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https://github.com/superpaintman/the-evolution-of-a-go-programmer
The Evolution of a Go Programmer
https://github.com/superpaintman/the-evolution-of-a-go-programmer
developer-roadmap go go-roadmap golang roadmap
Last synced: 2 days ago
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The Evolution of a Go Programmer
- Host: GitHub
- URL: https://github.com/superpaintman/the-evolution-of-a-go-programmer
- Owner: SuperPaintman
- Created: 2020-02-09T23:36:02.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2024-06-14T07:32:27.000Z (6 months ago)
- Last Synced: 2024-12-13T03:00:30.212Z (9 days ago)
- Topics: developer-roadmap, go, go-roadmap, golang, roadmap
- Language: Go
- Homepage:
- Size: 3.91 KB
- Stars: 1,311
- Watchers: 16
- Forks: 61
- Open Issues: 11
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# The Evolution of a Go Programmer
## Junior Go programmer
```go
package fac
func Factorial(n int) int {
res := 1
for i := 1; i <= n; i++ {
res *= i
}
return res
}
```
## Functional Go programmer
```go
package fac
func Factorial(n int) int {
if n == 0 {
return 1
} else {
return Factorial(n - 1) * n
}
}
```
## Generic Go programmer
```go
package fac
func Factorial(n interface{}) interface{} {
v, valid := n.(int)
if !valid {
return 0
}
res := 1
for i := 1; i <= v; i++ {
res *= i
}
return res
}
```
## Multithread optimized Go programmer
```go
package fac
import "sync"
func Factorial(n int) int {
var (
left, right = 1, 1
wg sync.WaitGroup
)
wg.Add(2)
pivot := n / 2
go func() {
for i := 1; i < pivot; i++ {
left *= i
}
wg.Done()
}()
go func() {
for i := pivot; i <= n; i++ {
right *= i
}
wg.Done()
}()
wg.Wait()
return left * right
}
```
## Discovered Go patterns
```go
package fac
func Factorial(n int) <-chan int {
ch := make(chan int)
go func() {
prev := 1
for i := 1; i <= n; i++ {
v := prev * i
ch <- v
prev = v
}
close(ch)
}()
return ch
}
```
## Fix Go weaknesses with mature solutions
```go
package fac
/**
* @see https://en.wikipedia.org/wiki/Factorial
*/
type IFactorial interface {
CalculateFactorial() int
}
// FactorialImpl implements IFactorial.
var _ IFactorial = (*FactorialImpl)(nil)
/**
* Used to find factorial of the n.
*/
type FactorialImpl struct {
/**
* The n.
*/
n int
}
/**
* Constructor of the FactorialImpl.
*
* @param n the n.
*/
func NewFactorial(n int) *FactorialImpl {
return &FactorialImpl{
n: n,
}
}
/**
* Gets the n to use in factorial function.
*
* @return int.
*/
func (this *FactorialImpl) GetN() int {
return this.n
}
/**
* Sets the n to use in factorial function.
*
* @param n the n.
* @return void.
*/
func (this *FactorialImpl) SetN(n int) {
this.n = n
}
/**
* Returns factorial of the n.
*
* @todo remove "if" statement. Maybe we should use a factory or somthing?
*
* @return int.
*/
func (this *FactorialImpl) CalculateFactorial() int {
if this.n == 0 {
return 1
}
n := this.n
this.n = this.n - 1
return this.CalculateFactorial() * n
}
```
## Senior Go programmer
```go
package fac
// Factorial returns n!.
func Factorial(n int) int {
res := 1
for i := 1; i <= n; i++ {
res *= i
}
return res
}
```
## Rob Pike
```text
package fac
// Factorial returns n!.
func Factorial(n int) int {
res := 1
for i := 1; i <= n; i++ {
res *= i
}
return res
}
```
> Tribute to the Iavor Diatchki's original page "[The Evolution of a Programmer](https://www.ariel.com.au/jokes/The_Evolution_of_a_Programmer.html)".