LSET - QB64Official/qb64 GitHub Wiki

LSET left-justifies a fixed length string expression based on the size of the STRING variable and string expression.

Syntax

LSET {stringVariable = stringExpression | stringExpression1 = stringExpression2}

Description

If the string expression is longer than a fixed length string variable the value is truncated from the right side in LSET or RSET.
If the LSET string expression is smaller, spaces will occupy the extra positions to the right in the string.
LSET can be used with a FIELD or TYPE definition to set the buffer position before a PUT.

Example(s)

Using LSET with a FIELD definition. Note: May create an empty (unchanged) file that can be deleted.


OPEN "testfile.dat" FOR RANDOM AS #1 LEN = 15
FIELD 1, 6 AS a$, 9 AS other$
FIELD 1, 2 AS b$, 13 AS another$
LSET a$ = "1234567890"
LSET other$ = "1234567890"
PRINT a$, b$, other$, another$
CLOSE #1


123456            12         123456789     3456123456789

How LSET can define two different string length values in one statement.


TYPE ninestring
head AS STRING * 9
END TYPE

TYPE fivestring
head AS STRING * 5
END TYPE

DIM me AS ninestring, you AS fivestring
me.head = "ACHES NOT"
CLS

LSET you.head = me.head
PRINT "me.head: "; me.head
PRINT "you.head: "; you.head


me.head: ACHES NOT
you.head: ACHES