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Java基础1

Posted on 2020-07-01
Words count in article: 4.9k | Reading time ≈ 22
Java基础1Getting StartedAnatomy of a Java ProgramJava的 函数 我们常常把第一个花括号与函数声明放在一行。但是C,C#常常是另起一行 123void sendEmail(){} 每一个Java程序都必须有一个main函数,也就是主函 ...
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Linux基础

Posted on 2020-06-30
Words count in article: 9.3k | Reading time ≈ 37
Linux基础System Access and File SystemCommand Prompts 命令提示符 当我们的终端没有出现命令提示符的时候,说明终端在运作或者卡住了,这时候我们需要用 ctrl+c 来 get our prompt back.就像下面这张图。当我们ctrl+c的时候,命 ...
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离散数学之图3

Posted on 2020-06-30 | In 图
Words count in article: 1.5k | Reading time ≈ 6
离散数学之图3Euler Paths and CircuitsDefinition定义:An Euler circuit in a graph G is a simple circuit containing every edge of G. An Euler path in G is a simp ...
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离散数学之图2

Posted on 2020-06-30 | In 图
Words count in article: 2.8k | Reading time ≈ 13
离散数学之图2Representing GraphsAdjacency Lists邻接表 Way i: One way to represent a graph without multiple edges is to list all the edges of this graph.Way ii: ...
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reactHooksWithD3

Posted on 2020-06-29
Words count in article: 2.1k | Reading time ≈ 9
Using ReactHooks With D3 教程: https://www.youtube.com/watch?v=hR8xtl_IbCw&list=PLDZ4p-ENjbiPo4WH7KdHjh_EMI7Ic8b2B&index=3&pbjreload=101 源码: ...
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php基础

Posted on 2020-06-28
Words count in article: 4k | Reading time ≈ 17
php基础 教程: https://www.youtube.com/watch?v=Z0zx5pA9lqI&list=PLLAZ4kZ9dFpNJvT-JKogcCySuSznPpXEp&index=3 配合教程: https://www.w3school.com.cn/php/ph ...
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mysql基础下

Posted on 2020-06-26
Words count in article: 8.3k | Reading time ≈ 32
mysql基础下承接上文:https://jasonxqh.github.io/2020/05/16/Mysql%E5%9F%BA%E7%A1%80/ Stored ProdedureWhat are Stored Procedures假设我们在开发一个应用,应用中有一个数据库。那么我们在哪里写SQ ...
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PostgreSql基础

Posted on 2020-06-26
Words count in article: 3.9k | Reading time ≈ 17
PostgreSql基础学习视频: https://www.youtube.com/watch?v=FFo8pH-kfQ8&list=PLwvrYc43l1MxAEOI_KwGe8l42uJxMoKeS&index=6 首先我们下载Postgresql11 GUI Clients ...
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拓扑排序

Posted on 2020-06-24 | In 图
Words count in article: 2.5k | Reading time ≈ 11
拓扑排序​ —个无环的有向图称为有向无环图 (DirectedAcycline Graph, DAG)。$11$ ​ 有向无环图是描述—个工程、 计划、 生产、 系统等流程的有效工具。 —个大工程可分为若干个子工程(活动), 活动之间通常有—定的约束, 例如先做什么活动, 什么活动完成后 ...
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图与贪心算法

Posted on 2020-06-21 | In 图
Words count in article: 6.3k | Reading time ≈ 28
图与贪心算法最短路径:Dijkstra算法给定有向图带权图 G= (V, E), 其中每条边的权是非负实数。此外,给定V中的—个顶点,称为源点。现在要计算从源点到所有其他各顶点的最短路径长度, 这里路径长度指路上各边的权之和。 如何求其他各顶点的最短路径呢? 1->2 的最短路径为2 1- ...
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