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dict常用操作
dict是python中的常用数据结构,应该尽量掌握其使用方法 """ 初始化一个dict的四种方式: 1. dict() -> 创建一个空的dict 2. dict(mapping) -> new dictionary initialized from a mapping object's (ke ...
分类:其他好文   时间:2019-12-13 23:12:52    阅读次数:70
1046 Shortest Distance (20分)
The task is really simple: given N exits on a highway which forms a simple cycle, you are supposed to tell the shortest distance between any pair of e ...
分类:其他好文   时间:2019-12-13 21:30:03    阅读次数:99
[LC] 70. Climbing Stairs
You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl ...
分类:其他好文   时间:2019-12-13 14:08:00    阅读次数:76
C# 获取电脑SN号
/// <summary> /// 获得电脑SN号 /// </summary> public static string GetPcsnString() { var pcsn = ""; try { var search = new ManagementObjectSearcher("SELECT ...
分类:Windows程序   时间:2019-12-13 09:17:55    阅读次数:160
Mybatis全部标签与解释说明
一、定义SQL语句 (1)select 标签的使用 属性介绍: id :唯一的标识符. parameterType:传给此语句的参数的全路径名或别名 例:com.test.poso.User或user resultType :语句返回值类型或别名。注意,如果是集合,那么这里填写的 是集合的泛型,而不 ...
分类:其他好文   时间:2019-12-13 00:00:06    阅读次数:92
[Unit test] jasmine createSpyObj
beforeEach(() => { contextStub = { debug: false, engine: jasmine.createSpyObj('engine', [ 'createCollection', 'createContext', 'createSchematic', 'cre... ...
分类:其他好文   时间:2019-12-12 21:12:13    阅读次数:198
[LC] 129. Sum Root to Leaf Numbers
Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the root-to-leaf path 1->2->3 whic ...
分类:其他好文   时间:2019-12-12 13:14:24    阅读次数:93
PTA(Advanced Level)1044.Shopping in Mars
Shopping in Mars is quite a different experience. The Mars people pay by chained diamonds. Each diamond has a value (in Mars dollars ). When making th ...
分类:其他好文   时间:2019-12-12 12:56:26    阅读次数:93
016_List/Set/Map
先写一下3这种遍历方法 for循环 List<Teacher> list = new ArrayList<>(); list.add(new Teacher("张三",21)); list.add(new Teacher("李四",28)); list.add(new Teacher("王五",18 ...
分类:其他好文   时间:2019-12-11 21:18:32    阅读次数:68
reentrant,thread-safe 和 async-signal-safe
可重入,线程安全和异步信号安全POSIX定义: Reentrant Function A function whose effect, when called by two or more threads, is guaranteed to be as if the threads each exe ...
分类:其他好文   时间:2019-12-11 21:04:41    阅读次数:100
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