Stupid Bash Tricks

concat.sh

a="hello"
b="world"

c=$a" there, isn't it a wonderful "$b"?"

echo $c

return-value.sh

function hello-world {
  local __resultvar=$1
  local __blah="Hello, world!"
  eval $__resultvar="'$__blah'"
}

hello-world foo
echo $foo

slash-r.sh

for i in {1..100}; do 
  echo -ne "\r$i" 
  sleep .5
done
echo