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Full Discussion: ksh String Manipulation - removing variables from within a variable
Top Forums Shell Programming and Scripting ksh String Manipulation - removing variables from within a variable Post 303029761 by apmcd47 on Thursday 31st of January 2019 06:11:21 PM
Old 01-31-2019
@bakunin: I can't get no ... oh!


Parameter expansion gets to combine array expansion with the substitution expansions in both bash and ksh93:
Code:
$ namea=( John Paul George Ringo )
$ exclude=Ringo
$ echo ${namea[@]//$exclude/}
John Paul George

but notice this difference between the two shells:
bash:
Code:
$ nameb=( ${namea[@]//$exclude/} )
$ echo ${#nameb[@]}
3

ksh93:
Code:
$ nameb=( ${namea[@]//$exclude/} )
$ echo ${#nameb[@]}
4

so in bash you could use this method to delete an item from an array but in ksh93 it will simply empty the item.


Andrew
 

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LEARN ABOUT X11R4

times

times(1)							   User Commands							  times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
	   able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
	   performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10							    15 Apr 1994 							  times(1)
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