appendVector

``` - 编程语言与开发 a = append(a, b…)


copy
====

``` - 编程语言与开发
b = append([]T(nil), a...)

``` - 编程语言与开发 b = make([]T, len(a)) copy(b, a)


cut删除一段范围i\~j
===================

``` - 编程语言与开发
copy(a[i:], a[j:])
for k, n := len(a) - j + i, len(a); k < n; k++ {
    a[k] = nil //or the zero value of T
}
a = a[:len(a) - j + i]

delete删除指定i

``` - 编程语言与开发 copy(a[i:], a[i+1:] a[len(a] - 1] = nil //or zero value of T a = a[:len(a)-1]


expand 在i位置扩展j个位置出来
=============================

``` - 编程语言与开发
a = append(a[:i], append(make([]T, j), a[i:]...)...)

extend 在最后扩展j个位置

``` - 编程语言与开发 a = append(a, make([]T, j)…)


insert 在i位置插入
==================

``` - 编程语言与开发
a = append(a[:i], append([]T{x}, a[i:]...)...)

这里创建了一个新的slice,然后拷贝a的后半截到新slice,在拷贝新的slice到a,这里两次拷贝。
下面方法一次拷贝

``` - 编程语言与开发 a = append(a, nil)//or zero value of T copy(a[i+1:], a[i:]) a[i] = x


insertVector 插入vector b
=========================

``` - 编程语言与开发
a = append(a[:i], append(b, a[i:]...)...)

pop

``` - 编程语言与开发 x, a = a[len(a)-1], a[:len(a)-1]


push
====

``` - 编程语言与开发
a = append(a, x)

shift

``` - 编程语言与开发 x, a := a[0], a[i:]


unshift
=======

``` - 编程语言与开发
a = append([]T{x}, a...)

filter

``` - 编程语言与开发 b := a[:0] for _, x := range a { if f(x) { b = append(b, x) } }


reversing
=========

``` - 编程语言与开发
for left, right := 0, len(a) - 1; left < right; left, right = left - 1, right - 1 {
    a[left], a[right] = a[right], a[left]
}