lindex man page on HP-UX

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

______________________________________________________________________________

NAME
       lindex - Retrieve an element from a list

SYNOPSIS
       lindex list ?index...?
_________________________________________________________________

DESCRIPTION
       The  lindex command accepts a parameter, list, which it treats as a Tcl
       list. It also accepts zero or more indices into the list.  The  indices
       may  be	presented either consecutively on the command line, or grouped
       in a Tcl list and presented as a single argument.

       If no indices are presented, the command takes the form:
	      lindex list
       or
	      lindex list {}
       In this case, the return value of lindex is simply  the	value  of  the
       list parameter.

       When presented with a single index, the lindex command treats list as a
       Tcl list and returns the index'th element from  it  (0  refers  to  the
       first element of the list).  In extracting the element, lindex observes
       the same rules concerning braces and quotes and backslashes as the  Tcl
       command interpreter; however, variable substitution and command substi‐
       tution do not occur.  If index is negative or greater than or equal  to
       the number of elements in value, then an empty string is returned.  The │
       interpretation of each simple index value is the same as for  the  com‐ │
       mand string index, supporting simple index arithmetic and indices rela‐ │
       tive to the end of the list.

       If additional index arguments are supplied, then each argument is  used
       in  turn	 to  select  an	 element from the previous indexing operation,
       allowing the script to select elements from sublists.  The command,
	      lindex $a 1 2 3
       or
	      lindex $a {1 2 3}
       is synonymous with
	      lindex [lindex [lindex $a 1] 2] 3

EXAMPLES
	      lindex {a b c}
		    → a b c
	      lindex {a b c} {}
		    → a b c
	      lindex {a b c} 0
		    → a
	      lindex {a b c} 2
		    → c
	      lindex {a b c} end
		    → c
	      lindex {a b c} end-1
		    → b
	      lindex {{a b c} {d e f} {g h i}} 2 1
		    → h
	      lindex {{a b c} {d e f} {g h i}} {2 1}
		    → h
	      lindex {{{a b} {c d}} {{e f} {g h}}} 1 1 0
		    → g
	      lindex {{{a b} {c d}} {{e f} {g h}}} {1 1 0}
		    → g

SEE ALSO
       list(n),	 lappend(n),  linsert(n),  llength(n),	lsearch(n),   lset(n),
       lsort(n), lrange(n), lreplace(n), string(n)KEYWORDS
       element, index, list

Tcl				      8.4			     lindex(n)
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