Putting grep results into Array??

[itpmguy]

This is a Korn shell question. I want to put the results of a grep into an array. So, I did the following:

set -A newarray `grep XYXYXY testfile.txt`

But this puts each word into an array index instead putting each line into an array index. For ex. if the grep matches the following lines:

My name is XYXYXY
Your name is XYXYXY

then the array output is:

My
name
is
XYXYXY
Your
name
is
XYXYXY

I want the array to take the entire lines such that

newarray[0] = My name is XYXYXY
newarray[1] = Your name is XYXYXY

How can this be done?? Do I have to loop through each line in the file to put lines into the array??

Thanks


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[LKBrwnDBA]

You need to assign the lines in a "loop":

#!/bin/ksh
i=0
while read lin
do
  x[$i]="$lin"
  ((i+=1))
done <testfile.txt

----------------------------------------------------------------------------
The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

 

[LKBrwnDBA]

Using "grep":

#!/bin/ksh
i=0
grep XYXYXY testfile.txt |\
while read lin
do
  x[$i]="$lin"
  ((i+=1))
done

----------------------------------------------------------------------------
The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

 

[PHV]

If you're absolutely sure you have to deal with an array:
i=0
grep XYXYXY testfile.txt | while read x
do newarray[$i]="$x"; ((i+=1))
done

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[Ogzilal]

Hi,

If you dont'care about spaces to be replaced by tab characters, this command will do the job :

set -A newarray $(grep XYXYXY testfile.txt |sed -e 's/  */\\t/g')
$echo ${newarray[0]}
My      name    is      XYXYXY
$echo ${newarray[1]}
Your    name    is      XYXYXY

Ali

 

[columb]

Or you could change IFS
For example

#!/bin/ksh

IFS='
'
set -A array $(grep XYXY testfile)

Ceci n'est pas une signature
Columb Healy

 

[itpmguy]

Thanks. This worked. This will be used multiple times so I am trying to create a function to populate array and I am getting the following error:

populatearray[9]: newarray[174]=XXXX YYYYY X
-4.000000: not found

populatearray[9]: newarray[175]=ZZZZ XXYYY A -17.000000: not found

.. so on until the end of the grep results. Here's the populatearray function code:

the error is on the line ->> newarray[$i]="$lin". As mentioned before, this works as stand alone code and errs out only when used inside a function.

populatearray () {

arraynm=$1
file=$2

i=0
grep XYXYXY $file |\
while read lin
do
${arraynm}[$i]="$lin"
((i+=1))
done

}
I am calling the function as:

populate_array newarray filename

Any suggestions are greatly appreciated.

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[PHV]

Have a look at the eval function:
eval ${arraynm}'[$i]'="\$lin"

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[itpmguy]

Thanks! That was super!

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