss file for input, and a css file for generated output.
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Python if-else short-hand [duplicate]
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The most readable way is
x = 10 if a > b else 11
but you can use and and or, too:
x = a > b and 10 or 11
The "Zen of Python" says that "readability counts", though, so go for the first way.
Also, the and-or trick will fail if you put a variable instead of 10 and it evaluates to Fals...
How to set xlim and ylim for a subplot in matplotlib [duplicate]
I would like to limit the X and Y axis in matplotlib but for a speific subplot. As I can see
subplot figure itself doesn't have any axis property. I want for example to change only the limits for the second plot!
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mongodb, replicates and error: { “$err” : “not master and slaveOk=f...
mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435出现这个错误的原因是在从库上执行命令导致，默认情况下只有主库可以执行命令。当然可以通过设置使得从库也能执行命令，具体参见：http: s 出现...
javascript: recursive anonymous function?
...ive the function a name, even when you're creating the function as a value and not a "function declaration" statement. In other words:
(function foo() { foo(); })();
is a stack-blowing recursive function. Now, that said, you probably don't may not want to do this in general because there are som...
Is there a point to minifying PHP?
...y question is: would clients see a visible speed improvement in page loads and such if I were to minify my PHP?
7 Answers
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Detect changed input text box
I've looked at numerous other questions and found very simple answers, including the code below. I simply want to detect when someone changes the content of a text box but for some reason it's not working... I get no console errors. When I set a breakpoint in the browser at the change() functio...
javac not working in windows command prompt
I'm trying to use javac with the windows command prompt, but it's not working.
17 Answers
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SET NOCOUNT ON usage
.... There are some cases though, where calculating the number of rows beforehand would impact the performance, such as a forward-only cursor. In that case NOCOUNT might be a necessity. Other than that, there is absolutely no need to follow "use NOCOUNT wherever possible" motto.
Here is a very detaile...