oplex/command_substitution_bash.md

## command_substitution_bash.md

      
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              command_substitution_bash.md
            
          
    Substitute commands

Document structure
{COMMAND}
{EXAMPLE #COMMENT}
{LINK(if any source)}


$()
myvar=($PWD) #command substitution, expands the current directory to variable


<()
\missing example\ #process substitution. Resort to if piping does not work. MORE:
https://superuser.com/questions/1059781/what-exactly-is-in-bash-and-in-zsh