Convoluted Variable Assignment

[Matuku]

I'm relatively new at Bash programming so I'm probably just violating a very simple rule which makes this unable to work. What I'm trying to do is generate a list of the form:



Adam 1
Adam 2
Adam 3
...

Brent 23
Brent 24
...
Coby 31
Coby 32


The script I made for this is (at the moment it's still a work in progress so should only output "Adam 6 Brent 40 Coby 35":


#!/bin/bash

name1="Adam"
name2="Brent"
name3="Coby"
${name1}Number=6
${name2}Number=40
${name3}Number=35

for name in $name1 $name2 $name3
do
for number in $"${name}"Number
do
echo "$name $number"
done
echo
done



But I keep getting this output (Test1 is the filename):


./Test1: line 27: AdamNumber=6: command not found
./Test1: line 28: BrentNumber=40: command not found
./Test1: line 29: CobyNumber=35: command not found
Adam AdamNumber

Brent BrentNumber

Coby CobyNumber


Why does it think the NameNumber variables are commands? What am I doing wrong?

[Arndt]

I'm relatively new at Bash programming so I'm probably just violating a very simple rule which makes this unable to work. What I'm trying to do is generate a list of the form:



Adam 1
Adam 2
Adam 3
...

Brent 23
Brent 24
...
Coby 31
Coby 32


The script I made for this is (at the moment it's still a work in progress so should only output "Adam 6 Brent 40 Coby 35":


#!/bin/bash

name1="Adam"
name2="Brent"
name3="Coby"
${name1}Number=6
${name2}Number=40
${name3}Number=35

for name in $name1 $name2 $name3
do
for number in $"${name}"Number
do
echo "$name $number"
done
echo
done



But I keep getting this output (Test1 is the filename):


./Test1: line 27: AdamNumber=6: command not found
./Test1: line 28: BrentNumber=40: command not found
./Test1: line 29: CobyNumber=35: command not found
Adam AdamNumber

Brent BrentNumber

Coby CobyNumber


Why does it think the NameNumber variables are commands? What am I doing wrong?

It only recognizes literal names followed by an equal sign as variable assignments. What you are doing is convoluted, but not nonsensical. You can use 'eval' to do an extra expansion. It turns this is needed in other places too. Here is what I came up with:


#! /bin/bash

name1="Adam"
name2="Brent"
name3="Coby"
eval "${name1}Number=6"
eval "${name2}Number=40"
eval "${name3}Number=35"

for name in $name1 $name2 $name3
do
name=${name}Number
eval "n=\$$name"
for number in `seq 1 $n`
do
echo "$name $number"
done
echo
done

[kaibob]

I've been working to learn bash arrays and decided to use the question raised by the OP as practice. I came up with the following.


#!/bin/bash

name[0]="Adam"
name[1]="Brent"
name[2]="Coby"

number[0]=2
number[1]=4
number[2]=6

for i in ${!name[@]} ; do
for j in $(seq ${number[i]}) ; do
echo "${name[i]}${j}"
done
done