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man pages section 1: User Commands

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Updated: Thursday, June 13, 2019
 
 

lrange (1t)

Name

lrange - Return one or more adjacent elements from a list

Synopsis

lrange list first last

Description

lrange(1t)                   Tcl Built-In Commands                  lrange(1t)



______________________________________________________________________________

NAME
       lrange - Return one or more adjacent elements from a list

SYNOPSIS
       lrange list first last
______________________________________________________________________________

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}


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | runtime/tcl-8    |
       +---------------+------------------+
       |Stability      | Uncommitted      |
       +---------------+------------------+
SEE ALSO
       list(n),  lappend(n),  lindex(n),  linsert(n),  llength(n), lsearch(n),
       lset(n), lreplace(n), lsort(n), string(n)

KEYWORDS
       element, list, range, sublist



NOTES
       This    software    was    built    from    source     available     at
       https://github.com/oracle/solaris-userland.    The  original  community
       source was downloaded from  http://prdownloads.sourceforge.net/tcl/tcl-
       core8.6.7-src.tar.gz

       Further information about this software can be found on the open source
       community website at https://www.tcl.tk/.



Tcl                                   7.4                           lrange(1t)