swap

Is there a native jQuery function to switch elements?

由 淺唱寂寞╮ 提交于 2019-11-26 00:41:33
Can I easily swap two elements with jQuery? I'm looking to do this with one line if possible. I have a select element and I have two buttons to move up or down the options, and I already have the selected and the destination selectors in place, I do it with an if, but I was wondering if there is an easier way. I've found an interesting way to solve this using only jQuery: $("#element1").before($("#element2")); or $("#element1").after($("#element2")); :) bobince Paulo's right, but I'm not sure why he's cloning the elements concerned. This isn't really necessary and will lose any references or

What can I do with a moved-from object?

由 假如想象 提交于 2019-11-26 00:07:38
问题 Does the standard define precisely what I can do with an object once it has been moved from? I used to think that all you can do with a moved-from object is do destruct it, but that would not be sufficient. For example, take the function template swap as defined in the standard library: template <typename T> void swap(T& a, T& b) { T c = std::move(a); // line 1 a = std::move(b); // line 2: assignment to moved-from object! b = std::move(c); // line 3: assignment to moved-from object! }

convert big endian to little endian in C [without using provided func] [closed]

由 我们两清 提交于 2019-11-25 23:34:03
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I need to write a function to convert big endian to little endian in C. I can not use any library function. 回答1: Assuming what you need is a simple byte swap, try something like Unsigned 16 bit conversion: swapped = (num>>8) | (num<<8); Unsigned 32-bit conversion: swapped = ((num>>24)&0xff) | // move byte 3 to

Is there a standardized method to swap two variables in Python?

由 南楼画角 提交于 2019-11-25 22:07:31
问题 In Python, I\'ve seen two variable values swapped using this syntax: left, right = right, left Is this considered the standard way to swap two variable values or is there some other means by which two variables are by convention most usually swapped? 回答1: Python evaluates expressions from left to right. Notice that while evaluating an assignment, the right-hand side is evaluated before the left-hand side. http://docs.python.org/3/reference/expressions.html#evaluation-order That means the
订阅 swap