相关疑难解决方法(0)

有人可以解释GO lang中&和*之间的区别吗？并举例说明何时使用&和*来说明差异？根据我的阅读,它们都与访问变量内存位置有关,但我不知道何时使用&或*.

// NewReaderSize returns a new Reader whose buffer has at least the specified
43  // size. If the argument io.Reader is already a Reader with large enough
44  // size, it returns the underlying Reader.
45  func NewReaderSize(rd io.Reader, size int) *Reader {
46      // Is it already a Reader?
47      b, ok := rd.(*Reader)
48      if ok && len(b.buf) >= size {
49          return b
50      }
51      if size < minReadBufferSize {
52          size = minReadBufferSize
53      } …