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Looping without brace expansion

0

I'm using a blackbox CLI based on Bash and I'm not entirely sure what stuff I can use.
Brace expansion doesn't work, and with it goes my ability to do loops without listing the arguments explicitly, which is something I was trying to avoid by looping to start with.

for x in 1..5
do
 for y in a..c
 do
 echo $HOME$x$y
 done
done

How do I run something like this without brace expansion and without listing the arguments explicitly? Environment variables should also work, that's why I appended a random $HOME to the example.

Please feel free to provide different alternatives (AWK, sed) as I'm not entirely sure what will and what won't work.

bash shell-script shell

share|improve this question

asked 3 hours ago

CharacterClassCharacterClass

103

New contributor

CharacterClass is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Do you have access to the jot command?
  
  – Fox
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  So this appears to be not based on Bash based on your description; what makes you think that it is? Is there any further detail available about the system, the shell that's in it, or the tools that are available there?
  
  – Michael Homer
  2 hours ago
  
  

  
  
  
  

add a comment | 

0

I'm using a blackbox CLI based on Bash and I'm not entirely sure what stuff I can use.
Brace expansion doesn't work, and with it goes my ability to do loops without listing the arguments explicitly, which is something I was trying to avoid by looping to start with.

for x in 1..5
do
 for y in a..c
 do
 echo $HOME$x$y
 done
done

How do I run something like this without brace expansion and without listing the arguments explicitly? Environment variables should also work, that's why I appended a random $HOME to the example.

Please feel free to provide different alternatives (AWK, sed) as I'm not entirely sure what will and what won't work.

bash shell-script shell

share|improve this question

asked 3 hours ago

CharacterClassCharacterClass

103

New contributor

CharacterClass is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Do you have access to the jot command?
  
  – Fox
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  So this appears to be not based on Bash based on your description; what makes you think that it is? Is there any further detail available about the system, the shell that's in it, or the tools that are available there?
  
  – Michael Homer
  2 hours ago
  
  

  
  
  
  

add a comment | 

I'm using a blackbox CLI based on Bash and I'm not entirely sure what stuff I can use.
Brace expansion doesn't work, and with it goes my ability to do loops without listing the arguments explicitly, which is something I was trying to avoid by looping to start with.

for x in 1..5
do
 for y in a..c
 do
 echo $HOME$x$y
 done
done

How do I run something like this without brace expansion and without listing the arguments explicitly? Environment variables should also work, that's why I appended a random $HOME to the example.

Please feel free to provide different alternatives (AWK, sed) as I'm not entirely sure what will and what won't work.

bash shell-script shell

share|improve this question

asked 3 hours ago

CharacterClassCharacterClass

103

New contributor

CharacterClass is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

for x in 1..5
do
 for y in a..c
 do
 echo $HOME$x$y
 done
done

share|improve this question

asked 3 hours ago

CharacterClassCharacterClass

103

New contributor

CharacterClass is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 3 hours ago

CharacterClassCharacterClass

103

New contributor

CharacterClass is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

CharacterClassCharacterClass

103

New contributor

CharacterClass is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

CharacterClassCharacterClass

103

1 Answer
1

active

oldest

votes

0

You'd better use jot as commented. Here is a (not so pretty) awk implementation.

#!/usr/bin/awk -f
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "%s%d%c ",ENVIRON["HOME"],i,j; 
 print;

or (you may also use the -v option of awk to assign shell variables to awk variables)

#!/bin/bash
awk -f /dev/fd/3 3<< EOF 
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "$HOME%d%c ",i,j;
 print;

EOF

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325

add a comment | 

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0

You'd better use jot as commented. Here is a (not so pretty) awk implementation.

#!/usr/bin/awk -f
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "%s%d%c ",ENVIRON["HOME"],i,j; 
 print;

or (you may also use the -v option of awk to assign shell variables to awk variables)

#!/bin/bash
awk -f /dev/fd/3 3<< EOF 
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "$HOME%d%c ",i,j;
 print;

EOF

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325

add a comment | 

0

You'd better use jot as commented. Here is a (not so pretty) awk implementation.

#!/usr/bin/awk -f
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "%s%d%c ",ENVIRON["HOME"],i,j; 
 print;

or (you may also use the -v option of awk to assign shell variables to awk variables)

#!/bin/bash
awk -f /dev/fd/3 3<< EOF 
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "$HOME%d%c ",i,j;
 print;

EOF

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325

add a comment | 

You'd better use jot as commented. Here is a (not so pretty) awk implementation.

#!/usr/bin/awk -f
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "%s%d%c ",ENVIRON["HOME"],i,j; 
 print;

or (you may also use the -v option of awk to assign shell variables to awk variables)

#!/bin/bash
awk -f /dev/fd/3 3<< EOF 
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "$HOME%d%c ",i,j;
 print;

EOF

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325

#!/usr/bin/awk -f
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "%s%d%c ",ENVIRON["HOME"],i,j; 
 print;

#!/bin/bash
awk -f /dev/fd/3 3<< EOF 
BEGIN
 for(i=1;i<5;i++)
 for(j=97;j<100;j++)
 printf "$HOME%d%c ",i,j;
 print;

EOF

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325

answered 3 hours ago

Weijun ZhouWeijun Zhou

1,481325