ShellIt

Java Tricks

• Create a java classpath to be used with “-D” param in shell script:

  JARS_ARR=( `find libs/ -name "*.jar"` ) && JARS=$(printf ":%s" "${JARS_ARR[@]}")

Ruby As Shell Utils

With options -e, -n, -p, perl can do what grep/awk/sed can, what about ruby?

Let's take the result of ls -l as input and process it with ruby

grep with ruby

\ls -l | ruby -ne 'print if /^d/'

awk with ruby

\ls -l | ruby -ne 'puts split(/\s+/).last if /^d/'

sed with ruby

\ls -l | ruby -pe 'gsub /.*\s+(\S+)$/, %q|\1|'
\ls -l | ruby -pe 'gsub(/.*\s+(\S+)$/) {$1.capitalize}'

— https://gist.github.com/ryenus/1518596