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add equivalent to bash command

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SabryTarek 2021-04-16 13:49:26 +00:00
parent 016c07af64
commit f806fefafb
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languages/bash.sh
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@ -192,6 +192,7 @@ declare -r # makes the variables read-only
declare -x # marks the variables for export via the environment declare -x # marks the variables for export via the environment
${varname:-word} # if varname exists and isn't null, return its value; otherwise return word ${varname:-word} # if varname exists and isn't null, return its value; otherwise return word
${varname:word} # if varname exists and isn't null, return its value; otherwise return word
${varname:=word} # if varname exists and isn't null, return its value; otherwise set it word and then return its value ${varname:=word} # if varname exists and isn't null, return its value; otherwise set it word and then return its value
${varname:?message} # if varname exists and isn't null, return its value; otherwise print varname, followed by message and abort the current command or script ${varname:?message} # if varname exists and isn't null, return its value; otherwise print varname, followed by message and abort the current command or script
${varname:+word} # if varname exists and isn't null, return word; otherwise return null ${varname:+word} # if varname exists and isn't null, return word; otherwise return null