Lecture 1 操作系统概述 https://pdos.csail.mit.edu/6.828/2018/lec/l-overview.txt
概述
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6.828 课程目标：
- 理解操作系统设计和实现
- 自己开发一个小型操作系统，获得一手经验
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操作系统的意义：
melon8
欧几里得最大公约数求法
a b (a >= b)
24 16
16 8
8 0
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| ios7下新增了一个属性textContainerInset， | |
| self.textView.textContainerInset = UIEdgeInsetsMake(10, 10, 0, 10);//设置页边距 | |
| 上边距10，左右边距各10，底边距0 |
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| import Foundation | |
| import Alamofire | |
| import SwiftyJSON | |
| import ObjectMapper | |
| import PromiseKit | |
| (用回调callback方法) | |
| static let baseURL = "http://api.classmart.cn/api/dev" | |
| static var deviceId: String? |