Bash Array Manipulation - arrays

Question

I doing a project for a Unix/Linux class and have a few Arrays in another file, like this
All the arrays should store is a 1 or 0
T1=( 1 1 1 1 1 )
T2=( 1 1 1 1 1 )
T3=( 1 1 1 1 1 )
T4=( 1 1 1 1 1 )
T5=( 1 1 1 1 1 )
However i'm having difficulty editing the arrays to 0 and making changes stick
#!/bin/bash
i=0
for line in `cat JeopardyOut`
do
let i=i+1
#Creating one big Array with all the values from the arrays file
Array[i]=$line
done
cat JeopardyOut
#Parsing the giant Array into the main 5 arrays I'm using
createArray()
{
y=0
for y in 0 1 2 3 4
do
for i in 2 3 4 5 6
do
#echo "${Array[i]}"
T1[$y]=${Array[i]}
done
for i in 9 10 11 12 13
do
#echo "${Array[i]}"
T2[$y]=${Array[i]}
done
for i in 16 17 18 19 20
do
#echo "${Array[i]}"
T3[$y]=${Array[i]}
done
for i in 23 24 25 26 27
do
#echo "${Array[i]}"
T4[$y]=${Array[i]}
done
for i in 30 31 32 33 34
do
#echo "${Array[i]}"
T5[$y]=${Array[i]}
done
done
}
createArray
ArrayNum=$1
Index=$2
There's likely way better ways to do this, However this is what ended up working for me.
#Changing the necessary indexes, this will be used by a completely
#different script
ChangeArray()
{
if [[ $ArrayNum == "1" ]]; then
T1[ $Index ]=0
elif [[ $ArrayNum == "2" ]]; then
T2[ $Index ]=0
elif [[ $ArrayNum == "3" ]]; then
T3[ $Index ]=0
elif [[ $ArrayNum == "4" ]]; then
T4[ $Index ]=0
elif [[ $ArrayNum == "5" ]]; then
T5[ $Index ]=0
else
echo "Invalid Parameters"
fi
}
if [[ $ArrayNum -ne "" || $Index -ne "" ]]; then
if [[ $ArrayNum == "5" && $Index == "5"]]; then
reset
else
ChangeArray
fi
fi
# And the part that's likely at fault for my issue but don't know how I
# should fix it
echo "T1=( ${T1[*]} )" > JeopardyOut
echo "T2=( ${T2[*]} )" >> JeopardyOut
echo "T3=( ${T3[*]} )" >> JeopardyOut
echo "T4=( ${T4[*]} )" >> JeopardyOut
echo "T5=( ${T5[*]} )" >> JeopardyOut
cat JeopardyOut
Something is wrong with the way I am trying to edit the Arrays...
While I can get any index of any of the arrays to 0, I do not know why the 1s I change to 0 turn back into 1 when I rerun the script.
PS. This is a basis class for Linux programming in Sierra, I don't really understand a lot of the bash script other than what I've learned through trial and error.

Answer 1

Maybe this example can help you
#!/bin/bash
while read -r line; do
#Creating one big Array with all the values from the arrays file
Array+=(`grep -oP '\(\K(.+?)(?=\))' <<< "$line"`)
done < JeopardyOut
echo "Giant Array value: ${Array[#]}"
# Or you can clone the arrays in the file
i=0
while read -r line; do
((i++))
eval "T$i=(`grep -oP '\(\K(.+?)(?=\))' <<< "$line"`)"
done < JeopardyOut
echo "This is the contents of array T1: ${T1[#]}"
echo "This is the contents of array T2: ${T2[#]}"
echo "This is the contents of array T3: ${T3[#]}"
echo "This is the contents of array T4: ${T4[#]}"
echo "This is the contents of array T5: ${T5[#]}"
# This can help you to make a new file
# I change some value to our arrays
T1[2]=0
T2[1]=true
# Now let's go to make a new arrays file
echo "T1=(${T1[#]})" > JeopardyOut2
echo "T2=(${T2[#]})" >> JeopardyOut2
echo "T3=(${T3[#]})" >> JeopardyOut2
echo "T4=(${T4[#]})" >> JeopardyOut2
echo "T5=(${T5[#]})" >> JeopardyOut2
echo "This is the content of JeopardyOut2:"
cat JeopardyOut2
Output
$ bash example
Giant Array value: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
This is the contents of array T1: 1 1 1 1 1
This is the contents of array T2: 1 1 1 1 1
This is the contents of array T3: 1 1 1 1 1
This is the contents of array T4: 1 1 1 1 1
This is the contents of array T5: 1 1 1 1 1
This is the content of JeopardyOut2:
T1=(1 1 0 1 1)
T2=(1 true 1 1 1)
T3=(1 1 1 1 1)
T4=(1 1 1 1 1)
T5=(1 1 1 1 1)
$