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How do I check if an HTML element is empty using jQuery?
I'm trying to call a function only if an HTML element is empty, using jQuery.
17 Answers
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what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
I am wondering what is the best way to convert a json formatted key value pair to ruby hash with symbol as key:
example:
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Passing data to Master Page in ASP.NET MVC
What is your way of passing data to Master Page (using ASP.NET MVC) without breaking MVC rules?
9 Answers
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Unable to cast object of type 'System.DBNull' to type 'System.String`
I got the above error in my app. Here is the original code
11 Answers
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How do I erase an element from std::vector by index?
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edited Dec 6 '16 at 18:34
Peter Mortensen
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Cannot set some HTTP headers when using System.Net.WebRequest
...t to know better, read it all, and i hope you'll enjoy...
I countered this problem too today, and what i discovered today is that:
the above answers are true, as:
1.1 it's telling you that the header you are trying to add already exist and you should then modify its value using the appropria...
JavaScript isset() equivalent
In PHP you can do if(isset($array['foo'])) { ... } . In JavaScript you often use if(array.foo) { ... } to do the same, but this is not exactly the same statement. The condition will also evaluate to false if array.foo does exists but is false or 0 (and probably other values as well).
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How can I convert a string to boolean in JavaScript?
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Do:
var isTrueSet = (myValue == 'true');
You could make it stricter by using the identity operator (===), which doesn't make any implicit type conversions when the compared variables have different types, instead of the equality op...
When can I use a forward declaration?
...mpiler's position: when you forward declare a type, all the compiler knows is that this type exists; it knows nothing about its size, members, or methods. This is why it's called an incomplete type. Therefore, you cannot use the type to declare a member, or a base class, since the compiler would nee...
Ball to Ball Collision - Detection and Handling
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To detect whether two balls collide, just check whether the distance between their centers is less than two times the radius. To do a perfectly elastic collision between the balls, you only need to worry about the component of the velocity that is in the direction of the collision. The...