FAQ Topic - How do I trim whitespace? (2010-08-07)
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From: FAQ server on 6 Aug 2010 19:00 ----------------------------------------------------------------------- FAQ Topic - How do I trim whitespace? ----------------------------------------------------------------------- ECMAScript 5 defines `String.prototype.trim`. Where not supported, it can be added as a function that uses a regular expression: if(!String.prototype.trim) { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ""); }; } Implementations are inconsistent with `\s`. For example, some implementations, notably JScript 5.8 and Safari 2, do not match `\xA0` (no-break space), among others. A more consistent approach would be to create a character class that defines the characters to trim. <URL: https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/RegExp> <URL: http://thinkweb2.com/projects/prototype/whitespace-deviations/> <URL: https://developer.mozilla.org/en/Firefox_3.1_for_developers> <URL: http://docs.sun.com/source/816-6408-10/regexp.htm> <URL: http://msdn.microsoft.com/en-us/library/6wzad2b2%28VS.85%29.aspx> <URL: http://groups.google.com/group/comp.lang.javascript/browse_frm/thread/c7010139217600c3/31092c5eb99625d0?#31092c5eb99625d0> <URL: http://unicode.org/Public/UNIDATA/PropList.txt> The complete comp.lang.javascript FAQ is at http://jibbering.com/faq/ -- The sendings of these daily posts are proficiently hosted by http://www.pair.com.
From: Dr J R Stockton on 8 Aug 2010 14:56
In comp.lang.javascript message <4c5c93fa$0$273$14726298(a)news.sunsite.dk >, Fri, 6 Aug 2010 23:00:02, FAQ server <javascript(a)dotinternet.be> posted: > >Implementations are inconsistent with `\s`. For example, >some implementations, notably JScript 5.8 and Safari 2, do not match `\xA0` >(no-break space), among others. > While IE users may be reluctant to upgrade from, say, IE6 [*], I doubt whether there are enough Safari 2 users left to justify mentioning it - especially as IE8 serves as an example. <URL:http://www.merlyn.demon.co.uk/js-valid.HTM#RsT> in IE8 : Scripting is :- JScript 5.8.22960 In this browser, working on string All : \s matches : 6 : [ 0009 000a 000b 000c 000d 0020 ] Remember that \w is defective in IE8, matching also dotted-I, in both JScript and VBscript. [*] <http://www.telegraph.co.uk/technology/microsoft/7928193/Upgrading- from-IE6-is-too-complicated-says-Government.html> -- (c) John Stockton, nr London UK. ?@merlyn.demon.co.uk IE8 FF3 Op10 Sf4 Cr4 news:comp.lang.javascript FAQ <URL:http://www.jibbering.com/faq/index.html>. <URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources. <URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links. |