golang sorting algorithm and data construction.

Overview

data-structures-questions

算法和程序结构是我们学习编程的基础,但是很多的时候,我们很多都是只是在应用,而没有深入的去研究这些,所以自己也在不断的思考和探索,然后分析,学习,总结自己学习的过程,希望可以和大家一起学习和交流下算法!

目录

data-structures-questions

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License

This is free software distributed under the terms of the MIT license

Comments
  • 10.Redis事物的了解CheckAndSet操作实现乐观锁 - 回答中 涉及

    10.Redis事物的了解CheckAndSet操作实现乐观锁 - 回答中 涉及"回滚" 部分描述有误?

    回答中说到 Redis 会进行回滚??官方文档上说的是 Redis 是不支持回滚的。如果在事务中的某条命令发生错误,Redis 会继续把剩下的命令都执行完,保证原子性,但是,Redis 的数据不会回到事务执行之前的了。

    另外回答中还说到一点,把 DISCARD 看作关系数据库中的 ROLLBACK,似乎也不对吧....... 关系型数据库(MySQL)中事务回滚靠的不是回滚日志么.... 也就是说 INSERT 了一条数据,回滚日志中会有一条 DELETE 命令。但是 DISCARD 是刷新事务队列,退出事务。并不能 ROLLBACK 吧。。。。。。。。。。。。

    如果我疑问的部分有什么不对,欢迎大家指正... 冒昧了..

    opened by LydiaCai1203 2
  • 关于 defer 函数的使用,输出结果是否有问题

    关于 defer 函数的使用,输出结果是否有问题

    Go中的defer函数使用下面的两种情况下结果是什么

    Go中的defer函数使用下面的两种情况下结果是什么 我们看看下面两种defer函数的返回的是什么:

    	a := 1
    	defer fmt.Println("the value of a1:",a)
    	a++
    
    	defer func() {
    		fmt.Println("the value of a2:",a)
    	}()
    

    运行:

    the value of a1: 1
    the value of a1: 2
    

    这里运行结果是否写错了? 运行环境 go 1.16 mac

    the value of a2: 2
    the value of a1: 1
    
    opened by youngxhui 1
  • 关于zset的疑问

    关于zset的疑问

    这部分内容是不是可以考虑修正下?我看源码注释是说的使用了跳表和hash表,其编码是使用了压缩链表或跳表

    https://github.com/KeKe-Li/data-structures-questions/blob/master/src/chapter05/golang.01.md#Redis%E6%9C%89%E5%BA%8F%E9%9B%86%E5%90%88zset%E5%BA%95%E5%B1%82%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%E7%9A%84

    参考链接:

    https://github.com/redis/redis/blob/unstable/src/t_zset.c#L39 http://redisbook.com/preview/object/sorted_set.html

    opened by ECUST-XX 1
  • question

    question

    image

    1. go defer 使用 f2() 和 f3() 貌似一样?
    f2: defer 是在 t 赋值给 r 之后执行的,而 defer 延迟函数只改变了 t 的值,r 不变。正确答案 5。
    
    f3: 这里将 r 作为参数传入了 defer 表达式。故 func (r int) 中的 r 非 func f() (r int) 中的 r,只是参数命名相同而已。正确答案 1。
    

    推测是 f2() 例子不小心贴错?还望得到回复,谢谢。

    opened by ronething 1
  • 提问

    提问

    https://github.com/KeKe-Li/data-structures-questions/blob/master/src/chapter05/golang.01.md

    501 line

    另一种情况是P所分配的任务G很快就执行完了(分配不均),这就导致了这个处理器P很忙,但是其他的P还有任务,此时如果global runqueue没有任务G了,那么P不得不从其他的P里拿一些G来执行。

    "这就导致了这个处理器P很忙",这里指的是 P 已经将 G 执行完成了,所以是忙还是闲,还望得到您的回复,谢谢

    opened by ronething 1
  • Go 默认stack大小2KB吧?

    Go 默认stack大小2KB吧?

    分块式的栈是最初Go语言组织栈的方式。当创建一个goroutine的时候,它会分配一个8KB的内存空间来给goroutine的栈使用。我们可能会考虑当这8KB的栈空间被用完的时候该怎么办?

    Go默认stack大小2KB吧,Go 源代码如下:

    // The minimum size of stack used by Go code _StackMin = 2048

    if newg == nil { newg = malg(_StackMin) casgstatus(newg, _Gidle, _Gdead) allgadd(newg) // publishes with a g->status of Gdead so GC scanner doesn't look at uninitialized stack. }

    opened by xuesongbj 1
  • 有关 TIME-WAIT 含义描述的疑问

    有关 TIME-WAIT 含义描述的疑问

    作者大大你好,请问您在网络问题的第 3 题中关于 TIME-WAIT 含义的描述替换为以下描述是否更加无异议?

    原:客户端收到服务端的FIN包,并立即发出ACK包做最后的确认,在此之后的2MSL时间称为TIME_WAIT状态。

    现:主动请求关闭连接的那一端收到被动关闭连接的另一端发送来的FIN包,并立即发出ACK包做最后的确认,在此之后的 2 MSL 时间称为 TIME-WAIT 状态。

    opened by LOMOGO 0
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