* [9fans] diff side-by-side, an rc challange
@ 2017-03-09 15:56 Steve Simon
2017-03-09 20:02 ` Kurt H Maier
0 siblings, 1 reply; 3+ messages in thread
From: Steve Simon @ 2017-03-09 15:56 UTC (permalink / raw)
To: 9fans
Hi,
I am having to dig through some data files comparing similar results,
I really need a side-by-side compare.
I believe adiff does this for acme, but I am not an acme-ista so I thought
"How hand can it be?".
I wrote the script below, but then I thought "I should be able to do this
without temporary files"
This is where my knowledge of rc(1) fails. How to create two pipes, hold
them open, and use them to shuffle bytes.
anyone care to take up the challange?
-Steve
--------------------------------
#!/bin/rc
tmp1=/tmp/diffsbs-1.$pid
tmp2=/tmp/diffsbs-2.$pid
fn sigint { rm -f $tmp1 $tmp2 }
fn sighup { rm -f $tmp1 $tmp2 }
if(! ~ $#* 2){
echo usage: $0 file1 file2
exit 'usage'
}
diff -b -a $1 $2 | awk -v 'out1='^$tmp1 -v 'out2='^$tmp2 '
{
key = substr($0, 1, 1);
txt = substr($0, 2, length($0)-2);
if(key == " "){
printf("%-32.32s\n", txt) > out1
printf("%-32.32s\n", txt) > out2
}
if(key == "-"){
printf("%-32.32s\n", txt) > out1
printf("%-32.32s\n", "") > out2
}
if(key == "+"){
printf("%-32.32s\n", "") > out1
printf("%-32.32s\n", txt) > out2
}
}'
pr -m -o0 -t -w100 -l0 $tmp1 $tmp2
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] diff side-by-side, an rc challange
2017-03-09 15:56 [9fans] diff side-by-side, an rc challange Steve Simon
@ 2017-03-09 20:02 ` Kurt H Maier
2017-03-09 21:48 ` Steve Simon
0 siblings, 1 reply; 3+ messages in thread
From: Kurt H Maier @ 2017-03-09 20:02 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
On Thu, Mar 09, 2017 at 03:56:34PM +0000, Steve Simon wrote:
> Hi,
>
> I am having to dig through some data files comparing similar results,
> I really need a side-by-side compare.
Does comm(1) not work for this case?
khm
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] diff side-by-side, an rc challange
2017-03-09 20:02 ` Kurt H Maier
@ 2017-03-09 21:48 ` Steve Simon
0 siblings, 0 replies; 3+ messages in thread
From: Steve Simon @ 2017-03-09 21:48 UTC (permalink / raw)
To: 9fans
Good grief,
I never do stop learning
I knew the name but I had never really understood what comm does.
Perfect.
Thanks Kurt.
-Steve
^ permalink raw reply [flat|nested] 3+ messages in thread
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