HPlogo QUERY/iX Reference Manual > Chapter 4 QUERY/iX COMMANDS (cont)

LISTREDO

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E0300 Edition 7 ♥
E1098 Edition 6

Displays one or more commands in the command history buffer.

Syntax


  LISTR[EDO] [m] [,n] [;{ABS | REL | UNN}]

Parameters

m,n

displays a range of commands in the command history buffer. m is the starting number (least recent) and n is the ending number (most recent). If m is equal to n, only the specified command is displayed. m and n can either be absolute (positive) numbers or relative (negative) numbers; however, both must be either relative or absolute. The use of these parameters is discussed further in the table below.

START END RESULT
(omitted)(omitted) All commands in history buffer are displayed.
m,n Command m through command n are displayed.
m(omitted) Command m through the last command are displayed.
(omitted),n The first command through command n are displayed.

ABS

displays the absolute command numbers. ABS is the default. Absolute numbers are positive numbers beginning with the first (least recent) command in the command history buffer. For example, 1 is the first command in the command history buffer.

REL

displays the relative command numbers. Relative numbers are negative numbers beginning with the last (most recent) command in the command history buffer. For example, -1 is the last command in the command history buffer.

UNN

suppresses command numbering.

Discussion

The LISTREDO commands displays the commands from least recent to most recent. Up to 20 commands can be displayed. The LISTREDO command is added to the command history buffer.

Example

In this example, the first LISTREDO command is issued when the command history buffer contains two commands. However, when the buffer is displayed, three commands are listed since the LISTREDO command is added to the buffer. The next LISTREDO command lists all the commands in the commands history buffer with relative numbers. Finally, the third LISTREDO command lists the third most recent command through the most recent command with relative numbers. 

  >LISTREDO
        1) DEFINE
        2) FIND FINDX
        3) LISTREDO
  >LISTREDO ;REL
       -4) DEFINE
       -3) FIND FINDX
       -2) LISTREDO
       -1) LISTREDO ;REL
  >LISTREDO -3 ;REL
       -3) LISTREDO
       -2) LISTREDO ;REL
       -1) LISTREDO -3 ;REL
  >



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