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Emulate ggplot2 default color palette
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It is just equally spaced hues around the color wheel, starting from 15:
gg_color_hue <- function(n) {
hues = seq(15, 375, length = n + 1)
hcl(h = hues, l = 65, c = 100)[1:n]
}
For example:
n = 4
cols = gg_color_hue(n)
dev.new(width = 4, height = 4)
plot(1:n, pch = 16, cex = 2...
What should I do if the current ASP.NET session is null?
...Page. So if you are calling other functionality, including static classes, from your page, you should be fine.
If you have some classes doing initialization logic during startup, for example on the Application_Start event or by using a static constructor, Session state might not be available. It all...
Why does this (null || !TryParse) conditional result in “use of unassigned local variable”?
... is, as you've shown.) I would have expected the evaluated result of true (from the first operator invocation, cause by ||) to be "passed along" to the if statement. That's certainly what would happen if you put a function call in there, for example.
– Dan Tao
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How Many Seconds Between Two Dates?
..., NN, EE, 0, 0, 0, 0);
var dif = t1.getTime() - t2.getTime();
var Seconds_from_T1_to_T2 = dif / 1000;
var Seconds_Between_Dates = Math.abs(Seconds_from_T1_to_T2);
A handy source for future reference is the MDN site
Alternatively, if your dates come in a format javascript can parse
var dif = Dat...
How to perform static code analysis in php? [closed]
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Run php in lint-mode from the command line to validate syntax without execution:
php -l FILENAME
Higher-level static analyzers include:
php-sat - Requires http://strategoxt.org/
PHP_Depend
PHP_CodeSniffer
PHP Mess Detector
PHPStan
PHP-CS-Fixe...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
..., each instance of a ## preprocessing token
in the replacement list (not from an argument) is deleted and the preceding preprocessing
token is concatenated with the following preprocessing token.
So, the replacement list contains x followed by ## and also ## followed by y; so we have:
mine ##...
How does Git handle symbolic links?
...ymlinks and the local settings for symlinks. If settings were copied over from TortiseGit or windows, then you could have symlinks = false messing with them.
– phyatt
Dec 12 '17 at 17:05
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Get and Set a Single Cookie with Node.js HTTP Server
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The cookie library is actually from the underlying library connect; you don't need to take all of express to get cookie helper.
– Ajax
Sep 3 '12 at 16:40
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Is it possible to capture a Ctrl+C signal and run a cleanup function, in a “defer” fashion?
I want to capture the Ctrl+C ( SIGINT ) signal sent from the console and print out some partial run totals.
10 Answers
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Restrict varchar() column to specific values?
...ant a check constraint.
CHECK constraints determine the valid values
from a logical expression that is not
based on data in another column. For
example, the range of values for a
salary column can be limited by
creating a CHECK constraint that
allows for only data that ranges from
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