IBM SC34-5764-01 Manual do Utilizador descarregar pdf (Página 210)

100

101

LASTPOS (Last Position)

 LASTPOS(needle,haystack

,start

) 

returns the position of the last occurrence of one string, needle, in another, haystack. (See also the POS

function.) Returns 0 if needle is the null string or is not found. By default the search starts at the last

character of haystack and scans backward. You can override this by specifying start, the point at which the

backward scan starts. start must be a positive whole number and defaults to LENGTH(haystack) if larger

than that value or omitted.

Here are some examples:

LASTPOS(' ','abc def ghi') -> 8

LASTPOS(' ','abcdefghi') -> 0

LASTPOS('xy','efgxyz') -> 4

LASTPOS(' ','abc def ghi',7) -> 4

LEFT

 LEFT(string,length

,pad

) 

returns a string of length length, containing the leftmost length characters of string. The string returned is

padded with pad characters (or truncated) on the right as needed. The default pad character is a blank.

length must be a positive whole number or zero. The LEFT function is exactly equivalent to:

 SUBSTR(string,1,length

,pad

) 

Here are some examples:

LEFT('abc d',8) -> 'abc d '

LEFT('abc d',8,'.') -> 'abc d...'

LEFT('abc def',7) -> 'abc de'

LENGTH

 LENGTH(string) 

returns the length of string.

Here are some examples:

LENGTH('abcdefgh') -> 8

LENGTH('abc defg') -> 8

LENGTH('') -> 0

LINESIZE

 LINESIZE() 

returns the current terminal line width (the point at which the language processor breaks lines displayed

using the SAY instruction). Returns a default value of 80 if:

v No terminal is attached.

v Output is being redirected.

Note: To determine if a terminal is attached, specify the REXX/CICS command SCRNINFO. The values

for screen height and screen width are 0 if there is no terminal attached.

MAX (Maximum)

Functions

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CICS TS for VSE/ESA: REXX Guide

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