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Top Forums Shell Programming and Scripting ksh String Manipulation - removing variables from within a variable Post 303029822 by apmcd47 on Friday 1st of February 2019 08:42:47 AM
Old 02-01-2019
Quote:
Originally Posted by bakunin
@apmcd74:
Please notice that when you define a variable with:

Code:
cname=( word1 word2 word3 [...] )

you create an array, not a string. The parameter expansion ${cname/searchword/replacement} deals with strings though. i.e.

Code:
variable="++old++"
echo ${variable/old/NEW}
++NEW++

bakunin
My point was that you can do string manipulation per element, or for all elements in an array of strings, thus:
Code:
$ array=( john paul george ringo )
$ echo ${array[0]/h/}
jon
$ for btl in ${array[@]^}
> do
>   echo $btl
> done
John
Paul
George
Ringo
$

As I said, this works for bash and ksh93 on my Ubuntu systems; I haven't tried it out on ksh88.

Andrew
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pydhcplib.strlist(3)						     PYDHCPLIB						      pydhcplib.strlist(3)

NAME
pydhcplib.strlist - Internal type of pydhcplib for lists of bytes processing. SYNOPSIS
from pydhcplib.type_hw_addr import hwmac a = strlist() a = strlist([100,100,10,42,44,26]) DESCRIPTION
The class pydhcplib.strlist is an specific type of pydhcplib. It exist in order to simplify processing of raw data from network. When a dhcp packet dhcp is received, it's a succession of approximately 300 bytes. Within pydhcplib these data are transformed in an intermediary form of type "strlist" in order to facilitate their handling. This intermediary form will eventually be suppressed in the stable versions of pydhcplib to speedup the processing time, but backward compatibility will be assured. The pydhcplib.strlist class creation argument can be a list of numbers whose value goes from 0?55. The pydhcplib.strlist class creation argument can be a string of ASCII character. METHODS
The implemented methods in this type are mostly comparison methods (= =, >, etc...) else : str() convert the address into a printable string type. list() convert the address into a list of bytes. EXAMPLES
Example program strlist_example.py : from pydhcplib.type_strlist import strlist word = strlist() word1 = strlist("azerty") word2 = strlist("qwerty") word3 = strlist([97, 122, 101, 114, 116, 121]) print "a0 : ",word print "a1 : ",word1 print "a2 : ",word2 print "a3 : ",word3 if word1 == word2 : print "test 1 : ",word1, "==",word2 else : print "test 1 : " ,word1, "!=",word2 if word1 == word3 : print "test 2 : ", word1, "==",word3 else : print "test 2 : ", word1, "!=",word3 SEE ALSO
pydhcp(8), pydhcplib.hwmac(3), pydhcplib.ipv4(3), pydhcplib.strlist(3), pydhcplib.DhcpPacket(3), pydhcplib.DhcpBasicPacket(3), pydhc- plib.DhcpNetwork(3), pydhcplib.DhcpClient(3), pydhcplib.DhcpRawClient(3), pydhcplib.DhcpDerver(3) BUGS
See http://pydhcplib.tuxfamily.org/ for more information. AUTHOR
Mathieu Ignacio (mignacio[AT]april.org) pydhcplib.strlist(3)
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