Periodic Table Database - Build a Periodic Table Database

Backend Development
1

Tell us what’s happening:

I can’t seem to pass the script tests, despite outputting the correct results.
Part of my code, under a spoiler since it’s a required project:

Check the data type of the input value

if [[ “$1” =~ [1]+$ ]]; then
# Integer case: Search by atomic number
ATOMIC_NUMBER=$($PSQL “SELECT atomic_number FROM elements WHERE atomic_number = $1”)
# Symbol case: Search by symbol
elif [[ $1 =~ [2]{1,2}$ ]]; then
ATOMIC_NUMBER=$($PSQL “SELECT atomic_number FROM elements WHERE symbol = ‘$1’”)
# Name case: Search by name
elif [[ $1 =~ [3]{3,40}$ ]]; then
ATOMIC_NUMBER=$($PSQL “SELECT atomic_number FROM elements WHERE name = ‘$1’”)
fi

check if element was found

if [[ -z $ATOMIC_NUMBER ]]; then
echo -e “\nI could not find that element in the database.”
exit 1
fi

[…]

echo -e “\nThe element with atomic number $ATOMIC_NUMBER is $NAME ($SYMBOL). It’s a $TYPE, with a mass of $MASS amu. $NAME has a melting point of $MELTING_POINT celsius and a boiling point of $BOILING_POINT celsius.”

else

echo -e “\nPlease provide an element as an argument.”

fi

Can provide more snippets, or full code if needed.

I’ve run ./elements several times with the same result:

image
image1661×368 38 KB

Tried with He:

image
image1650×363 37.5 KB

Tried with non-existent elements:

image
image717×280 20.5 KB

Did it with no argument:
image

Still:

image
image1662×302 15.7 KB

Tried refreshing, closing, restarting PC.
The code might look a bit messy, I tried rewriting several parts several times already, and switching approaches.

Any help or suggestions would be appreciated, thank you!

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Challenge Information:

Periodic Table Database - Build a Periodic Table Database

  1. 0-9 ↩︎

  2. A-Za-z0-9 ↩︎

  3. A-Za-z0-9 ↩︎

2

I removed the newline everywhere, and it almost works*

If the argument input to your element.sh script doesn’t exist as an atomic_number , symbol , or name in the database, the only output should be I could not find that element in the database.

^This is the only test I’m not passing.

*changed from:
echo -e "\nPlease provide an element as an argument."
to:
echo "Please provide an element as an argument.."

3 
# check if element was found
if [[ -z $ATOMIC_NUMBER ]]; then
  echo "I could not find that element in the database."
  exit 0
fi
# obtain all other properties

It was supposed to be an exit code success, I wrote as failure
i.e. exit 1