sankars

sudo apt-get update
sudo apt-get install openssh-server
sudo ufw allow 22

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vector <- c(45, 5, 64, 80)

tail(vector, 1)

vector[length(vector)]

last <- function(x) { tail(x, n = 1) }
last(vector)

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public enum Blah {
  A("text1"),
  B("text2"),
  C("text3"),
  D("text4");

  private String text;

  Blah(String text) {
    this.text = text;

sankars

## only print filename instead of full path

find /dir1 -type f -printf "%f\n"
find /dir1 -type f -exec basename {} \;

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# http://stackoverflow.com/questions/4984725/how-to-test-cron-job

run-parts -v /etc/cron.weekly

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# http://stackoverflow.com/questions/7706876/r-script-removing-na-values-from-a-vector
# Sort vectors that have 'NA'

d <- c(1, 100, NA, 10)
max(d, na.rm=TRUE)

# Remove 'NA' in a vector

d <- d[!is.na(d)]

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# http://stackoverflow.com/questions/471183/linux-command-line-global-search-and-replace

# not recursive. input the file name

sed -i 's/foo/bar/g' *

# recursive

find -name '*.html' -print -exec sed -i.bak 's/foo/bar/g' {} \;

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 // http://stackoverflow.com/questions/22713652/can-an-interface-method-have-a-body
 
 
 // define static method
 interface Whoa {
        public static void doStuff() {
            System.out.println("This is not default implementation");
        }
 }

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public class Joda implements Directions
{ 
	public static void main(String [] args)
	{
	  
	  // From http://stackoverflow.com/questions/1555262/calculating-the-difference-between-two-java-date-instances
	  
		Interval interval = new Interval(oldTime, new Instant());
		

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# From http://stackoverflow.com/questions/7004710/laply-is-part-of-what-package-in-r

install.packages("pkg")

library("pkg")