[SOLVED] if clause containing AND logic operator not working

Issue

I'm building a bash script which have 2 conditions within an IF statement, linked by an AND logic operator, but it complains when executing. Just for the record, if I run each condition in it's unique IF, both works just fine. Problem arises when I try to execute both glued by the -a (AND) operator. Here it is:

if [[ "$1" =~ ".com" -a test "$#" -eq 1 ]]
then
echo "olalá"
fi

I'll appreciate any tip on this issue.

Solution

-a is the AND operator in a [ ] test expression, but [[ ]] conditional expressions use && instead. Also, there is a stray test in the expression that doesn't belong there at all. Here's the corrected version:

if [[ "$1" =~ ".com" && "$#" -eq 1 ]]

You could equivalently use two separate [[ ]] expressions and use && between them:

if [[ "$1" =~ ".com" ]] && [[ "$#" -eq 1 ]]

(If you were using [ ] expressions, this would be the preferred method because of ambiguities in the syntax involving -a, -o, and such; but with [[ ]], there's no ambiguity and either method works fine.)

Answered By - Gordon Davisson

Answer Checked By - Terry (WPSolving Volunteer)