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MIT Licensed | Copyright © 2020 Marco
- + diff --git a/service-worker.js b/service-worker.js index f572970..31a98c8 100644 --- a/service-worker.js +++ b/service-worker.js @@ -27,7 +27,7 @@ self.addEventListener('message', (event) => { self.__precacheManifest = [ { "url": "404.html", - "revision": "0bc59f6271a35919e8fd4a3c027c8a55" + "revision": "4b49a7a628f51024ae26e3716431f6aa" }, { "url": "architecture.png", @@ -78,8 +78,8 @@ self.__precacheManifest = [ "revision": "ec3ac35925e27c05249678dae39f399e" }, { - "url": "assets/js/19.1f71a0e2.js", - "revision": "e66eb3b1e4c4cb6a3979639feabef19e" + "url": "assets/js/19.2aa38084.js", + "revision": "d569ff51a63f3059ebdeb41ad83b584d" }, { "url": "assets/js/20.0a44368a.js", @@ -102,8 +102,8 @@ self.__precacheManifest = [ "revision": "56df2757105168d6989f41af98dd0f49" }, { - "url": "assets/js/25.e734f04f.js", - "revision": "daa557ff7488ec00d5fd9c84f6b64358" + "url": "assets/js/25.9165907b.js", + "revision": "cbdb1a9c20e0c65e46931ef7c746c828" }, { "url": "assets/js/26.0c6371a4.js", @@ -198,8 +198,8 @@ self.__precacheManifest = [ "revision": "c1f319c99acdf47265e5e17c04b1c431" }, { - "url": "assets/js/app.58b94fd8.js", - "revision": "4e1107a31cafade314c8427182da0f02" + "url": "assets/js/app.317b3400.js", + "revision": "d30ffa44ce4db023da63a84aeeb60048" }, { "url": "assets/js/vendors~docsearch.87ae9561.js", @@ -241,6 +241,14 @@ self.__precacheManifest = [ "url": "db/mysql/mysql-07.jpg", "revision": "416a1b17f4bc9055db554500393f6e2c" }, + { + "url": "db/postgresql/postgresql-01.png", + "revision": "67635cd276286d0b14aa3917466ec08f" + }, + { + "url": "db/postgresql/postgresql-02.png", + "revision": "ac0a50769fd3d8ee4cec55d9a8a71ce2" + }, { "url": "hero.png", "revision": "a77336361b60cc149e9ace8b8b4b0e0f" @@ -299,7 +307,7 @@ self.__precacheManifest = [ }, { "url": "index.html", - "revision": "34cbc30053164906b6aeaa459bbfe5c8" + "revision": "465af8e5411f931a505507612ba027b6" }, { "url": "line-numbers-desktop.png", @@ -383,103 +391,103 @@ self.__precacheManifest = [ }, { "url": "zh/db/clickhouse.html", - "revision": "cacefa1586ffcc3eba61a471a81dbcd3" + "revision": "0b719590fff4f7f9a313542fe97cbd2a" }, { "url": "zh/db/hbase.html", - "revision": "8fb68528b4e984da9482d1b035dfc432" + "revision": "70aa429513f9de8477590f63687295fd" }, { "url": "zh/db/index.html", - "revision": "d3ca30e9753d5c52935731adac1d46ca" + "revision": "1313119f0bc34f206e0e8558042c00ca" }, { "url": "zh/db/mongodb.html", - "revision": "05e8896fac09defd6ee260a6bc3c54e0" + "revision": "6abc2468d6089a7fcd9d779f21c42bc4" }, { "url": "zh/db/mysql.html", - "revision": "f21f91a9da7c988154d71f4da66739ec" + "revision": "733e55d8ee6e551259902f6ca983ccaa" }, { "url": "zh/db/neo4j.html", - "revision": "eecd96852e59f5432d658279415ba3e7" + "revision": "28a0e9e42d7f1e3bd0f524fcc95ad34b" }, { "url": "zh/db/postgreSQL.html", - "revision": "a2747e2dfe7be1d6844f0ddba3c32edc" + "revision": "1e052f09686d7d4422c833ccca3bb377" }, { "url": "zh/db/redis.html", - "revision": "81ba66d1177193625a855059fddea266" + "revision": "e1b318ca2bc8176baf6789e16ae3df26" }, { "url": "zh/devops/index.html", - "revision": "7eb109df22de9c8701f57d911cc1bc84" + "revision": "316c5fc5e74f9d05e47afe3918524cd1" }, { "url": "zh/distributed/index.html", - "revision": "ff3e5c5440f670e5496c708c98136cd9" + "revision": "fe09771504970e3f4db9d46447107df4" }, { "url": "zh/guide/index.html", - "revision": "f6a36567f90e2c433a53bbd30d0e5d62" + "revision": "2249f3a2bc9937f71ada603299dbeee7" }, { "url": "zh/index.html", - "revision": "83b3d8b931dfe27d1f64abd53a62a8ee" + "revision": "ccdd9d59a4793605d90d7258c1446599" }, { "url": "zh/os/coroutines.html", - "revision": "7610b1e9024beb045c0b379ebebf4813" + "revision": "49c674a49b5f49eed0fb7d0888a43058" }, { "url": "zh/os/cpu.html", - "revision": "d3b93d8d3c154cc6636ba39375f5bf79" + "revision": "39d7ef8a295621a637f4569c55338de8" }, { "url": "zh/os/index.html", - "revision": "b0c0c48566d4c7b4ba1b4f296daf1c9e" + "revision": "3db5cf3ff66ede35418e431285ad4211" }, { "url": "zh/os/io.html", - "revision": "946e3bd876f6f9d834e370ee730724cc" + "revision": "f07bf4849a35274a59a708781d25cff7" }, { "url": "zh/os/linux.html", - "revision": "7c1181da14d3a8ff39a9ec26dfc5b177" + "revision": "1951a3d409aa5883ea4633ee63b04b0a" }, { "url": "zh/os/process.html", - "revision": "ffb2a7e62c92eb3ea914d02363188d37" + "revision": "0975225c059c8e742797ee1c28d07dd4" }, { "url": "zh/os/thread.html", - "revision": "800cba2b1d4ccfcf5da6b7e757865a4c" + "revision": "f4e7160861559b43c52241264df98f06" }, { "url": "zh/program/c.html", - "revision": "1ac1075131d06c2b7dddc9558634195c" + "revision": "0936a914faabe5a63e0259caa89110d5" }, { "url": "zh/program/golang.html", - "revision": "93d4f57180c3ac37762046d38fcc5b78" + "revision": "6661e04edebf9636fbc1addc7da8dd84" }, { "url": "zh/program/index.html", - "revision": "482d5844e17e798b842c2d6ebb1bc2ca" + "revision": "3bc8f310ed7623f28b714a46d483c986" }, { "url": "zh/program/javascript.html", - "revision": "931b3a3b15cf24e2b4cb4c5c28c6f4e6" + "revision": "497e6f99fbe1bba3d9949b3ca7ab9bb9" }, { "url": "zh/program/php.html", - "revision": "11750cf08ee5f39c37047ece72e583d7" + "revision": "cd812ebe292061b854804f9c981741e9" }, { "url": "zh/program/python.html", - "revision": "87347787ffa0cd62306e4e09ba49bc66" + "revision": "ed19a0f38f5e63c3c9d7c8a0a6b917bc" } ].concat(self.__precacheManifest || []); workbox.precaching.precacheAndRoute(self.__precacheManifest, {}); diff --git a/zh/db/clickhouse.html b/zh/db/clickhouse.html index 3caf863..ff1b744 100644 --- a/zh/db/clickhouse.html +++ b/zh/db/clickhouse.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/db/hbase.html b/zh/db/hbase.html index bb9680e..d4ebc56 100644 --- a/zh/db/hbase.html +++ b/zh/db/hbase.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/db/index.html b/zh/db/index.html index 30413e2..b73265d 100644 --- a/zh/db/index.html +++ b/zh/db/index.html @@ -16,7 +16,7 @@ - + @@ -112,7 +112,7 @@ English GitHub -

# 数据库 🔎

数据库不是凭空产生的，它们是为了解决实际使用中提出的问题，在RDBMS（关系数据库管理系统）出现的环境中，数据库插叙你的灵活性比灵活的模式更重要

# 数据库概述

本节包含了9种数据库的信息

MongoDB counchDB Riak Redis PostgreSQL Neo4J HBase Mysql Clickhouse
类型 文档 文档 键-值 键-值 关系 图 列 关系 列
数据类型 有类型 有类型 Blob 半类型 预定义且有类型 无类型 预定义且有类型 ❌ ❌
数据关系 无 无 自由定义的（链接） 无 预定义 预定义的（边） 无 ❌ ❌
标准对象 JSON JSON 文本 字符串 表 哈希 列 ❌ ❌
编写语言 C++ Erlang Erlang C/C++ C JAVA JAVA ❌ ❌
接口协议 TCP上自定义 HTTP HTTP-Protobuf TCP上的简单文本 TCP上自定义 HTTP Thrift-HTTP ❌ ❌
HTTP/REST ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌
二级索引 ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌
版本化 ❌ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌
Build Load mongoimport Bulk Doc API 否 否 COPY命令 否 否 ❌ ❌
非常大的文件 GridFS 附件 Luwak(已弃用) 无 BLOB 无 无 ❌ ❌
自由定义的查询 命令mapreduce 临时视图 弱支持Lucene 命令 SQL 图遍历，Cypher，搜索 弱 ❌ ❌
mapreduce JavaScript JavaScript JavaScript，Erlang 无 无 无 Hadoop ❌ ❌
伸缩性 数据中心 数据中心 数据中心 集群（主-从） 集群（通过一些扩展） 集群（通过HA） 数据中心 ❌ ❌
耐久性 写前日志安全模式 只在崩溃时 写入法定数则耐久 仅追加的日志 ACID ACID 写前日志 ❌ ❌
请求压缩 否 文件重写 否 快照 否 否 否 ❌ ❌
复制 主-从（通过复集） 主-主 基于对等主-主 主-从 主-从 主-从（在企业版中） 主-从 ❌ ❌
并发 写锁 无锁的MVCC 向量锁 无 表/行写锁 写锁 每行一段 ❌ ❌
分片 是 锁（通过BigCouch过滤器） 是 插件（客户端） 扩展（PL/Proxy） 否 通过HDFS ❌ ❌
事务 无 无 无 多操作队列 ACID ACID 是 ❌ ❌
触发器 无 更新验证或改变API 提交前后 无 是 事物事件处理程序 无 ❌ ❌
安全性 用户 用户 无 口令 用户/群 无 Kerberos,通过Hadoop的安全性 ❌ ❌
一主机多实例 ✅ ✅ ❌ ❌ ✅ ❌ ❌ ❌ ❌
主要区别 容易查询大量数据 耐久的可嵌入的集群 高可用性 非常非常快 最好的OSS RDBMS模型 灵活的图 规模非常大，Hadoop基础设施 ❌ ❌
不足 嵌入能力 查询能力 查询能力 负责数据 分布式高可用性 Blob或TB级数据 灵活增长查询能力 ❌ ❌

# 附录

- +

# 数据库 🔎

数据库不是凭空产生的，它们是为了解决实际使用中提出的问题，在RDBMS（关系数据库管理系统）出现的环境中，数据库插叙你的灵活性比灵活的模式更重要

# 数据库概述

本节包含了9种数据库的信息

MongoDB counchDB Riak Redis PostgreSQL Neo4J HBase Mysql Clickhouse
类型 文档 文档 键-值 键-值 关系 图 列 关系 列
数据类型 有类型 有类型 Blob 半类型 预定义且有类型 无类型 预定义且有类型 ❌ ❌
数据关系 无 无 自由定义的（链接） 无 预定义 预定义的（边） 无 ❌ ❌
标准对象 JSON JSON 文本 字符串 表 哈希 列 ❌ ❌
编写语言 C++ Erlang Erlang C/C++ C JAVA JAVA ❌ ❌
接口协议 TCP上自定义 HTTP HTTP-Protobuf TCP上的简单文本 TCP上自定义 HTTP Thrift-HTTP ❌ ❌
HTTP/REST ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌
二级索引 ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌
版本化 ❌ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌
Build Load mongoimport Bulk Doc API 否 否 COPY命令 否 否 ❌ ❌
非常大的文件 GridFS 附件 Luwak(已弃用) 无 BLOB 无 无 ❌ ❌
自由定义的查询 命令mapreduce 临时视图 弱支持Lucene 命令 SQL 图遍历，Cypher，搜索 弱 ❌ ❌
mapreduce JavaScript JavaScript JavaScript，Erlang 无 无 无 Hadoop ❌ ❌
伸缩性 数据中心 数据中心 数据中心 集群（主-从） 集群（通过一些扩展） 集群（通过HA） 数据中心 ❌ ❌
耐久性 写前日志安全模式 只在崩溃时 写入法定数则耐久 仅追加的日志 ACID ACID 写前日志 ❌ ❌
请求压缩 否 文件重写 否 快照 否 否 否 ❌ ❌
复制 主-从（通过复集） 主-主 基于对等主-主 主-从 主-从 主-从（在企业版中） 主-从 ❌ ❌
并发 写锁 无锁的MVCC 向量锁 无 表/行写锁 写锁 每行一段 ❌ ❌
分片 是 锁（通过BigCouch过滤器） 是 插件（客户端） 扩展（PL/Proxy） 否 通过HDFS ❌ ❌
事务 无 无 无 多操作队列 ACID ACID 是 ❌ ❌
触发器 无 更新验证或改变API 提交前后 无 是 事物事件处理程序 无 ❌ ❌
安全性 用户 用户 无 口令 用户/群 无 Kerberos,通过Hadoop的安全性 ❌ ❌
一主机多实例 ✅ ✅ ❌ ❌ ✅ ❌ ❌ ❌ ❌
主要区别 容易查询大量数据 耐久的可嵌入的集群 高可用性 非常非常快 最好的OSS RDBMS模型 灵活的图 规模非常大，Hadoop基础设施 ❌ ❌
不足 嵌入能力 查询能力 查询能力 负责数据 分布式高可用性 Blob或TB级数据 灵活增长查询能力 ❌ ❌

# 附录

+ diff --git a/zh/db/mongodb.html b/zh/db/mongodb.html index 04e306d..a027a71 100644 --- a/zh/db/mongodb.html +++ b/zh/db/mongodb.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/db/mysql.html b/zh/db/mysql.html index 872f33b..475e500 100644 --- a/zh/db/mysql.html +++ b/zh/db/mysql.html @@ -16,7 +16,7 @@ - + @@ -141,6 +141,6 @@ →

- + diff --git a/zh/db/neo4j.html b/zh/db/neo4j.html index 24db032..d5f1357 100644 --- a/zh/db/neo4j.html +++ b/zh/db/neo4j.html @@ -16,7 +16,7 @@ - + @@ -117,6 +117,6 @@

- + diff --git a/zh/db/postgreSQL.html b/zh/db/postgreSQL.html index 2922575..26ac5f0 100644 --- a/zh/db/postgreSQL.html +++ b/zh/db/postgreSQL.html @@ -16,7 +16,7 @@ - + @@ -112,7 +112,34 @@ English GitHub -

# PostgreSQL

+

# PostgreSQL

foo
+20世纪70年代初，最初的项目产生于加州大学伯克利分校，叫做交互式图形和检索系统（Interactive Graphincs and Retrieval System）,简称Ingres，在20世纪80年代，推出了一个改进版，post-ingres,简称为Postgres,虽然后面这个项目让伯克利大学中介，但开源社区拿到了源码，并将其改名为PostgreSQL95，后来在1996年更名为PostgreSQL,表示对心的SQL标准的支持，此后就一直用这个名字 +

# 初始化

PostgreSQL不仅支持关系数据库的各种功能，而且还具备类、继承等对象数据库的特征。它是目前功能最强大、特性最丰富和结构最复杂的开源数据库管理系统，其中有些特性甚至连商业数据库都不具备。这个起源于加州大学伯克利分校（UCB）的数据库研究计划，现在已经衍生成一项国际开发项目，并且拥有广泛的用户群。PostgreSQL主要运行在Unix和Linux操作系统上（从8.0版本开始推出了Windows平台上的版本），并且免费开放源代码，用户可以在其官方网站上下载各种安装程序和文档

# 数学关系

关系数据库的名称源于它们包含关系（即表），它们是元组（即行）的集合，元组又将属性映射到原子值，可用的属性通过头部的属性元组来定义，这些属性映射啊都某个域或限制的类型，这是关系结构的要点

# 准备环境

  1. 安装环境，并进入环境
set -ex \
+  && docker run --name pgsql -e POSTGRES_PASSWORD=marco -d postgres:9.6 \
+  && docker exec -it -u postgres pgsql /bin/bash 
+
  1. 创建book数据库
 createdb book # pg套件里自带的命令
+

# 从SQL开始

一个简单的CURD

CREATE TABLE students (id SERIAL PRIMARY KEY,name VARCHAR(10) UNIQUE,hobby VARCHAR(255)); 
+INSERT INTO students(name,hobby) VALUES ('marco','foo'),('jack','bar'); 
+UPDATE students SET hobby="bar" WHERE name='marco' ; 
+DELETE FROM students WHERE name='jack';
+SELECT * FROM students;
+

获得结果集

book=# SELECT * FROM students;
+ id | name  | hobby
+----+-------+-------
+  1 | marco | bar
+(1 row)
+

关于外键

CREATE TABLE class (student_id int REFERENCES "students"("id"), title VARCHAR(10) CHECK(title <> ''),PRIMARY KEY(title,student_id));
+INSERT INTO class(student_id,title) VALUES (1,'boss');
+

查看当前数据库里所有表类似mysql的SHOW TABLES;

book=# \d
+               List of relations
+ Schema |      Name       |   Type   |  Owner
+--------+-----------------+----------+----------
+ public | class           | table    | postgres
+ public | students        | table    | postgres
+ public | students_id_seq | sequence | postgres
+(3 rows)
+
+

# 体系结构

foo

PostgreSQL数据库由连接管理系统（系统控制器）、编译执行系统、存储管理系统、事务系统、系统表五大部分组成，

  • 连接管理系统 接受外部操作对系统的请求，对操作请求进行预处理和分发，起系统逻辑控制作用；
  • 编译执行系统 由查询编译器、查询执行器组成，完成操作请求在数据库中的分析处理和转化工作，最终实现物理存储介质中数据的操作；
  • 存储管理系统 由索引管理器、内存管理器、外存管理器组成，负责存储和管理物理数据，提供对编译查询系统的支持；
  • 事务系统 由事务管理器、日志管理器、并发控制、锁管理器组成，日志管理器和事务管理器完成对操作请求处理的事务一致性支持，锁管理器-和并发控制提供对并发访问数据的一致性支持；
  • 系统表 是PostgreSQL数据库的元信息管理中心，包括数据库对象信息和数据库管理控制信息。系统表管理元数据信息，将PostgreSQL数据库的各个模块有机地连接在一起，形成一个高效的数据管理系统。

# MVCC

← →

- + diff --git a/zh/db/redis.html b/zh/db/redis.html index d8129d5..899b9a6 100644 --- a/zh/db/redis.html +++ b/zh/db/redis.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/devops/index.html b/zh/devops/index.html index 72d5fcd..8686f5e 100644 --- a/zh/devops/index.html +++ b/zh/devops/index.html @@ -16,7 +16,7 @@ - + @@ -113,6 +113,6 @@ GitHub

README.md

- + diff --git a/zh/distributed/index.html b/zh/distributed/index.html index 1fc9140..0ebeaaf 100644 --- a/zh/distributed/index.html +++ b/zh/distributed/index.html @@ -16,7 +16,7 @@ - + @@ -113,6 +113,6 @@ GitHub

README.md

- + diff --git a/zh/guide/index.html b/zh/guide/index.html index 4939eff..880741c 100644 --- a/zh/guide/index.html +++ b/zh/guide/index.html @@ -16,7 +16,7 @@ - + @@ -113,6 +113,6 @@ GitHub

# 要怎样努力，才能成为很厉害的人

foo

我以前啊，和你一样，很想成为一个很厉害很厉害很厉害的人。

喜欢看热血的东西，幻想自己是屠龙的勇士，登塔的先锋，我左手有剑，右手有光，没头没脑的燃烧自己，敌人的骑军来了，我说你们何人堪与之战，我的女人在等我。

后来我现实了一点，我觉得我要成为那种说走就走，说日就日的男人，我梳大背头，流浪在欧洲或者新几内亚的，我拍孩子，拍野兽，拍流浪的雏妓，与罗伯特德尼罗握手，说嘿，我给你写了愤怒的公牛2。

再后来，我觉得我人生的梦想，是在城市中心买上一间顶层公寓，把一整面墙都改造成钢化玻璃，在灯火通明的夜晚，我就要端着酒站在巨大的窗前，看整个城市在呼吸，然后我的朋友叩门，他带来了一打嫩模，我们就玩一些成年人的游戏

现在，我发现龙并不存在，我不会骑马，不会用单反，家住2楼，我能做的，就是把眼前的事儿做好，赚到足够的钱，这样我可以给我的姑娘一个地球仪，然后用飞镖扎它，扎到哪儿，就去哪儿玩。

这样看来，虽然我的想法随着生殖器的发育，始终在变，但那个很厉害很厉害的人，一直离我很远，甚至越来越远。

我心中曾经执剑的少年，此刻也混迹在市井之间。

血似乎都凉了。

我也不是没有惶恐过，是不是我这一生，都不能左手持剑，右手握着罗伯特德尼罗，说这里的嫩模随便你玩但是你他妈别从窗户上掉下去。

这样一看，我逊得不行，我的朋友都是一些凡人，比我还逊，业余生活就是推塔、中单、跪。

我心想，我是不是这辈子都要做一个逊逼，直到我的坟墓上写好墓志铭，我甚至都想好了：

我来，我见，我挂了。

最后我给了自己一个否定的答复，我不要。

我喜欢我的朋友们，喜欢我现在的生活，首先我希望你明白，没有厉害与逊逼得区分，只有血的凉与热，有的人觉得生活就这样吧，我算了，现在没什么不好。

有的人觉得生活这样挺好，但是我还要更好。

这种只要剧情稍微热血一点就会热泪盈眶的傻逼，已经不多了，一刻也不要停留。

所以现在，我和你不一样了，我仍然想成为一个很厉害很厉害很厉害的人，像我们这种剧情稍微热血一点就会热泪盈眶的傻逼，要好好珍惜自己。

很多人坐下来了，跟你说你不行，说你省点儿心吧，说你请静一静。

汹涌的人群就把你这样的少年淹没了，人群散去的时候，你也不见了，你那些承诺，谁也听不见，这个世界对于你，就再不可能有什么更有趣更漂亮的女朋友。

你就失约了，小逼崽子。

这么跟你说。

虽然随着年龄的增长，我趋于现实，不能像你那样分分钟冲动的燃烧，然而我每时每刻都有想做的事，有想达成的目标。

不排除以后的某一年，我会握着罗伯特德尼罗的手，他说这是你写得吗，愤怒的公牛2，只要他还没死。

故事里拳王拉莫塔忍着伤，他举着铁拳，挥汗如雨，要和命运斗争，他说我怎么能失约呢，我是那个要成为很厉害很厉害的拳王拉莫塔！

小伙儿，成为很厉害很厉害的人，最重要的，就是要热血，永远也不要让你的血凉下去，你凉下去了，就再也不能找到一个更有趣更漂亮的女友，你就失约了，于是那天她踏梦而来，就成了一个彻头彻尾的笑话。

当有一天你成为你讨厌的那种人，浑浑噩噩，你走在街上，看见那些更有趣更漂亮的女孩，你会不会想起多年以前，你说我答应你，在一个承诺就是永远的年纪。

读书，交友，美容，都不如你这一腔狗血，滚烫，灼人，你要燃上大半辈子，才对得起你现在说的这些话。

我听闻最美的故事，是公主死去了，屠龙的少年还在燃烧。

火苗再小，你都要反复的点燃。

所谓热血的少年，青涩的爱恋，死亡与梦之约。

这么好的故事。

你可别演砸了。

最后我给你点个人建议：

  1. 读书，读到倦，网上有很多方法，但你从来沉不下心看。
  2. 学习，学到疼，网上有很多方法，但你从来沉不下心看。
  3. 开口说话，冷场也要说话，脸皮薄也要说话，挨打也要说话。
  4. 如果你现在不知道做什么，至少你还可以先从做一个牛逼的学生开始。
  5. 更漂亮更有趣的女孩，五年以后再找。
  6. 承诺是鞭子，不是兴奋剂。
  7. 年纪大了，也不要说什么心如死灰。

改变自己是非常，非常，非常痛苦的，我能看出来你一腔热血的优点，自然知道你孤僻懒散自以为是的缺点，方法很多，不过我不确定你吃不吃得了苦，我和你共勉吧。

在成为最厉害最厉害最厉害的道路上。

完

- + diff --git a/zh/index.html b/zh/index.html index 284bddd..674bed1 100644 --- a/zh/index.html +++ b/zh/index.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@

简洁至上

以 Markdown 为中心的项目结构，以最少的配置帮助你专注于写作。

MIT Licensed | Copyright © 2020-PRESENT Marco
- + diff --git a/zh/os/coroutines.html b/zh/os/coroutines.html index e7ca15a..dec0caa 100644 --- a/zh/os/coroutines.html +++ b/zh/os/coroutines.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/os/cpu.html b/zh/os/cpu.html index 516d7c4..b912f1a 100644 --- a/zh/os/cpu.html +++ b/zh/os/cpu.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/os/index.html b/zh/os/index.html index c1ea73e..85c6abe 100644 --- a/zh/os/index.html +++ b/zh/os/index.html @@ -16,7 +16,7 @@ - + @@ -113,6 +113,6 @@ GitHub

# 操作系统

- + diff --git a/zh/os/io.html b/zh/os/io.html index 59036b6..8e9076e 100644 --- a/zh/os/io.html +++ b/zh/os/io.html @@ -16,7 +16,7 @@ - + @@ -279,6 +279,6 @@ →

- + diff --git a/zh/os/linux.html b/zh/os/linux.html index 1875ad7..f6cebd4 100644 --- a/zh/os/linux.html +++ b/zh/os/linux.html @@ -16,7 +16,7 @@ - + @@ -117,6 +117,6 @@

- + diff --git a/zh/os/process.html b/zh/os/process.html index 293e5d8..f35ae8b 100644 --- a/zh/os/process.html +++ b/zh/os/process.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/os/thread.html b/zh/os/thread.html index 19c413c..e05ec0a 100644 --- a/zh/os/thread.html +++ b/zh/os/thread.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/program/c.html b/zh/program/c.html index a637679..d40b744 100644 --- a/zh/program/c.html +++ b/zh/program/c.html @@ -16,7 +16,7 @@ - + @@ -117,6 +117,6 @@

- + diff --git a/zh/program/golang.html b/zh/program/golang.html index c81687c..8f85cfa 100644 --- a/zh/program/golang.html +++ b/zh/program/golang.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/program/index.html b/zh/program/index.html index f953575..da28819 100644 --- a/zh/program/index.html +++ b/zh/program/index.html @@ -16,7 +16,7 @@ - + @@ -129,6 +129,6 @@ 中间码依赖jvm，而不依赖于平台（操作系统），只要jvm支持中间码，中间就能运行，不同平台的兼容性，就由jvm来解决，开发者可以专注于开发业务逻辑，这解决了编译语言的跨平台问题。

但如果你代码发生了改变，仍然需要再次编译。

# 完全解释

PHP是完全解释，它一次编译都省了，直接由解释器加载源代码，就开始逐行翻译并运行。 那么，调试程序的时候，更改代码就能直接再次运行，不存在编译的步骤，它在跨平台的基础上，又为开发调试提供了便利。 但这不一定是好事，这将导致php每一次运行，都需要先解释，再执行，运行效率上比不上java的直接由jvm运行中间码。

当然，java半编译半解释，虽然通过jvm解决了跨平台问题，但运行效率上，也是比不上编译型语言的，因为编译型语言开发的程序运行时，计算机只需要关注程序本身的流程就好了，但java，jvm也是对计算机资源的一种开销，不过这种开销非常小，几乎可以忽略。

- + diff --git a/zh/program/javascript.html b/zh/program/javascript.html index c2e8217..b8ebdf8 100644 --- a/zh/program/javascript.html +++ b/zh/program/javascript.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- + diff --git a/zh/program/php.html b/zh/program/php.html index f7521ad..11a9e60 100644 --- a/zh/program/php.html +++ b/zh/program/php.html @@ -16,7 +16,7 @@ - + @@ -345,6 +345,6 @@ →

- + diff --git a/zh/program/python.html b/zh/program/python.html index cf4b77a..c620bda 100644 --- a/zh/program/python.html +++ b/zh/program/python.html @@ -16,7 +16,7 @@ - + @@ -121,6 +121,6 @@ →

- +