Joy Online Manual
NAME |
objc:isNullObj - Check for null object pointer |
SYNOPSIS |
objc:isNullObj object
DESCRIPTION |
Returns 1 if the given object is a NULL pointer to a Tcl_Obj, 0 otherwise. You can get the null object itself by writing [ItkObjCNullObj]. |
EXAMPLE |
tcl> objc:isNullObj [ItkObjCNullObj]
1
KEYWORDS |
NULL, pointer, TclObj |
Index |