Golang---基本类型(slice)

  摘要： 今天我们来学习 Golang 中的一个基本的数据结构 slice, 这个和 C++ 中的 vector 容器思想基本一致，是一个容量可变的数组，那我们就来看下它和 array 的区别和联系，并对其中的典型操作给出分析。

 

数据结构

// StringHeader is the runtime representation of a string.
// It cannot be used safely or portably and its representation may
// change in a later release.
// Moreover, the Data field is not sufficient to guarantee the data
// it references will not be garbage collected, so programs must keep
// a separate, correctly typed pointer to the underlying data.
type StringHeader struct {
    Data uintptr
    Len  int
}

// stringHeader is a safe version of StringHeader used within this package.
type stringHeader struct {
    Data unsafe.Pointer
    Len  int
}

// SliceHeader is the runtime representation of a slice.
// It cannot be used safely or portably and its representation may
// change in a later release.
// Moreover, the Data field is not sufficient to guarantee the data
// it references will not be garbage collected, so programs must keep
// a separate, correctly typed pointer to the underlying data.
type SliceHeader struct {
    Data uintptr
    Len  int
    Cap  int
}

// sliceHeader is a safe version of SliceHeader used within this package.
type sliceHeader struct {
    Data unsafe.Pointer
    Len  int
    Cap  int
}

slice-struct