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Full Discussion: Awk: split and gensub query
Top Forums UNIX for Beginners Questions & Answers Awk: split and gensub query Post 303037760 by mrcool4 on Tuesday 13th of August 2019 04:05:13 AM
Old 08-13-2019
Awk: split and gensub query
Hi All,

Thanks for answering my previous question. Could you please explain the highlighted code?

Code:
awk -v pos='9 27 39 54 59 64 71 78 83 103 108' 'BEGIN{split(pos,var)} {for (i in var) $0=gensub(/./,"|",var[i])} 1' test.txt | head

I understood that the split function splits the pos string into an array but I am confused on the usage of gensub function, especially var[i]. It wold be helpful if there is any tool which I use to visualize the steps.

Thanks,
Mc
Last edited by mrcool4; 08-13-2019 at 05:09 AM.. Reason: Added more info
 

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LEARN ABOUT DEBIAN

snnewgroup

snnewgroup.v0.3.8(8)					      System Manager's Manual					      snnewgroup.v0.3.8(8)

NAME

       snnewgroup - create a new sn newsgroup

SYNOPSIS

       snnewgroup newsgroup [server] [port]

DESCRIPTION

       snnewgroup creates newsgroup assigning it an upstream NNTP server of server:port.  If port is not specified, defaults to 119.  If server is
       also not specified, newsgroup is created as a local group which is fed only by articles POSTed to it.

       You will need to be root or own /var/spool/sn in order to add new groups.

ENVIRONMENT VARIABLES

       SNROOT If this is set and is not empty, the value is used in place of /var/spool/sn, the default news spool directory.

FILES CREATED

       /var/spool/sn/newsgroup
	      Directory where articles will be stored.

       /var/spool/sn/newsgroup/.created
	      Empty file for the newsgroup creation time.

       /var/spool/sn/newsgroup/.serial
	      Where snget gets its idea of the new starting serial number for newsgroup on server server:port.	The value is initialized to 0.

       /var/spool/sn/newsgroup/.outgoing
	      If server is specified, is a symlink to  /var/spool/sn/.outgoing/server:port, which is a directory, created if it does  not  already
	      exist.  If server is not specified, no file /var/spool/sn/newsgroup/.outgoing will be created.  See also snsend.

SEE ALSO

       sndelgroup, snsend

N.B.								    Harold Tay						      snnewgroup.v0.3.8(8)
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