Go 语言中的运算符

Posted 2021-09-07 小伍

运算符

Go 语言没有前置的 ++ 和 -- 运算符。

package operator_test

import (
    "fmt"
) //引入代码依赖

func TestCompareArray(t *testing.T) {
    a := [...]int{1, 2, 3, 4}
    b := [...]int{1, 3, 2, 4}
    c := [...]int{1, 2, 3, 4, 5}
    d := [...]int{1, 2, 3, 4}
    
    t.Log(a == b) //false
    t.Log(a == c) //编译报错，长度不一致
    t.Log(a == d) //true
}

按位清零运算符。

const (
    Readable = 1 << iota
    Writable
    Executable
)

func TestBitClear(t *testing.T) {
    a := 7               //0111
    a = a &^ Readable    //清除读权限
    a = a &^ Executable  //清除执行权限
    t.Log(a&Readable == Readable, a&Writable == Writable, a&Executable == Executable)
}