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Explore Stack Internalbash function that works for both scalar and array types:
has_declare() { # check if variable is set at all local "$@" # inject 'name' argument in local scope &>/dev/null declare -p "$name" # return 0 when var is present } if has_declare name="vars_name" ; then echo "variable present: vars_name=$vars_name" fi bash function that works for both scalar and array types:
has_declare() { # check if variable is set at all local "$@" # inject 'name' argument in local scope &>/dev/null declare -p "$name" # return 0 when var is present } if has_declare name="vars_name" ; then echo "variable present: vars_name=$vars_name" fi bash function that works for both scalar and array types:
has_declare() { # check if variable is set at all local "$@" # inject 'name' argument in local scope &>/dev/null declare -p "$name" # return 0 when var is present } if has_declare name="vars_name" ; then echo "variable present: vars_name=$vars_name" fi bash function that works for both scalar and array types:
has_declare() { # check if variable is set at all local "$@" # inject 'name' argument in local scope &>/dev/null declare -p "$name" # return 0 when var is present } if has_declare name="vars_name" ; then echo "variable present: vars_name=$vars_name" fi