Check if a variable is present in an array using shell script
Check if a variable is present in an array using shell script
An array is like a list of elements, you can refer to specific elements in an array with indices. For instance myarray[i] refers to the i th element in an array named myarray. Here i am using korn shell.
We can use the below shell script in order to search for an element and return a unique output if it is present in the array or not.
This script simply helps you to check whether a variable is present inside an array.
First initialize the array element using set command.
set -A myarray data1 data2 data3 data4
Now create a script that will search whether a variable is present in an array or not.
if [[ " ${myarray[*]} " == *" $1 "* ]]; then
check_val=$1
echo "Found Element "$check_val
else
check_val=$1
echo "Did Not Find Element Named "$check_val
fi
$1 represent the first argument passed to the script.
Please find the complete script below.
set -A myarray data1 data2 data3 data4
if [[ " ${myarray[*]} " == *" $1 "* ]]; then
check_val=$1
echo "Found Element "$check_val
else
check_val=$1
echo "Did Not Find Element Named "$check_val
fi
Save the script as check.sh
Usage
./check.sh data1
The output of the above command will be
Found Element data1
You can also add this shell script as a function and call it at any time you need. All you have to do is just enclose the script inside
function SOME_FUNCTION_NAME
{
set -A myarray data1 data2 data3 data4
if [[ " ${myarray[*]} " == *" $1 "* ]]; then
check_val=$1
echo "Found Element "$check_val
else
check_val=$1
echo "Did Not Find Element Named "$check_val
fi
}
#Call the function
SOME_FUNCTION_NAME "CheckThisElement"
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