Array size in C shell scripting Post: 303044458

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LEARN ABOUT CENTOS

unset

unset(n)						       Tcl Built-In Commands							  unset(n)

__________________________________________________________________________________________________________________________________________________

NAME

       unset - Delete variables

SYNOPSIS

       unset ?-nocomplain? ?--? ?name name name ...?
_________________________________________________________________

DESCRIPTION

       This  command removes one or more variables.  Each name is a variable name, specified in any of the ways acceptable to the set command.	If
       a name refers to an element of an array then that element is removed without affecting the rest of the array.  If a  name  consists  of	an
       array name with no parenthesized index, then the entire array is deleted.  The unset command returns an empty string as result.	If -nocom-
       plain is specified as the first argument, any possible errors are suppressed.  The option may not be abbreviated, in order to  disambiguate
       it  from possible variable names.  The option -- indicates the end of the options, and should be used if you wish to remove a variable with
       the same name as any of the options.  If an error occurs, any variables after the named one causing the error are not  deleted.	 An  error
       can  occur  when the named variable does not exist, or the name refers to an array element but the variable is a scalar, or the name refers
       to a variable in a non-existent namespace.

EXAMPLE

       Create an array containing a mapping from some numbers to their squares and remove the array elements for non-prime numbers:
	      array set squares {
		  1 1	 6 36
		  2 4	 7 49
		  3 9	 8 64
		  4 16	 9 81
		  5 25	10 100
	      }

	      puts "The squares are:"
	      parray squares

	      unset squares(1) squares(4) squares(6)
	      unset squares(8) squares(9) squares(10)

	      puts "The prime squares are:"
	      parray squares

SEE ALSO

       set(n), trace(n), upvar(n)

KEYWORDS

       remove, variable

Tcl									8.4								  unset(n)

10 More Discussions You Might Find Interesting

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