Shell Programming and Scripting

Code:

echo $BASH_VERSION
shopt -s nocasematch
shopt nocasematch | grep nocasematch
if [[ "$1" =~ "(test)" ]]; then
  echo match 1
else
  echo no match 1
fi

if [[ "$1" =~ \(test\) ]]; then
  echo match 2
else
  echo no match 2
fi

if [[ "$1" =~ '(test)' ]]; then
  echo match 3
else
  echo no match 3
fi

if [[ "$1" =~ (test) ]]; then
  echo match 4
else
  echo no match 4
fi

Code:

$ xx.sh Test
3.1.0(1)-release
nocasematch     on
match 1
match 2
match 3
xx.sh: line 25: unexpected argument `(' to conditional binary operator
xx.sh: line 25: syntax error near `(t'
xx.sh: line 25: `if [[ "$1" =~ (test) ]]; then'

Code:

$ xx.sh Test
3.2.33(8)-release
nocasematch     on
no match 1
no match 2
no match 3
match 4

Code:

$ xx.sh Test
4.0.0(2)-release
nocasematch     on
no match 1
no match 2
no match 3
match 4