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EMPTY()
Checks if the passed argument is empty.
Syntax
EMPTY( <xExp> ) --> lIsEmpty
Arguments
<xExp> is any valid expression.
Returns
A logical value. It is true (.T.) if the passed argument is empty otherwise it is false (.F.).
Description
This function checks if an expression has empty value and returns a logical indicating whether it the expression is empty or not.
Note : Characters with ASCII code 9, 10 and 13 always treated as “white spaces”;
Examples
? EMPTY( "I'm not empty" ) // .F.
Tests
PROCEDURE Test()
? EMPTY( NIL ) // .T.
? EMPTY( 0 ) // .T.
? EMPTY( .F. ) // .T.
? EMPTY( "" ) // .T.
? EMPTY( 1 ) // .F.
? EMPTY( .T. ) // .F.
? EMPTY( "smile" ) // .F.
? EMPTY( Date() ) // .F.
? EMPTY( {} ) // .T.
? EMPTY( {''} ) // .F.
? EMPTY( {=>} ) ) // .T.
? EMPTY( CHR(8) ) // .F.
? EMPTY( CHR(9) ) // .T.
? EMPTY( CHR(10) ) // .T.
RETURN
Compliance
Clipper
Files
Library is rtl
Seealso
LEN()
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