Bash has a ternary

Bash Parameter Expansion

• so today I learned there is a ternary like thing for bash.

Old way of doing it.

ᚱ@two-fer $ bat -p /tmp/stuff.sh
#!/bin/bash

if [ "$1" ]
then
    echo "One for $1, one for me."
    exit 0
fi

echo "One for you, one for me."


ᚱ@two-fer $ 
ᚱ@two-fer $ /tmp/stuff.sh 
One for you, one for me.
ᚱ@two-fer $ 
ᚱ@two-fer $ /tmp/stuff.sh coolguy
One for coolguy, one for me.
ᚱ@two-fer $ 

Cooler approach.

ᚱ@two-fer $ bat -p /tmp/stuff.sh
#!/bin/bash

echo "One for ${1:-you}, one for me."

ᚱ@two-fer $ 
ᚱ@two-fer $ /tmp/stuff.sh coolguy
One for coolguy, one for me.
ᚱ@two-fer $ 
ᚱ@two-fer $ 
ᚱ@two-fer $ /tmp/stuff.sh
One for you, one for me.
ᚱ@two-fer $ 

• The above example basically checks to see if the variable is set, if not, the default value will be used.