Use the Unofficial Bash Strict Mode (Unless You Love Debugging)
The article is dangerously wrong in its discussion of IFS.<p>What you should do to avoid the problem of mishandling spaces is use proper quoting (for i in "$@"; do ...), not changing IFS; setting IFS to \n\t will still break embedded tabs and newlines.<p>In general, in bash scripts any of use of $ should always be between double quotes unless you have a reason to do otherwise.