我有兩片：a []string, b []string. b包含所有相同的元素加上a一個額外的元素。索引：值彼此不匹配，但值匹配，否則我可以執(zhí)行類似 和strings.Join()的操作strings.Replace()。這就是我正在嘗試的。package mainimport ( "fmt" "github.com/google/go-cmp/cmp")func compare(start_keys []string, end_keys []string) string { match := make([]string, len(start_keys)) q := 0 for i := 0; i < len(end_keys); i++ { for z := 0; z < len(start_keys); z++ { if end_keys[i] == start_keys[z] { match[q] = start_keys[z] q++ } } } // now matches known for i := 0; i < len(end_keys); i++ { n := end_keys[i] // current element to compare to s := nip(match, n) // compare result if s == true { // if no matches, print a := end_keys[i] fmt.Println("Not present: ", a) } i++ } fmt.Println("List=", match) return "error"}func nip(matches []string, element string) bool { zyx := 0 for n := 0; n < len(matches); n++ { if matches[n] == element { n++ zyx++ } else if matches[n] != element { n++ } } if zyx == 0 { return true } return false}func main() { start_keys := []string{"a", "b", "c", "d", "e", "f", "g"} end_keys := []string{"a", "1sdsdfsdfsdsdf", "c", "d", "e", "f", "g", "b"} x := compare(start_keys, end_keys) x = x foo := cmp.Diff(start_keys, end_keys) fmt.Println(foo)}matches[]符合我的預期，但nip()在某些匹配項上返回 true，而不是針對唯一值1sdsdfsdfsdsdfaa :::: aca :::: cd :::: cf :::: cb :::: cNot present: cea :::: ed :::: ef :::: eb :::: eNot present: ega :::: gd :::: gf :::: gb :::: g
2 回答
HUWWW
TA貢獻1874條經(jīng)驗 獲得超12個贊
比較兩個切片是否缺少元素
我有兩片：a []string, b []string. b包含所有相同的元素加上a一個額外的元素。
例如，
package main
import (
"fmt"
)
func missing(a, b []string) string {
ma := make(map[string]bool, len(a))
for _, ka := range a {
ma[ka] = true
}
for _, kb := range b {
if !ma[kb] {
return kb
}
}
return ""
}
func main() {
a := []string{"a", "b", "c", "d", "e", "f", "g"}
b := []string{"a", "1sdsdfsdfsdsdf", "c", "d", "e", "f", "g", "b"}
fmt.Println(missing(a, b))
}
輸出：
1sdsdfsdfsdsdf
浮云間
TA貢獻1829條經(jīng)驗 獲得超4個贊
/*
An example of how to find the difference between two slices.
This example uses empty struct (0 bytes) for map values.
*/
package main
import (
"fmt"
)
// empty struct (0 bytes)
type void struct{}
// missing compares two slices and returns slice of differences
func missing(a, b []string) []string {
// create map with length of the 'a' slice
ma := make(map[string]void, len(a))
diffs := []string{}
// Convert first slice to map with empty struct (0 bytes)
for _, ka := range a {
ma[ka] = void{}
}
// find missing values in a
for _, kb := range b {
if _, ok := ma[kb]; !ok {
diffs = append(diffs, kb)
}
}
return diffs
}
func main() {
a := []string{"a", "b", "c", "d", "e", "f", "g"}
b := []string{"a", "c", "d", "e", "f", "g", "b"}
c := []string{"a", "b", "x", "y", "z"}
fmt.Println("a and b diffs", missing(a, b))
fmt.Println("a and c diffs", missing(a, c))
}
輸出
a and b diffs []
a and c diffs [x y z]
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