(Usually) The right way. if [ -z ${var+x} ]; then echo "var is unset"; else echo "var is set to '$var'"; fi. where ${var+x} is a parameter expansion which ... ... <看更多>
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(Usually) The right way. if [ -z ${var+x} ]; then echo "var is unset"; else echo "var is set to '$var'"; fi. where ${var+x} is a parameter expansion which ... ... <看更多>
Bash doesn't have any special values for True or False , so the only "false" value is 0. Then, a variable can be set to an empty string or it ... ... <看更多>
Bash : Print variables using indirect references, with introduction to array data types. September 30, 2019 -. Tags: linux, shell_scripting. ... <看更多>
Node Version Manager - POSIX-compliant bash script to manage multiple active ... If the environment variable $XDG_CONFIG_HOME is present, it will place the ... ... <看更多>