Tech-Recipes - Latest Comments in bash shell script iterate through array values

Re: bash shell script iterate through array values

Reginald Pierce — Wed, 27 Jul 2011 22:30:49 -0000

I have found Notepad++ to be a great tool for Windows since it allows you to convert the line endings to Windows, Mac, or Linux while editing the file. It also has good code highlighting.

Re: bash shell script iterate through array values

Jack — Fri, 18 Feb 2011 19:17:08 -0000

Iterate through a sparse array by using:

ARR=([0]="zero" [1]="one" [10]="ten")
for INDEX in ${!ARR[@]}
do
echo index $INDEX "=>" ${ARR[$INDEX]}
done

Re: bash shell script iterate through array values

minoc — Thu, 17 Feb 2011 16:08:59 -0000

Oops., The easiest way to iterate is like you said initially., except you forgot the quotes:

for name in "${names[@]}"; do

works., and preserves the internal spaces in the elements...

Re: bash shell script iterate through array values

minoc — Thu, 17 Feb 2011 16:02:52 -0000

as long as names are not separated by IFS (defaulting to white space).. for example

names=( "foo bar" "ben smith" )
for name in ${names[@]}; do echo "[${name}]"; done
[foo]
[bar]
[ben]
[smith]

whereas this preserves the spacing in array elements:

for ((i=0; i<${#names[@]}; i++)); do echo "[${names[${i}]}]"; done
[foo bar]
[ben smith]

I am not yet sure how to iterate thru a sparse array yet...

Re: bash shell script iterate through array values

sriram — Tue, 08 Feb 2011 08:36:10 -0000

it works perfectly

Thanks a lot

Re: bash shell script iterate through array values

annie — Sat, 06 Nov 2010 15:25:26 -0000

great!...
i really need this
thanks

Re: bash shell script iterate through array values

Thanish — Tue, 25 May 2010 13:43:40 -0000

Thanks for the for function m8, you just saved me some hours.
Now I can get back to my Script. You guys can also place the 'do' on the first line
IMHO it looks better this way.

for name in ${names[@]}; do

Re: bash shell script iterate through array values

TuxSax — Sun, 09 May 2010 02:36:18 -0000

Right, I've forgot to mention that option too
If you are working on Ubuntu, like me, then the package "tofrodos" contains the dos2unix utility.

Re: bash shell script iterate through array values

JassTheFabulous — Mon, 11 Jan 2010 02:01:23 -0000

Thanks a lot..

Re: bash shell script iterate through array values

TuxSax — Thu, 01 Oct 2009 04:19:01 -0000

I had a similar problem until I realized that the file I was working on was created on Windows too.
I fixed it with:
sed -i 's/\r$//' <file>

Re: bash shell script iterate through array values

kool — Wed, 06 May 2009 02:53:04 -0000

thnx a lot pal
I owe u 5 marks of my final exam
:)

Re: bash shell script iterate through array values

Olly — Wed, 25 Feb 2009 08:38:28 -0000

Thank you very much for this snipped - just what I was looking for!

Re: bash shell script iterate through array values

mati — Tue, 24 Feb 2009 19:02:43 -0000

if you really have to use windows, then cygwin is your salvation.

Re: bash shell script iterate through array values

JamesDS — Wed, 11 Feb 2009 12:32:08 -0000

ah, just what I was looking for - perfect, thanks!

Re: bash shell script iterate through array values

RobbyC — Thu, 05 Feb 2009 12:03:00 -0000

The reason for this error is that the control character sequence used by DOS (Windows, \r\n) is different from the sequnce used by UNIX (*NIX, \n)

Re: bash shell script iterate through array values

Fakeer — Tue, 25 Nov 2008 13:48:30 -0000

all kinds of errors will popup if you write this (or any) script on windows. i was almost giving up when i realised i had written it on notepad and saved on the linux box over samba. use dostounix <scriptfile> to fix the format.