Zsh and Bash Array Shift (remove first item from the Array)

bash-array-shift.sh

array=(foo, bar, baz)
echo ${array[@]} # => foo, bar, baz

array=("${array[@]:1}")
echo ${array[@]} # => bar, baz

array=("${array[@]:1}")
echo ${array[@]} # => baz

zsh-array-shift.sh

array=(foo, bar, baz)
echo $array # => foo, bar, baz

array=("${(@)array:1}")
echo $array # => bar, baz

array=("${(@)array:1}")
echo $array # => baz

# UPDATE: this works as well and is less confusing syntax
array=(${array:1})

Be aware that you'll get the trailing , when extracting an item from the Array.

To work around that, you need to first get the index of the , and then substring it out...

PIPELINE="foo, bar, baz"
ARRAY=($PIPELINE)                # Converting the build parameter into an Array
PROJECT=${ARRAY[0]}              # Extract first element
INDEX=$(expr index "$PROJECT" ,) # Get index of the , character
PROJECT=${PROJECT:0:index-1}     # Reassign PROJECT variable without , character

You can also avoid ALL of this if you don't make it a comma separated list

For zsh (might work in bash too) (might require some options)

array=($array[2,-1])

or destructively

shift array