Path: csiph.com!weretis.net!feeder8.news.weretis.net!news.mb-net.net!open-news-network.org!.POSTED.178.197.216.189!not-for-mail From: Thomas 'PointedEars' Lahn Newsgroups: comp.lang.javascript Subject: Re: Decimal numeric string to hexadecimal numeric string? Date: Thu, 01 Jul 2021 12:43:53 +0200 Organization: PointedEars Software (PES) Lines: 85 Message-ID: <7969540.pbqncKrJha@PointedEars.de> References: <233183ba-98dc-47d5-84f6-bd3beef1e793n@googlegroups.com> <87fsxegmpj.fsf@bsb.me.uk> <20837730.9tcgPO3Tcr@PointedEars.de> <0d312dec-5b2c-4a8b-9bb0-fe0c1fd867f9n@googlegroups.com> Reply-To: Thomas 'PointedEars' Lahn Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8Bit Injection-Info: gwaiyur.mb-net.net; posting-host="178.197.216.189"; logging-data="9755"; mail-complaints-to="abuse@open-news-network.org" User-Agent: KNode/4.14.10 Cancel-Lock: sha1:FldLylVTLrMtNyLTHlNMQwRwgAc= Face: 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 X-User-ID: U2FsdGVkX19ajDe0i4AENemgcD5Wa0FKhyI4CbzTLlMu5UMEXcaldA== X-Face: %i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&. On Wednesday, June 30, 2021 at 5:51:16 PM UTC-5, Thomas 'PointedEars' Lahn > wrote: >> parseInt() should not be called without a radix value because then the >> interpretation of the string depends on its prefix. This is a FAQ. > > The FAQ should be updated. I am still waiting for, and am looking forward to, your pull requests *shrug* > This now depends on the browser version. Not really, see below. > With the following: > > parseInt("070") > > I see these results: > > Brave (Chromium 91): 70 > Firefox : 89: 70 > IE 11: 70 > IE 10: 70 > IE 9: 70 > IE 8: 56 > IE 7: 56 > IE 5: 56 > > > > (When testing on older browsers use the debug view) The interpretation of octal string literals by parseInt() without “radix” argument *always* depended on the "browser version", more precisely the ECMAScript implementation supported, and the version of the script engine used, by the runtime environment. That is *the* reason why the FAQ recommends to specify the “radix” argument since time immemorial: Compare with Microsoft Internet Explorer/MSHTML 5.0 through 8.0 support/use Microsoft JScript 5.0 through 5.8.x which implement ECMAScript Ed. 3/5.x¹; whereas IE/MSHTML 9 and 10 support/use JScript 9.0 and 10.0.x, which implement ECMAScript Ed. 5.x. The latest version of Firefox supports Mozilla JavaScript 78 and later (I have only Firefox 78 here), and uses a recent version of Mozilla SpiderMonkey, which implements ECMAScript 2020 or later. Chromium 91 supports Google JavaScript 9.0.257.29 or later, and uses Google V8, which implements ECMAScript 2020 or later. So your results are unsurprising (but valuable²) to me. See also: BTW, it is July in Europe now, so ECMAScript 2021 was "released" :-o _______ ¹ Here we can see that an ECMAScript implementation does not always meet what is unambiguously specified in the Edition that it claims to implement. ² Strangely enough, I do not have a test case for that in the ECMAScript Support Matrix yet: -- PointedEars FAQ: | | Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.