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Homework and Emergencies Homework & Coursework Questions While loop... Post 302554679 by alister on Monday 12th of September 2011 04:08:16 PM
Old 09-12-2011
Thanks for the info, gary_w. I should have qualified my earlier post to make it clear that my statements reflected the POSIX standard. As far as POSIX sh is concerned, double-quoting a command substitution (using either $(...) or `...` syntax), whose result is assigned to a variable, has no effect.

/bin/sh on your solaris box is probably an ancient shell that doesn't support the now ubiquitous (and POSIX-standardized) $(...) command substitution syntax. To your shell, that double-quoted string does not contain a command substitution and so it simply assigns the string as is to the variable. If the OP is using solaris, then he/she may be attempting to use unsupported syntax.

If solaris /bin/sh is POSIX-compliant with regard to a double-quoted backtick command substitution, it should give identical results for var=`cmd` and var="`cmd`".

Regards,
Alister

Last edited by alister; 09-12-2011 at 05:18 PM..
 

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continue(3tcl)						       Tcl Built-In Commands						    continue(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME
continue - Skip to the next iteration of a loop SYNOPSIS
continue _________________________________________________________________ DESCRIPTION
This command is typically invoked inside the body of a looping command such as for or foreach or while. It returns a TCL_CONTINUE code, which causes a continue exception to occur. The exception causes the current script to be aborted out to the innermost containing loop command, which then continues with the next iteration of the loop. Catch exceptions are also handled in a few other situations, such as the catch command and the outermost scripts of procedure bodies. EXAMPLE
Print a line for each of the integers from 0 to 10 except 5: for {set x 0} {$x<10} {incr x} { if {$x == 5} { continue } puts "x is $x" } SEE ALSO
break(3tcl), for(3tcl), foreach(3tcl), return(3tcl), while(3tcl) KEYWORDS
continue, iteration, loop Tcl continue(3tcl)
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