This repo contains my notes on work with Go and computer systems

• Language Specification

  • Syntax
    • Variables: Zero value concept | Initialization | Const
    • Constant: Initialization | iota
    • Conversions: Conversion
    • Struct: Declare_Initialize | Name And Anonymous type Field | Field Function| Iterate Field Name And Value | Selector and Promoted | Method Set
    • Struct Tags: Wiki | Code | Tag-Doc
    • Pointer:
      • Passing by value | Escape analysis | Stack space
    • Function: Initialization | argument | multiple returns | named return
    • Build-in types: Built-in types
    • statement: statement | if else | for | switch | select | go
  • Data Structures
    • Enum: Enum
    • Array: CPU Cache | TLB | Initialization | Iteration | Type array | Contiguous memory allocation
    • Slice: Initialization | Length vs Capacity | Reference Type | Appending | Slice of Slice | Map | Reduce | Filter | Include | All|Any
    • Map: Initialization | Iteration | Deleting | Finding | Restriction
    • Channel: Declare | Iteration | Exit | send statements |receive operations
  • Decoupling
    • Method:
      • Value and Pointer Receiver Call | wiki
      • Value and Pointer Semantics
      • Methods are just functions | Function variable
      • closures
    • Interface:
      • Declaring |Type assertions| Concrete type vs Interface type| Polymorphic function
    • Embedding:
      • Declaring fields, NOT Embedding
      • Embedding type | Inner type promotion
      • Embedded type and Interface
      • Outer and inner type implementing the same Interface
    • Exporting:
      • Exported identifier
      • Accessing a value of an unexported identifier
      • Unexported fields from an exported struct
  • Dependency management Go Modules
  • Error Handling
    • Default error values
    • Error variables | best practices
    • Type as context
    • Wrapping Errors
  • Context
    • Store and retrieve values from a context
    • WithCancel
    • WithDeadline
    • WithTimeout

• Concurrency LearnConcurrency

  • Goroutine
    • asynchronous network IO
  • Channel
    • Guideline
    • ping_pong
    • multiplexing
    • waitgroup
    • mutex
    • worker_pool
    • Select

• Diagnostics Profiling

  • Diagnostics Diagnostics
  • Profiling code
  • Stack Trace: Review
  • GoLand Debug: GoLand Debug | blog

• Testing

  • Testing:
    • Basic Unit Test
    • Web Server
    • Mock | Mock Server
  • Fuzzing
    • Guideline

• Design Pattern Design Patterns | javatpoint

  • SOLID: SOLID
  • Creational
    • Simple Factory: wiki | code | best practices
    • *Abstract factory: wiki | code | best practices
    • *Builder: wiki | code1 | code2 | best practices orm query build | best practices es query build
    • Factory method: wiki | code | best practices
    • *Object Pool Pattern: wiki | code | best practices bilibili redis pool
    • *Prototype: wiki | code | best practices
    • *Singleton: wiki | code | best practices
  • Structual
    • Adapter: wiki | code | best practices
    • *Bridge: wiki | code | best practices
    • Composite: wiki | code | best practices
    • *Decorator: wiki | code | best practices
    • Facade: wiki | code | best practices
    • Flyweight: todowiki | code | best practices
    • Proxy (network proxy): wiki | code | best practices
  • Behavioral
    • *Chain of responsibility: wiki | code | best practices
    • Command: todo wiki | code | best practices
    • *Interpreter: todowiki | code | best practices
    • *Iterator: wiki | code | best practices
    • Mediator: todowiki | code | best practices
    • Memento: todowiki | code | best practices
    • Observer: todowiki | code | best practices
    • State: todowiki | code | best practices
    • *Strategy: wiki | code | best practices
    • Template method : todowiki | code | best practices
    • Visitor: todowiki | code | best practices
  • Composition: Guideline
    • Conversion:
      • Interface Conversions | Type Assertion
      • Runtime Type Assertion
        Algorithms Algorithms
  • Data Structures
    • Binary Search Tree | (wiki) | (mit)
    • Binary Tree | (wiki)
    • Graph(wiki)
    • Hash Tables | (wiki)
    • Linked List | (wiki)
      • Singly Linked List | (wiki)
      • Doubly linked list | (wiki)
    • Matrix | (wiki)
    • Max Heap | (wiki)
    • Min Heap | (wiki)
    • Priority Queue | (wiki)
    • Queue | (wiki)
    • Stack | (wiki)
  • Graph algorithms
    • Searching:
      • Depth First Search | (wiki)
      • Breadth First Search | (wiki)
  • shortest path:
    • Dijkstra | (wiki)
  • Sorting:
    • Topological Sort | (wiki)
  • Maths algorithms
    • Binary GCD algorithm | (wiki)
    • Closest pairs | (wiki)
    • FastPower | (wiki)
    • Fibonacci | (wiki)
    • Fisher-Yates Shuffle-yates | (wiki)
    • Erastothenes Sieve | (wiki)
    • Extented GCD algorithm | (wiki)
    • Karatsuba's Multiplication | (wiki)
    • Newton's Squarenewton-sqrt | (wiki)
    • Permutations Count
    • Strassen's matrixstrassen | (wiki)
  • Sorting algorithms
    • Bubble Sort | (wiki)
    • Heap Sort | (mit notes) | (wiki)
    • Quick Sort | (wiki)
    • Merge Sort | (mit notes) | (wiki)
    • Insertion Sort(mit notes) | (wiki)
    • Shell Sort | (wiki)
    • Selection Sort | (wiki)
  • Searching algorithms
    • Binary Search | wiki

• Crypto

  • Hashing wiki | MIT
    • md5, wiki | code
    • sha1, wiki |code
    • sha256, wiki |code
    • sha512, wiki |code
    • hmac, wiki |code
    • bcrypt, wiki |code
  • Encryption or Ciphers MIT
    • aes, code
    • cipher, code
    • des, code
    • rc4, code
    • rsa, code
  • Encoding
    • base64, code

• databases

  • PostgreSQL
  • MongoDB
  • MySQL
  • redis

• Awesome Go

  • bazel_cpp
  • bazel go
  • config
  • beego
  • go-redis
  • freecache | localcache |best practices
  • gorm
  • iris
  • kafkaSarama
  • mapstructure
  • grpc
  • grpc mock
  • zipkin

• Docs

  • elasticsearch
  • kafka
  • rabbitmq

• Interview

  • defer的顺序，先进后出， 即压栈的顺序
  • defer与panic的运行，先defer, 后panic
  • range, key, value, 注意key , value地址都是固定的， value才变
  • new(), make()区别， new返回pointer, 一般struct, make 返回type, 一般make slice, map, channel
  • append(), 能传入pointer吗， 不能
  • go run order,
  • 全局变量能用short declaration吗， 不能
  • 传value和传pointer的区别是？ 传value创建副本， 传pointer就是传本身
  • str := "hello", str[1] = 'a' 能修改吗， 不能， 因为"hello"是常量
  • ...int, 可变函数
  • x, y := f(), 单赋值时， 不可以赋值给已经赋值的， 多赋值时， 可赋值给已经赋值的
  • string 类型能赋值为nil吗， 不能
  • slice， slice时共享底层内存 ,
  • if else, 块作用域，是整个if else
  • map range 是无序的吗？ 是
  • iota, 常量计数， iota 在 const 关键字出现时将被重置为0，const中每新增一行常量声明将使 iota 计数一次
  • map[string]*Math{"foo": &Math{2, 3}}, value类型是pointer才可以m["foo"].x
  • slice能==比较吗？不能
  • range slice, 循环次数在循环开始前就已经确定，循环内改变切片的长度，不影响循环次数
  • 给nil channel发送or接收数据， 会永久阻塞
  • 给close channel发送数据， 会panic
  • 给close channel接收数据, 如果无数据则返回0
  • panic, nil解析， index out of range, panic()
  • receive only channel 不能 close，直接编译错误。但 send only channel 是可以被正常 close 的
  • 指针不支持索引
  • Go 语言中，大括号不能放在单独的一行, 除非是code block