FAQ Topic - How do I trim whitespace? (2010-04-07)
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From: Garrett Smith on 10 Apr 2010 16:09 Thomas 'PointedEars' Lahn wrote: > Garrett Smith wrote: > >> Thomas 'PointedEars' Lahn wrote: >>> Garrett Smith wrote: >>>> Thomas 'PointedEars' Lahn wrote: >>>>> Garrett Smith wrote: >>>>>> Thomas 'PointedEars' Lahn wrote: >>>>>>> return String(this).replace(/^\s+|\s+$/g, ""); [...] >>>>> Host objects SHOULD NOT be augmented with properties, or be used as >>>>> first argument to Function.prototype.call() or >>>>> Function.prototype.apply(). Your argument is not logical. >>> did you not get? >> I understand and agree. However, it is reasonable to allow for an object >> to be the first argument to `trim`. > > What the heck are you talking about? String.prototype.trim() takes no > arguments per ES5! > Right. I meant the `this` argument. -- Garrett comp.lang.javascript FAQ: http://jibbering.com/faq/
From: Thomas 'PointedEars' Lahn on 10 Apr 2010 16:25 Garrett Smith wrote: > Thomas 'PointedEars' Lahn wrote: >> Garrett Smith wrote: >>> Thomas 'PointedEars' Lahn wrote: >>>> Garrett Smith wrote: >>>>> Thomas 'PointedEars' Lahn wrote: >>>>>> Garrett Smith wrote: >>>>>>> Thomas 'PointedEars' Lahn wrote: >>>>>>>> return String(this).replace(/^\s+|\s+$/g, ""); > [...] >>>>>> Host objects SHOULD NOT be augmented with properties, or be used as >>>>>> first argument to Function.prototype.call() or >>>>>> Function.prototype.apply(). Your argument is not logical. >>>> did you not get? >>> I understand and agree. However, it is reasonable to allow for an >>> object to be the first argument to `trim`. >> >> What the heck are you talking about? String.prototype.trim() takes no >> arguments per ES5! > > Right. I meant the `this` argument. And as I already pointed out above, it is _not_ reasonable for that to refer to a host object. Anyhow, if it refers to an object, that object must have or inherit a toString() or valueOf() method, or a TypeError exception must be thrown. So as Asen pointed out, the user-defined implementation in the FAQ works differently than the standards-compliant implementation of the method, when the goal was to provide a fallback in case the standards-compliant implementation of the method was not available. Now where is the logic in that? PointedEars -- realism: HTML 4.01 Strict evangelism: XHTML 1.0 Strict madness: XHTML 1.1 as application/xhtml+xml -- Bjoern Hoehrmann
From: Dr J R Stockton on 10 Apr 2010 15:30 In comp.lang.javascript message <hpmad2$bdl$1(a)news.eternal- september.org>, Thu, 8 Apr 2010 21:28:15, Garrett Smith <dhtmlkitchen(a)gmail.com> posted: > >>> Why not just put "For example, MSIE 8 does not match ..." and maybe add >>> the version of the script engine. Currently I have JScript 5.8.22960. >>> >> OK. That is more specific; sounds like an improvement. I'll add and >>update the FAQ with that. > >On second thought, mentioning IE8 potentially misleading because it is >incomplete. Safari 2 and Konqueror also do not match no-break space. >The chart in the article from that entry has test results of what is >and what is not matched in various browsers. >http://perfectionkills.com/whitespace-deviations/ The "For example" accommodates that, for the literate. In general, ISTM that the FAQ should consider IE6 & possibly earlier, because IE comes with Windows and some Web users upgrade nothing. But those who have chosen to install non-IE in a PC are much more likely to update it at least occasionally. Normal usage of Safari 2 should by now be insignificant. -- (c) John Stockton, nr London UK. ?@merlyn.demon.co.uk Turnpike v6.05 MIME. Web <URL:http://www.merlyn.demon.co.uk/> - FAQish topics, acronyms, & links. Proper <= 4-line sig. separator as above, a line exactly "-- " (RFCs 5536/7) Do not Mail News to me. Before a reply, quote with ">" or "> " (RFCs 5536/7)
From: Garrett Smith on 10 Apr 2010 19:03
Thomas 'PointedEars' Lahn wrote: > Garrett Smith wrote: > >> Thomas 'PointedEars' Lahn wrote: >>> Garrett Smith wrote: >>>> Thomas 'PointedEars' Lahn wrote: >>>>> Garrett Smith wrote: >>>>>> Thomas 'PointedEars' Lahn wrote: >>>>>>> Garrett Smith wrote: >>>>>>>> Thomas 'PointedEars' Lahn wrote: >>>>>>>>> return String(this).replace(/^\s+|\s+$/g, ""); [...] > So as Asen pointed out, the user-defined implementation in the FAQ works > differently than the standards-compliant implementation of the method, when > the goal was to provide a fallback in case the standards-compliant > implementation of the method was not available. Now where is the logic in > that? So we should be throwing TypeError for that case. I can't say I like that much, but if it is what is required by the specification, and this method is a fallback, then it should follow that. -- Garrett comp.lang.javascript FAQ: http://jibbering.com/faq/ |