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What is the most idiomatic way in Bash to test if no positional parameters are given? There are so many ways to check this, I wonder if there is one preferred way.
Some ways are:
((! $# )) # check if $# is 'not true'
(($# == 0)) # $# is 0
[[ ! $@ ]] # $@ is unset or null
For me, the classical way is: