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Unique fields that allow nulls in Django

...True when declaring the field, or otherwise Django will throw a validation error (field required) or create a db column that doesn't accept NULL. share | improve this answer | ...
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Why split the tag when writing it with document.write()?

...n XHTML without extra CDATA section wrapping, it's still a well-formedness error. Also you can use \x3C in inline event handler attributes where < would also be invalid in both HTML and XHTML, so it has a wider applicability: if I were choosing one, easily-automated way to escape sensitive charac...
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What is stack unwinding?

... world" ); // will be properly destructed if ( x ) throw std::runtime_error( "boom" ); delete [] pleak; // will only get here if x == 0. if x!=0, throw exception } int main() { try { func( 10 ); } catch ( const std::exception& e ) { return 1; } ...
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How to get a ListBox ItemTemplate to stretch horizontally the full width of the ListBox?

... Error: BindingExpression path error: 'Width' property not found on Project.CustomElement, Project.WindowsPhone, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. BindingExpression: Path='Width' DataItem=Project.CustomEl...
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Does Internet Explorer support pushState and replaceState?

... Btw you can get such error in reason of absolute path in pushState(). When i set relative path error was disappeared. share | improve this answe...
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How do you log all events fired by an element in jQuery?

...ly, it is possible you did something wrong. Have you checked your code for errors? – Codebeat Apr 8 at 20:32 There wer...
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View's SELECT contains a subquery in the FROM clause

... Looks to me as MySQL 3.6 gives the following error while MySQL 3.7 no longer errors out. I am yet to find anything in the documentation regarding this fix. share | impr...
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Proper use cases for Android UserManager.isUserAGoat()?

...the following produces a warning in Java (that can further produce compile errors if mixed with return statements, leading to unreachable code): while (1 == 2) { // Note that "if" is treated differently System.out.println("Unreachable code"); } However this is legal: while (isUserAGoat()) { ...
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In Python, how do I determine if an object is iterable?

...rts it being iterable but actually trying to iterate it causes an AttributeError (tested with Faker 4.0.2): >>> from faker import Faker >>> fake = Faker() >>> iter(fake) # No exception, must be iterable <iterator object at 0x7f1c71db58d0> >>> list(fake) ...
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Accessing localhost (xampp) from another computer over LAN network - how to?

...g **Require local** Replace with **Require all granted** ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var </Directory>``` Go to xampp > config > click on service and port setting and change apache port 8080 restart xampp then hit your IP:8080 (ex.192.168.1.156:8...