# playing on the Desktop

cd ${HOME}/Desktop
ls
ls script*
ls *.sh
ls *_6*
nano solution*
ls *.sh *.txt
ls s*t*
ls [hi]*
ls [c-i]*
ls [A-Z]*
ls -d [A-Z]*


# using the "check_regex.sh" script

./check_regex.sh 'this is Bash' 'Bash'
./check_regex.sh 'this is Bash' 'bash'
./check_regex.sh 'this is Bash' '[Bb]ash'
./check_regex.sh 'this is Bash' '[Bb]'
./check_regex.sh 'this is Bash' '[^Bb]'
./check_regex.sh 'this is Bash' '[^Kk]'
./check_regex.sh 'this is Bash' '[Kk]'
./check_regex.sh 'this is Bash' '[aeiou]'
./check_regex.sh 'this is Bash' '[^aeiou]'

./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "[0-9]{4}-[0-9]{2}-[0-9]{2}"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "[0-9]{4}(-[0-9]{2}){2}"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "(-[0-9]{2}){3}"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "(-?[0-9]{2}){3}"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "(20[01][0-9]|202[012])-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "(19[5-9][0-9]|20[01][0-9]|202[012])-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "(194[6-9]|19[5-9][0-9]|20[01][0-9]|202[012])-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])"

./check_regex.sh "today is 2022-02-17 in ISO 8601 format" $(date +'%F')
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" '$(date +'%F')'
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'%F')"
./check_regex.sh "today is 2022-17-02 in ISO 8601 format" "$(date +'%F')"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "^$(date +'%F')"
./check_regex.sh "2022-02-17 in ISO 8601 format" "^$(date +'%F')"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'%F')$"
./check_regex.sh "today is 2022-02-17" "$(date +'%F')$"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "^$(date +'%F')$"
./check_regex.sh "2022-02-17" "^$(date +'%F')$"

./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'%Y')"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'%d')"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'%m')"
./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'-%m-')"

./check_regex.sh "today is 2022-02-17 in ISO 8601 format" "$(date +'%T')"
./check_regex.sh "19:33:01 in ISO 8601 format" "$(date +':%M:')"