lrange(3tcl)

NAME

   lrange - Return one or more adjacent elements from a list

SYNOPSIS

   lrange list first last
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DESCRIPTION

   List  must  be  a  valid Tcl list.  This command will return a new list
   consisting of elements first through last, inclusive.  The index values 
   first and last are interpreted the same as index values for the command 
   string index, supporting simple index arithmetic and  indices  relative 
   to  the  end of the list.  If first is less than zero, it is treated as
   if it were zero.  If last is greater than or equal  to  the  number  of
   elements  in  the list, then it is treated as if it were end.  If first
   is greater than last then an empty string is returned.   Note:  "lrange
   list  first  first"  does not always produce the same result as "lindex
   list first" (although it often does for  simple  fields  that  are  not
   enclosed in braces); it does, however, produce exactly the same results
   as "list [lindex list first]"

EXAMPLES

   Selecting the first two elements:
          % lrange {a b c d e} 0 1
          a b

   Selecting the last three elements:
          % lrange {a b c d e} end-2 end
          c d e

   Selecting everything except the first and last element:
          % lrange {a b c d e} 1 end-1
          b c d

   Selecting a single element with lrange is not the same as doing so with
   lindex:
          % set var {some {elements to} select}
          some {elements to} select
          % lindex $var 1
          elements to
          % lrange $var 1 1
          {elements to}

SEE ALSO

   list(3tcl),  lappend(3tcl), lindex(3tcl), linsert(3tcl), llength(3tcl),
   lsearch(3tcl), lset(3tcl), lreplace(3tcl), lsort(3tcl), string(3tcl)    

KEYWORDS

   element, list, range, sublist

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