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BOOK: Professional JavaScript for Web Developers ISBN: 978-0-7645-7908-0
This is the forum to discuss the Wrox book Professional JavaScript for Web Developers by Nicholas C. Zakas; ISBN: 9780764579080
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Old December 19th, 2006, 02:03 AM
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Default trim function on page 206

On page 206, you provide a trim function to trim white space,
String.prototype.trim = function () {
var reExtraSpace = /^\s+(.*?)\s+$/;
return this.replace(reExtraSpace, "$1");
var sTest = "  this is a test  ";
alert("[" + sTest + "]"); //outputs ¡° [ this is a test ] ¡°
alert("[" + sTest.trim() + "]"); //outputs ¡° [this is a test]¡±
But if the being of string to be trimmed has no white space, like "this is a test ", the method can't trim white space in the end, vice versa. So how about to change reExtraSpace to /^\s*(.*?)\s*$/? so that it can do the real trim work? I don't know if it's right. It's just my advice.
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Old December 19th, 2006, 01:46 PM
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This has already been reported as an issue. Please refer to the errata page for more information: http://www.wrox.com/WileyCDA/WroxTit...ew_errata.html

Nicholas C. Zakas
Author, Professional JavaScript for Web Developers (ISBN 0764579088)
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