csh, perl, python??

baidym · 10-30-2007, 04:38 AM

Hi,

New to scripting so please take pitty on me.

I'm trying to create a script that will output a string of comma separated numbers to the command line when given the first and last number. e.g.
% <scriptname> 12345 12350
% 12345,12346,12347,12348,12349,12350

I've been trying to do it with bash and perl but to no avail. Can anyone help?

Cheers

Michelle.

radoulov · 10-30-2007, 04:54 AM

bash:

Code:

$ (IFS=,;set -- {12345..12350};printf "%s\n" "$*")
12345,12346,12347,12348,12349,12350

Edit: you need zsh (or bashdiff, IIRC) if you want to
use parameters inside the braces:

Code:

zsh-4.3.4% start=12345
zsh-4.3.4% end=12350
zsh-4.3.4% IFS=,;set -- {$start..$end};printf "%s\n" "$*"
12345,12346,12347,12348,12349,12350

chrism01 · 10-30-2007, 05:15 AM

Code:

for num in `seq $1 $2`
do
    echo $num
done

arub · 10-30-2007, 06:27 AM

here simple script in python

print_num.py
-------------------------------------------------
#!/usr/bin/python
import sys
print range(int(sys.argv[1]),int(sys.argv[2])+1)
---------------------------------------------------

Result

$python print_num.py 3 11
[3, 4, 5, 6, 7, 8, 9, 10, 11]

makyo · 10-30-2007, 08:50 AM

Hi.

Some version of seq can do it directly:

Code:

#!/usr/bin/env sh

# @(#) s1       Demonstrate sequence of comma-separated integers with seq.

set -o nounset
echo

debug=":"
debug="echo"

## Use local command version for the commands in this demonstration.

echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version bash seq

echo

seq -s, 12345 12350

exit 0

producing:

Code:

% ./s1

(Versions displayed with local utility "version")
GNU bash 2.05b.0
seq (coreutils) 5.2.1

12345,12346,12347,12348,12349,1235

cheers, makyo

ghostdog74 · 10-30-2007, 09:03 AM

in bash

Code:

# echo {12345..12350}
12345 12346 12347 12348 12349 12350

makyo · 10-30-2007, 09:15 AM

Hi.

Quote:

Originally Posted by radoulov

...
Edit: you need zsh (or bashdiff, IIRC) if you want to
use parameters inside the braces:
...

I like the shell solution. Adding a spin with eval makes it work with bash3:

Code:

#!/usr/bin/env bash3

# @(#) s2       Demonstrate feature.

set -o nounset
echo

debug=":"
debug="echo"

## Use local command version for the commands in this demonstration.

echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version bash3

echo

echo " bash3 with constants:"
(IFS=,;set -- {12345..12350};printf "%s\n" "$*")

# Original
# start=12345
# end=12350
# IFS=,;set -- {$start..$end};printf "%s\n" "$*"

start=12345
end=12350
echo
echo " bash3 with variables:"
IFS=,;set -- {$start..$end};printf "%s\n" "$*"

echo
echo " bash3 variables with eval:"
IFS=,;eval set -- {$start..$end};printf "%s\n" "$*"

exit 0

Producing:

Code:

% ./s2

(Versions displayed with local utility "version")
GNU bash 3.00.16(1)-release

 bash3 with constants:
12345,12346,12347,12348,12349,12350

 bash3 with variables:
{12345..12350}

 bash3 variables with eval:
12345,12346,12347,12348,12349,12350

cheers, makyo

makyo · 10-30-2007, 09:18 AM

Hi.

Quote:

Originally Posted by ghostdog74

in bash

Code:

# echo {12345..12350}
12345 12346 12347 12348 12349 12350

The OP wanted "comma separated" (OTOH, the title says csh, yet he specifically mentioned bash) ... cheers, makyo

ghostdog74 · 10-30-2007, 09:42 AM

Quote:

Originally Posted by makyo

Hi.

The OP wanted "comma separated" (OTOH, the title says csh, yet he specifically mentioned bash) ... cheers, makyo

yes i know. that's just trivial output formatting. just showing how it can be done in bash. btw, so is post #3.

bigearsbilly · 10-30-2007, 11:54 AM

http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/

paddy3118 · 10-30-2007, 01:29 PM

A little Python throwaway script.
Pythoins range does not include the upper bound so I add one, and I use backticks to change ints to strings:

Code:

bash$ python -c 'print ",".join(`i` for i in range(12345,12351))'
12345,12346,12347,12348,12349,12350
bash$

rsashok · 10-30-2007, 01:54 PM

#!/bin/bash
echo {12345..12350} | tr ' ' ','

angrybanana · 10-30-2007, 02:16 PM

Since python is already taken, and no one did perl yet.

Code:

$ perl -le 'print join ",", 12345..12350'
12345,12346,12347,12348,12349,12350

paddy3118 · 10-31-2007, 12:35 AM

...And here is a solution in awk:

Code:

bash$ awk 'BEGIN{OFS=",";n=1;for(i=12345;i<=12350;i++){$n=i;n++}print $0;exit}'
12345,12346,12347,12348,12349,12350
bash$

I set the output field separator to a comma then stuff $1...$N with the appropriate values and rely on awk concatenating things to create $0 for printing.

ghostdog74 · 10-31-2007, 12:54 AM

Quote:

Originally Posted by paddy3118

...And here is a solution in awk:

Code:

bash$ awk 'BEGIN{OFS=",";n=1;for(i=12345;i<=12350;i++){$n=i;n++}print $0;exit}'
12345,12346,12347,12348,12349,12350
bash$

I set the output field separator to a comma then stuff $1...$N with the appropriate values and rely on awk concatenating things to create $0 for printing.

another way, except there's extra "," at the end.

Code:

awk 'BEGIN{s=12345;n=12350}
     s<n{ printf s++"," }' "file"