checked

问题 I have the following CodePen: Test LCD with CSS Variables, in which upon clicking labels with specific digits, results in the appropriate LCD segments to be "lit" based on algebraic equations I've determined to mimic a BCD to 7-Segment Display Decoder, in order to simulate an LCD display... I currently have the first segment's equation mentioned in the CSS. Clicking on a digit in the CSS should theoretically result in the appropriate four --input variables to be populated with a pulse (0 or 1

来源： https://stackoverflow.com/questions/16541574/i-want-to-display-all-checkboxes-value-which-are-checked

问题 What is the difference between checked(a + b) and unchecked(a + b) ? 回答1: Those are operators that check (or do not check) for overflow in the resulting numerical operation. In the checked case, an OverflowException exception is raised if the result of the operation exceeds the minimum or maximum value allowed for the datatype. More information is available from MSDN. 回答2: It controls overflow checking for integer operations. 回答3: if a + b is larger than the maximum value of the datatype,

问题 What is the difference between checked(a + b) and unchecked(a + b) ? 回答1: Those are operators that check (or do not check) for overflow in the resulting numerical operation. In the checked case, an OverflowException exception is raised if the result of the operation exceeds the minimum or maximum value allowed for the datatype. More information is available from MSDN. 回答2: It controls overflow checking for integer operations. 回答3: if a + b is larger than the maximum value of the datatype,

问题 Has anyone found it strange that the default context for uint and ulong is unchecked rather than checked considering that they are meant to represent values that can never be negative? So if some code is trying to violate that constraint it seems to me the natural and preferred behaviour would be to throw an exception rather than returning the max value instead (which can easily leave important pieces of data in an invalid state and impossible to revert..). Is there an existing attribute

问题 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. 回答1: 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

问题 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. 回答1: 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

问题 I have a very long form with groups of fields. When a radio field is selected, I need it to also select several "hidden" fields in the same div and to pass those values on submission. If another radio is selected, than these hidden fields need to clear, and instead the other group's are selected. Example 1 - Radio 1 is selected which selects all hidden fields in same div/fieldset: Group A: Radio 1 (checked) Hidden Field 1a (checked) Hidden Field 1b (checked) Hidden field 1c (checked) Group B:

问题 I have a very long form with groups of fields. When a radio field is selected, I need it to also select several "hidden" fields in the same div and to pass those values on submission. If another radio is selected, than these hidden fields need to clear, and instead the other group's are selected. Example 1 - Radio 1 is selected which selects all hidden fields in same div/fieldset: Group A: Radio 1 (checked) Hidden Field 1a (checked) Hidden Field 1b (checked) Hidden field 1c (checked) Group B:

问题 I have a great piece of jQuery that swaps an image when the user hovers on an image. Check out the code below to see it. It uses mouseenter and mouseleave . I would like to modify it so that the image swap triggers when a specific input/label is :checked . You can see my demo page here: http://test.davewhitley.com/not-wp/static_folder/index.php To give you some background, I have 4 inputs/labels. When one is checked, a group of images will be swapped from black and white to their color