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Simple logical operators in Bash
...o test if a file exists. There are also string equality operators: "$string1" == "$string2" (beware that the right-hand side is a pattern, e.g. [[ $foo == a* ]] tests if $foo starts with a while [[ $foo == "a*" ]] tests if $foo is exactly a*), and the familiar !, && and || operators for nega...
Using a remote repository with non-standard port
...epository. The remote repository is being served on a non-standard port (4019).
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How to count the number of set bits in a 32-bit integer?
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serve current directory from command line
...o remember, so I just have this in my .bashrc:
function serve {
port="${1:-3000}"
ruby -run -e httpd . -p $port
}
It serves the current directory on port 3000 by default, but you can also specify the port:
~ $ cd tmp
~/tmp $ serve # ~/tmp served on port 3000
~/tmp $ cd ../www
~/www $ se...
How to refresh / invalidate $resource cache in AngularJS
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Keep the boolean and get the $http cache:
var $httpDefaultCache = $cacheFactory.get('$http');...
How do I output coloured text to a Linux terminal?
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How to convert a Drawable to a Bitmap?
...s accept Bitmap s only. I cannot use WallpaperManager because I'm pre 2.1.
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Omit rows containing specific column of NA
...ses function and put it into a function thusly:
DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA), z=c(NA, 33, 22))
completeFun <- function(data, desiredCols) {
completeVec <- complete.cases(data[, desiredCols])
return(data[completeVec, ])
}
completeFun(DF, "y")
# x y z
# 1 1 0 ...
Choosing the default value of an Enum type without having to change values
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