John questions

• ReactDOM.render is no longer supported in React 18
• Exact grep -f command in Linux
• How to find the options in if conditions of shell [duplicate]
• How to split a file lines with space and tab differentiation? [duplicate]
• How can I run a Perl script with ActivePerl?
• How to remove a particular substring from a string?
• Get the SQL query result without the table format

John answers