go main

main.go 源码

// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials  : https://learngoprogramming.com
// In-person training  : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus

package main

import (
	"fmt"

	s "github.com/inancgumus/prettyslice"
)

func main() {
	// #1: received the raining probabilities
	data := []float64{10, 25, 30, 50}

	// #2: received new data
	// newData := []float64{80, 90}
	// for i := 0; i < len(newData); i++ {
	// 	data[i] = newData[i]
	// }

	// #3: use copy
	// copy(data, []float64{99, 100})

	// #4: received more data than the original
	// copy(data, []float64{10, 5, 15, 0, 20})

	// #5: returns the # of copied elements
	// n := copy(data, []float64{10, 5, 15, 0, 20})
	// fmt.Printf("%d probabilities copied.\n", n)

	// #6: (sometimes) use append instead of copy
	// data = append(data[:0], []float64{10, 5, 15, 0, 20}...)

	// #7: clone a slice using copy
	// saved := make([]float64, len(data))
	// copy(saved, data)

	// #9: clone a slice using append nil (I prefer this)
	// saved := append([]float64(nil), data...)

	// data[0] = 0 // #8

	// s.Show("Probabilities (saved)", saved) // #7

	// #1: print the probabilities
	s.Show("Probabilities (data)", data)

	fmt.Printf("Is it gonna rain? %.f%% chance.\n",
		(data[0]+data[1]+data[2]+data[3])/
			float64(len(data)))
}

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