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if [ ${x} -eq 12 ] && [ $(echo "$f" | grep -Ec ".sql$") -eq 0 ];

Drop the first square bracket and add one to the second test.

For checking if pattern is not matching use logical not !
[[ ! "$F" =~ \.c$ ]] && # action
Or put action in else part:
[[ "$F" =~ \.c$ ]] && # matched action || # unmatched action

These are Shell Parameter Expansion (http://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html)

Below line is using regexp comparison operator =~ to check if line has...

Here is another bash solution:
#!/bin/bash

while read line
do
[[ "$line" =~ "=" ]] && ptype="${line%% *}"

fname="${line#*=}"

for F in ${fname}
do
...

You could use a "#" to start the header lines and then test inside the loop:
[[ ${line[0]} == "#" ]] && continue
Or, you could set a boolean when the first = is encountered and test for that later...

Perhaps something like this is more what you are looking for:
#!/bin/bash
while read -a line
do
if [[ ${line[1]} == "=" ]]; then
ptype=${line[0]}
unset line[0] line[1]
fi
for...

One way might be:
awk '{$1=$1; sub($1 FS $2 FS,x)}1' RS= file
But only if the empty lines are completely empty (contain no whitespace).

Try this awk script...
awk -F"[=]" 'BEGIN{RS=""} {print $2}' test.dat

What exactly do you mean by the above statement...and for validation you would need to initialise an associative array with...

If your definition of valid strings is only alphabets, then try:
#!/bin/bash

while IFS="=" read v1 v2
do
[[ "$v1" =~ ^[[:alpha:]]+$ ]] && echo "String: \"$v1\" is valid" || echo...

Bumping up posts or double posting is not permitted in these forums.

Please read the rules (https://www.unix.com/misc.php?do=cfrules), which you agreed to when you registered, if you have not...

First operand is checking if string value: $driverName is equal to NULL ""

Second operand appears to be calling a function: checkFile by passing string value: $driverName as argument and checking...