Re: Object type
"Jeremy Tregunna [email protected] [iolanguage]" <[email protected]> Wed, 31 Jan 2018 14:29:28 -0600
| Newsgroups | gmane.comp.lang.io |
|---|---|
| Message-ID | <[email protected]> |
--5a722728_46fb60c4_1e6f Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Just for completeness, it used to be -100 to +250 but that may have changed= in recent years. On Jan 31 2018, at 11:12 am, Steve Dekorte [email protected] [iolanguage] <= [email protected]> wrote: > > > > > > On Jan 31, 2018, at 8:29 AM, Lucas Buchala [email protected] [iola= nguage] <[email protected]> wrote: > > > > Consider this source example: > > > > Foo :=3D 100 > > Bar :=3D "abc" > > > > 100 type println > > "abc" type println > > > > Running it outputs: > > > > Foo > > Bar > > > > Is this really intended/expected? > > Lucas, > It=E2=80=99s a bit weird, but expected. > 1. As a convenience for creating prototypes/classes, assigning to an uppe= rcase name adds a type slot with that name to the right hand result. > 2. For efficiency, all immutable strings and (IIRC) numbers within a cert= ain range (maybe -100 to 100?) are singletons in Io=E2=80=99s implementatio= n. > So when you do: > Foo :=3D 100 > It creates a type slot on the 100 singleton and sets it=E2=80=99s value t= o =E2=80=9CFoo=E2=80=9D. > Likewise for the immutable string =E2=80=9Cabc=E2=80=9D in your example. > > Hope this helps, > Steve > >=20 --5a722728_46fb60c4_1e6f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/htm= l4/strict.dtd"> <html> <head> </head> =20 <body style=3D"background-color: #fff;"> <span style=3D"display:none"> </span> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id=3D"ygrp-mlmsg" style=3D"position:relative;"> <div id=3D"ygrp-msg" style=3D"z-index: 1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id=3D"ygrp-text" > =20=20=20=20=20=20 =20=20=20=20=20=20 <p><div>Just for completeness, it used to be -100 to +250 but tha= t may have changed in recent years.</div><br><div class=3D"gmail_quote_attr= ibution">On Jan 31 2018, at 11:12 am, Steve Dekorte [email protected] [iola= nguage] <[email protected]> wrote:</div><blockquote><br><div= ><br><div><div><div><div><br><br><div><font style=3D"font-size:13px;"><font= style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font style=3D"= font-family:Georgia;">> On Jan 31, 2018, at 8:29 AM, Lucas Buchala lucas= [email protected] [iolanguage] <[email protected]> wrote:</f= ont></font></font></div><div><font style=3D"font-size:13px;"><font style=3D= "font-family:Arial, helvetica, clean, sans-serif;"><font style=3D"font-fami= ly:Georgia;">></font></font></font></div><div><font style=3D"font-size:1= 3px;"><font style=3D"font-family:Arial, helvetica, clean, sans-serif;"><fon= t style=3D"font-family:Georgia;">> Consider this source example:</font><= /font></font></div><div><font style=3D"font-size:13px;"><font style=3D"font= -family:Arial, helvetica, clean, sans-serif;"><font style=3D"font-family:Ge= orgia;">></font></font></font></div><div><font style=3D"font-size:13px;"= ><font style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font sty= le=3D"font-family:Georgia;">> Foo :=3D 100</font></font></font></div><di= v><font style=3D"font-size:13px;"><font style=3D"font-family:Arial, helveti= ca, clean, sans-serif;"><font style=3D"font-family:Georgia;">> Bar :=3D = "abc"</font></font></font></div><div><font style=3D"font-size:13px;"><font = style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font style=3D"f= ont-family:Georgia;">></font></font></font></div><div><font style=3D"fon= t-size:13px;"><font style=3D"font-family:Arial, helvetica, clean, sans-seri= f;"><font style=3D"font-family:Georgia;">> 100 type println</font></font= ></font></div><div><font style=3D"font-size:13px;"><font style=3D"font-fami= ly:Arial, helvetica, clean, sans-serif;"><font style=3D"font-family:Georgia= ;">> "abc" type println</font></font></font></div><div><font style=3D"fo= nt-size:13px;"><font style=3D"font-family:Arial, helvetica, clean, sans-ser= if;"><font style=3D"font-family:Georgia;">></font></font></font></div><d= iv><font style=3D"font-size:13px;"><font style=3D"font-family:Arial, helvet= ica, clean, sans-serif;"><font style=3D"font-family:Georgia;">> Running = it outputs:</font></font></font></div><div><font style=3D"font-size:13px;">= <font style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font styl= e=3D"font-family:Georgia;">></font></font></font></div><div><font style= =3D"font-size:13px;"><font style=3D"font-family:Arial, helvetica, clean, sa= ns-serif;"><font style=3D"font-family:Georgia;">> Foo</font></font></fon= t></div><div><font style=3D"font-size:13px;"><font style=3D"font-family:Ari= al, helvetica, clean, sans-serif;"><font style=3D"font-family:Georgia;">>= ; Bar</font></font></font></div><div><font style=3D"font-size:13px;"><font = style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font style=3D"f= ont-family:Georgia;">></font></font></font></div><div><font style=3D"fon= t-size:13px;"><font style=3D"font-family:Arial, helvetica, clean, sans-seri= f;"><font style=3D"font-family:Georgia;">> Is this really intended/expec= ted?</font></font></font></div><br><div><font style=3D"font-size:13px;"><fo= nt style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font style= =3D"font-family:Georgia;">Lucas,</font></font></font></div><br><div><font s= tyle=3D"font-size:13px;"><font style=3D"font-family:Arial, helvetica, clean= , sans-serif;"><font style=3D"font-family:Georgia;">It=E2=80=99s a bit weir= d, but expected.</font></font></font></div><br><div><font style=3D"font-siz= e:13px;"><font style=3D"font-family:Arial, helvetica, clean, sans-serif;"><= font style=3D"font-family:Georgia;">1. As a convenience for creating protot= ypes/classes, assigning to an uppercase name adds a type slot with that nam= e to the right hand result.</font></font></font></div><br><div><font style= =3D"font-size:13px;"><font style=3D"font-family:Arial, helvetica, clean, sa= ns-serif;"><font style=3D"font-family:Georgia;">2. For efficiency, all immu= table strings and (IIRC) numbers within a certain range (maybe -100 to 100?= ) are singletons in Io=E2=80=99s implementation.</font></font></font></div>= <br><div><font style=3D"font-size:13px;"><font style=3D"font-family:Arial, = helvetica, clean, sans-serif;"><font style=3D"font-family:Georgia;">So when= you do:</font></font></font></div><br><div><font style=3D"font-size:13px;"= ><font style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font sty= le=3D"font-family:Georgia;">Foo :=3D 100</font></font></font></div><br><div= ><font style=3D"font-size:13px;"><font style=3D"font-family:Arial, helvetic= a, clean, sans-serif;"><font style=3D"font-family:Georgia;">It creates a ty= pe slot on the 100 singleton and sets it=E2=80=99s value to =E2=80=9CFoo=E2= =80=9D.</font></font></font></div><div><font style=3D"font-size:13px;"><fon= t style=3D"font-family:Arial, helvetica, clean, sans-serif;"><font style=3D= "font-family:Georgia;">Likewise for the immutable string =E2=80=9Cabc=E2=80= =9D in your example.</font></font></font></div><br><div><font style=3D"font= -size:13px;"><font style=3D"font-family:Arial, helvetica, clean, sans-serif= ;"><font style=3D"font-family:Georgia;">Hope this helps,</font></font></fon= t></div><div><font style=3D"font-size:13px;"><font style=3D"font-family:Ari= al, helvetica, clean, sans-serif;"><font style=3D"font-family:Georgia;">Ste= ve</font></font></font></div><br></div></div><div><font style=3D"font-size:= 13px;"><font style=3D"font-family:Arial, helvetica, clean, sans-serif;"><sp= an style=3D"color:rgb(255, 255, 255);"></span></font></font></div></div></d= iv></div></blockquote><img class=3D"mailspring-open" width=3D"0" height=3D"= 0" style=3D"width:0;height:0;" src=3D"https://link.getmailspring.com/open/l= [email protected]?recipient=3Diolanguage%40yahoogr= oups.com"></p> </div> =20=20=20=20=20 <!--~-|**|PrettyHtmlStart|**|-~--> <div style=3D"color: #fff; 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