unchecked

How do I to catch check/uncheck event of <input type="checkbox" /> with jQuery? marcgg <input type="checkbox" id="something" /> $("#something").click( function(){ if( $(this).is(':checked') ) alert("checked"); }); Edit: Doing this will not catch when the checkbox changes for other reasons than a click, like using the keyboard. To avoid this problem, listen to change instead of click . For checking/unchecking programmatically, take a look at Why isn't my checkbox change event triggered? The click will affect a label if we have one attached to the input checkbox? I think that is better to use

I try to cast an object to my Action class, but it results in a warning: Type safety: Unchecked cast from Object to Action<ClientInterface> Action<ClientInterface> action = null; try { Object o = c.newInstance(); if (o instanceof Action<?>) { action = (Action<ClientInterface>) o; } else { // TODO 2 Auto-generated catch block throw new InstantiationException(); } [...] Thank you for any help Jon Skeet Yes - this is a natural consequence of type erasure . If o is actually an instance of Action<String> that won't be caught by the cast - you'll only see the problem when you try to use it, passing

int y = -2147483648; int z = unchecked(y / -1); The second line causes an OverflowException . Shouldn't unchecked prevent this? For example: int y = -2147483648; int z = unchecked(y * 2); doesn't cause an exception. This is not an exception that the C# compiler or the jitter have any control over. It is specific to Intel/AMD processors, the CPU generates a #DE trap (Divide Error) when the IDIV instruction fails. The operating system handles the processor trap and reflects it back into the process with a STATUS_INTEGER_OVERFLOW exception. The CLR dutifully translates it to a matching managed

Somehow my old question was closed, so I open a new one: I am using Java Generics to implement a generic bidirectional Hash Map out of an SQL Query. It should be able to map any combination of String, Integer pairs back and forth. It should be used like this: String sql = "SELECT string_val, int_val FROM map_table"; PickMap<String, Integer> pm1 = new PickMap<String, Integer>(sql); String key1 = "seven"; Integer value1 = pm1.getLeft2Right(key1); Integer key2 = 7; String value2 = pm1.getRightToLeft(key2); Of course it should be possible to create an pm (Integer, Integer) and so on... My

I've been reading about unchecked versus checked questions, none of the online resources have been truly clear about the difference and when to use both. From what I understand, both of them get thrown at runtime, both of them represent program states that are outside the expected bounds of the logic, but checked exceptions must be explicitly caught while unchecked ones do not. My question is, suppose for argument's sake I have a method that divides two numbers double divide(double numerator, double denominator) { return numerator / denominator; } and a method that requires divison somewhere

When I check a checkbox, I want it to turn <p> #0099ff . When I uncheck the checkbox, I want it to undo that. Code I have so far: $('#checkbox').click(function(){ if ($('#checkbox').attr('checked')) { /* NOT SURE WHAT TO DO HERE */ } }) jensgram I would use .change() and this.checked : $('#checkbox').change(function(){ var c = this.checked ? '#f00' : '#09f'; $('p').css('color', c); }); -- On using this.checked Andy E has done a great write-up on how we tend to overuse jQuery: Utilizing the awesome power of jQuery to access properties of an element . The article specifically treats the use of

@uncheckedVariance can be used to bridge the gap between Scala's declaration site variance annotations and Java's invariant generics. scala> import java.util.Comparator import java.util.Comparator scala> trait Foo[T] extends Comparator[T] defined trait Foo scala> trait Foo[-T] extends Comparator[T] <console>:5: error: contravariant type T occurs in invariant position in type [-T]java.lang.Object with java.util.Comparator[T] of trait Foo trait Foo[-T] extends Comparator[T] ^ scala> import annotation.unchecked._ import annotation.unchecked._ scala> trait Foo[-T] extends Comparator[T

I think I get what unchecked cast means (casting from one to another of a different type), but what does it mean to "Check" the cast? How can I check the cast so that I can avoid this warning in Eclipse? Unchecked cast means that you are (implicitly or explicitly) casting from a generic type to a nonqualified type or the other way around. E.g. this line Set<String> set = new HashSet(); will produce such a warning. Usually there is a good reason for such warnings, so you should try to improve your code instead of suppressing the warning. Quote from Effective Java, 2nd Edition: Eliminate every