Caché ObjectScript Reference - InterSystems Documentation

the length of arg1, then arg2 is repeatedly combined with successive substrings of arg1 inleft to right fashion.$ZBOOLEAN always interprets the numeric value as a series of bytes in little-endian order,with the low-order byte first, no matter what the native byte order of your machine is.Internal Structure of $ZBOOLEAN Values$ZBOOLEANThe following table lists the internal rules for $ZBOOLEAN. You do not need to understandthese rules to use $ZBOOLEAN; they are presented here for reference purposes only.There are four possible states of any two bits being compared from within arg1 and arg2. TheBoolean operation generates a true result (=1) if and only if bit_op has the bit mask shownin the table.Bit in arg1Bit in arg2Bit Mask in bit_opDecimalBit Mask in bit_op Binary0081000014010010200101110001EQV and IMP Logical Operators$ZBOOLEAN does not directly support EQV and IMP logical operators. These can be createdby combining simpler logical operations. These logical operators are defined as follows:• EQV is a logical equivalence between two expressions. It is logically identical to ((~arg1)& (~arg2)) ! (arg1 & arg2).• IMP is a logical implication between two expressions. It is logically identical to ~((~arg1)! arg2).See Also• ZZDUMP command• Operators in Using Caché ObjectScriptCaché ObjectScript Reference 521