Re: [Help-bash] how to translate one file

[lina]

On Tuesday 03,January,2012 09:17 PM, Greg Wooledge wrote:
> On Mon, Jan 02, 2012 at 11:46:08PM +0800, lina wrote:
> > I have one file like
> >
> > a 1
> > b 2
> > c 3
> >
> > and the last line of the file like :
> >
> > abc
> >
> > I wish to translate it to
> > 1 2 3
> In bash 4, you can do this elegantly using an associative array:
>
> #!/usr/bin/env bash
> declare -A dict
> while read key value; do
>      # If there is no second field, then we've just read the final line.
>      [[ $value ]] || break
>      # Otherwise, enter this pair into our dictionary.
>      dict["$key"]=$value
> done
>
> # Last line has already been read, and is in "key"
> n=${#key}
> for ((i=0; i<n; i++)); do
>      printf "%s " "${dict["${key:i:1}"]}"
> done
> echo
Thanks, very crystal clear.
When I derive it to a field problem,

$ cat dm_1.xpm | while read line ; do IFS=$'\n' ; if [ ${#line} == 30 ]; 
then echo $line ; fi ; done


/* Generated by g_mmdat_g_f */
/* legend:  "Distance (nm)" */
/* x-label: "Residue Index" */
/* y-label: "Residue Index" */
static char *grmacos_xpm[] = {
"D  c #EBEBEB " /* "0.115" */,
"E  c #E5E5E5 " /* "0.154" */,
"F  c #DEDEDE " /* "0.192" */,
"G  c #D8D8D8 " /* "0.231" */,
"H  c #D1D1D1 " /* "0.269" */,
"I  c #CBCBCB " /* "0.308" */,
"J  c #C4C4C4 " /* "0.346" */,
"K  c #BEBEBE " /* "0.385" */,
"L  c #B7B7B7 " /* "0.423" */,
"M  c #B1B1B1 " /* "0.462" */,
"O  c #A3A3A3 " /* "0.538" */,
"P  c #9D9D9D " /* "0.577" */,
"Q  c #969696 " /* "0.615" */,
"R  c #909090 " /* "0.654" */,
"S  c #898989 " /* "0.692" */,
"T  c #838383 " /* "0.731" */,
"U  c #7C7C7C " /* "0.769" */,
"V  c #767676 " /* "0.808" */,
"W  c #6F6F6F " /* "0.846" */,
"X  c #696969 " /* "0.885" */,
"Y  c #626262 " /* "0.923" */,
"Z  c #5C5C5C " /* "0.962" */,

I have problem in dropping the first 5 lines. I wish to start with the 
parts include key and value.

if I use:
$ cat dm_1.xpm | while read line ; do IFS=$'\n' ; if [ ${#line} == 30 -a 
${line:0:1}== '"' ]; then echo $line ; fi ; done
bash: [: too many arguments

Thanks,