試圖自學(xué)，發(fā)現(xiàn)很難找到例子，我的大腦已經(jīng)陷入困境。非常不確定3和4，需要幫助使5正常工作。package mainimport "fmt"func main () { println("0. Array:") var a = [...]int{4,5,6,7,8,9} //assign fmt.Println(a,"\n") println("1. Slice:") var as []int as = a[:] //assign fmt.Println(as,"\n") println("2. Array of arrays:") var b [4][len(a)]int for i:= range b { //assign b[i]=a } fmt.Println(b,"\n") println("3. Array of slices:") var d [len(b)][]int for i:= range b { // assign d[i] = b[i][:] //does this really work? } fmt.Println(d,"\n") println("4. Slice of arrays:") var c [][len(a)]int c = b[:][:] // assign, does this really work? fmt.Println(c,"\n") println("5. Slice of slices:") var e [][]int// e = c // ??? fmt.Println(e,"\n")}
2 回答
慕運維8079593
TA貢獻1876條經(jīng)驗 獲得超5個贊
答案是“這真的有用嗎？” 取決于您的期望。在http://play.golang.org/p/7Z5hKioTI_中考慮此示例
package main
import "fmt"
func main() {
fmt.Println("0. Array:")
var a = [...]int{4, 5, 6, 7, 8, 9} //assign
fmt.Println(a, "\n")
fmt.Println("1. Slice:")
var as []int
as = a[:] //assign
fmt.Println(as, "\n")
fmt.Println("new slice:")
ns := make([]int, len(a))
copy(ns, a[:])
fmt.Print(ns, "\n\n")
fmt.Println("modifying array...")
a[0] = 10
fmt.Print("array is now:\n", a, "\n\n")
fmt.Print("slice is now:\n", as, "\n\n")
fmt.Print("new slice is still:\n", ns, "\n")
}
它顯示了切片如何具有基礎(chǔ)數(shù)組，以及OP中的示例使用相同的基礎(chǔ)數(shù)組來構(gòu)成切片。如果要使切片具有獨立的內(nèi)容，則必須制作新的切片并復(fù)制數(shù)據(jù)。（或者有附加的技巧...）
另外請注意，println將數(shù)據(jù)發(fā)送到stderr而不是stdout，并且將某些數(shù)據(jù)類型的格式設(shè)置為與fmt.Println不同。為避免混淆，最好保持使用fmt.Println的習(xí)慣。
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