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"
"strings"
)
func main() {
// this will split the following string by spaces
// and then it will put it inside words variable
// as a slice of strings
words := strings.Fields(
"lazy cat jumps again and again and again",
)
// 1 2 3 4 5 6 7 8
// --------------------------------
// #1st way:
// --------------------------------
// for j := 0; j < len(words); j++ {
// fmt.Printf("#%-2d: %q\n", j+1, words[j])
// }
// --------------------------------
// #2nd way (best):
// --------------------------------
for i, v := range words {
fmt.Printf("#%-2d: %q\n", i+1, v)
}
// --------------------------------
// #3rd way (reuse mechanism):
// --------------------------------
// var (
// i int
// v string
// )
// for i, v = range words {
// fmt.Printf("#%-2d: %q\n", i+1, v)
// }
// fmt.Printf("Last value of i and v %d %q\n", i, v)
}
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