On Tue, Jul 12, 2011 at 4:09 PM, Rony G. Flatscher <rony.flatsc...@wu-wien.ac.at> wrote: > > On 12.07.2011 22:05, Rick McGuire wrote: >> On Tue, Jul 12, 2011 at 3:56 PM, Rony G. Flatscher >> <rony.flatsc...@wu-wien.ac.at> wrote: >> >>> While debugging a library, I stumbled about the following behaviour: after >>> replacing >>> >>> context->IsTypeOf(obj,"STRING") >>> >>> with >>> >>> context->IsString(obj) >>> >>> the resulting library would not behave the same. Undoing the change makes it >>> work again. >>> >>> Not being sure what the cause really is, I just would like to be sure that >>> invoking IsString(obj) with the same object as IsOfType(obj,"STRING") should >>> in both cases return identical results. Or is there some difference in howe >>> these two APIs carry out their functionality, such that it is possible that >>> they might return different results supplying the same object? >>> >> IsString() will only return true if the object is exactly an instance >> of string. Â IsOfType() will return for other objects that are not >> necessarily strings, such as subclasses or even the hidden Integer and >> NumberString instances. >> > Ahh, that explains this, thank you very much! > > (The error occurs when the object is an integer, so the test in this > case will yield different results. Will use IsOfType() instead of > IsString() in these un/marshalling cases.)
IsString() is intended for tests to determine if an object can be used for any the String APIs, not for general IsA tests. Note the using IsOfType() to test for a String value does not guarantee the object can be used with the String APIs. Rick > > ---rony > > > ------------------------------------------------------------------------------ > AppSumo Presents a FREE Video for the SourceForge Community by Eric > Ries, the creator of the Lean Startup Methodology on "Lean Startup > Secrets Revealed." This video shows you how to validate your ideas, > optimize your ideas and identify your business strategy. > http://p.sf.net/sfu/appsumosfdev2dev > _______________________________________________ > Oorexx-devel mailing list > Oorexx-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/oorexx-devel > ------------------------------------------------------------------------------ AppSumo Presents a FREE Video for the SourceForge Community by Eric Ries, the creator of the Lean Startup Methodology on "Lean Startup Secrets Revealed." This video shows you how to validate your ideas, optimize your ideas and identify your business strategy. http://p.sf.net/sfu/appsumosfdev2dev _______________________________________________ Oorexx-devel mailing list Oorexx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oorexx-devel
