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56 lines
863 B
56 lines
863 B
/*
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* string functions
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*/
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package helper
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// 求差集
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func Diff(slice1, slice2 []string) []string {
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m := make(map[string]int)
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nn := make([]string, 0)
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inter := Intersect(slice1, slice2)
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for _, v := range inter {
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m[v]++
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}
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for _, value := range slice1 {
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times, _ := m[value]
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if times == 0 {
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nn = append(nn, value)
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}
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}
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return nn
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}
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// 求交集
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func Intersect(slice1, slice2 []string) []string {
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m := make(map[string]int)
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nn := make([]string, 0)
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for _, v := range slice1 {
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m[v]++
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}
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for _, v := range slice2 {
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times, _ := m[v]
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if times == 1 {
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nn = append(nn, v)
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}
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}
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return nn
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}
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// 求并集
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func Union(slice1, slice2 []string) []string {
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m := make(map[string]int)
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for _, v := range slice1 {
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m[v]++
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}
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for _, v := range slice2 {
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times, _ := m[v]
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if times == 0 {
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slice1 = append(slice1, v)
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}
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}
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return slice1
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}
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