golangbot_tutorial

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golangbot_tutorial [2019/08/25 09:23] – [Introduction and Installation] rpjdaygolangbot_tutorial [2019/08/27 10:52] (current) – [Misc] rpjday
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 The primary focus of Golang is to make the development of highly available and scalable web apps simple and easy. The primary focus of Golang is to make the development of highly available and scalable web apps simple and easy.
 +
 ===== Misc ===== ===== Misc =====
  
 +  * "_" is the "blank identifier"
   * Concurrency   * Concurrency
   * Compiled   * Compiled
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   * Debuggers?   * Debuggers?
   * Code analyzers?   * Code analyzers?
 +  * Install Visual Studio (https://code.visualstudio.com/docs/setup/linux)
  
 ===== Introduction ===== ===== Introduction =====
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 ==== Introduction and Installation ==== ==== Introduction and Installation ====
  
 +Advantages of Go:
 +
 +  * Simple syntax(?)
 +  * Fast compilation
 +  * Static linking
 +  * Concurrency (goroutines and channels)
 +  * Garbage collection
 +  * Simple language specification
 +  * Tooling
 +    * ''/usr/bin/gofmt''  (golang-bin package)
 +    * ''/usr/bin/golint'' (golint package)
 +    * ''go help vet''
 +    * ''go help tool''
 +
 +Used as the basis for Docker and Kubernetes.
 +
 +Third-party tooling, IDEs, etc.
 ==== Hello World ==== ==== Hello World ====
  
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 ==== Variables ==== ==== Variables ====
- 
-  * "zero value" for different variable types 
-  * inferred variable type: 
-<code> 
-var age [int] = 29 
-</code> 
-  * multiple variable declaration: 
-<code> 
-var width, height [int] = 100, 50 
-</code> 
  
 ==== Types ==== ==== Types ====
  
-Go does not allow automatic type promotion or conversion -- "type conversion." +  * Go is strict about explicit typing.
- +
-<code> +
-bool (&&, ||) +
-string +
- +
-int8  int16  int32  int64 +
-int (32 or 64 depending) +
- +
-uint8 uint16 uint32 uint64 +
-uint (32 or 64 depending) +
- +
-uintptr +
- +
-float32 float64 +
-complex64 complex128 +
- +
-byte // alias for uint8 +
-rune // alias for int32 +
-</code> +
- +
-''%T'' printf format specifier prints the type of something.+
  
 ==== Constants ==== ==== Constants ====
  
-<code> +  * Value must be known at compile time 
-const i = 42 +  * Not sure what it means that "const" things have a "default" type until used 
-</code> +  * What does it mean that something is "untyped"?
- +
-  * Value assigned to ''const'' must be known at compile time; cannot require any function execution. +
-  * Untyped constants have a //default// type associated with them and they supply it if and only if a line of code demands it. You can always created a typed constant if you want: +
-<code> +
-const typedhello string = "Hello World" +
-</code>+
  
 ===== Functions and Packages ===== ===== Functions and Packages =====
  
 ==== Functions ==== ==== Functions ====
- 
-  * return type //follows// parameter list 
  
 ==== Packages ==== ==== Packages ====
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 ===== First Class Functions ===== ===== First Class Functions =====
 +
 +===== Reflection =====
 +
 +===== File Handling =====
 +
 +==== Reading files ====
 +
 +==== Writing files ====
  • golangbot_tutorial.1566725022.txt.gz
  • Last modified: 2019/08/25 09:23
  • by rpjday