function that allows different outputs dependent on argument values

Question

With the following function I want to be able to call it with nico-usage or with a numeric value to print a different string.

Con this be cleaned up or made easier.

nico-usage ()
 {

  local docstrg_lang="
 {-V, --version}, {-u, --usage}, {-h, --help}
 -s SCAL, --scale SCAL"

  local docstrg_usage="
 nicolaus -s 0.5 -aq 3"

  usg=$1
  if (( usg == 1 )); then
    echo "$docstrg_lang"
  elif (( usg == 2 )); then
    echo "$docstrg_usage"
  else
    echo "$docstrg_lang"
  fi

 }

Should checking $1 be enough or would one also test for $# ? — Vera
– Vera, Commented Jan 24, 2023 at 18:12
That depends on your needs. You can dispatch based on $1 and then check for the existence of $2 in case of -s, --scale and the undocumented -aq. — nohillside
– nohillside, Commented Jan 24, 2023 at 19:34
This is only supposed to test for numeric value only, for nico-usage, nico-usage 1, nico-usage 2. — Vera
– Vera, Commented Jan 24, 2023 at 19:39

White Owl · Accepted Answer · 2023-01-24 19:50:09Z

0

If the question is how to make it pretty, here is a variant:

nico-usage ()
{
   if (( $1 == 2 )) ; then
     echo -e "\nnicolaus -s 0.5 -aq 3"
   else
     echo -e "\n{-V, --version}, {-u, --usage}, {-h, --help} -s SCAL, --scale SCAL"
   fi
}

answered Jan 24, 2023 at 19:50

White Owl

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