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Do I really need to encode '&' as '&'?

... Yes. Just as the error said, in HTML, attributes are #PCDATA meaning they're parsed. This means you can use character entities in the attributes. Using & by itself is wrong and if not for lenient browsers and the fact that this is HTML no...
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How to read an external properties file in Maven

... Thanks for a working example. However, why I got an error of Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:properties-maven-plugin:1.0-alpha-1:read-project-properties (execution: default, phase: initialize) – WesternGun ...
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What does the `#` operator mean in Scala?

...a2 = new A a2: A = A@4bed4c8 scala> a2.f(new a1.B) <console>:11: error: type mismatch; found : a1.B required: a2.B a2.f(new a1.B) ^ When you declare a class inside another class in Scala, you are saying that each instance of that class has such a subc...
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Checking for empty arrays: count vs empty

... empty() is too forgiving of errors. I just spent 2 hours debugging a subclass that tested empty() on a private member variable of its superclass (the scope of the superclass's member variable SHOULD have been protected, but empty() returned no errors ...
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How do I set up email confirmation with Devise?

...evise no longer provides migration helpers, and so t.confirmable raises an error. Instead, copy the block labeled "Confirmable" from their migration guide. 3. Generate the devise views, with either of the following commands,so you can override the devise mailer views: rails generate devise:views #...
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Rails migration: t.references with alternative name?

...fy a foreign_key option in the table creation like this ways, it raises an error saying the very table I'm creating doesn't exist... So I suspect it's not really supported by the official API. – Quv Nov 7 '17 at 3:53 ...
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How to [recursively] Zip a directory in PHP?

...cluded. Optional localname is supported, as in other ZipArchive functions. Error handling code to be added... class ExtendedZip extends ZipArchive { // Member function to add a whole file system subtree to the archive public function addTree($dirname, $localname = '') { if ($localn...
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Float vs Decimal in ActiveRecord

...an insufficient format for latitude and longitude. Yo will eventually have errors in the least significant digits. – Lonny Eachus Jun 24 '16 at 20:03 ...
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How to convert a string to an integer in JavaScript?

...px", but it's also somewhat dangerous, since it won't give you any kind of error on bad input, instead you'll get back NaN unless the string starts with a number. Whitespace at the beginning of the string is ignored. Here's an example of it doing something different to what you want, and giving no ...
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What are “signed” cookies in connect/expressjs?

... the signature attached to it. If it does not match, then it will give an error. If you want to hide the contents of the cookie as well, you should encrypt it instead (or just stores it in the server side session). I'm not sure if there is middleware for that already out there or not. Edit And t...