游戏,还有社交属性类软件都需要的脏字过滤功能。关于Trie算法 自行百度。
不多说直接撸代码
// Trie.go
// 358860528@qq.com
package comm
import (
"unicode/utf8"
)
/*
脏字过滤库
*/
type Trie struct {
Root *TrieNode
}
type TrieNode struct {
Children map[rune]*TrieNode
End bool
}
func NewTrie() Trie {
var r Trie
r.Root = NewTrieNode()
return r
}
func NewTrieNode() *TrieNode {
n := new(TrieNode)
n.Children = make(map[rune]*TrieNode)
return n
}
func (this *Trie) Inster(txt string) {
if len(txt) < 1 {
return
}
node := this.Root
key := []rune(txt)
for i := 0; i < len(key); i++ {
if _, exists := node.Children[key[i]]; !exists {
node.Children[key[i]] = NewTrieNode()
}
node = node.Children[key[i]]
}
node.End = true
}
func (this *Trie) HasDirty(txt string) bool {
if len(txt) < 1 {
return false
}
node := this.Root
key := []rune(txt)
var chars []rune = nil
slen := len(key)
for i := 0; i < slen; i++ {
if _, exists := node.Children[key[i]]; exists {
node = node.Children[key[i]]
for j := i + 1; j < slen; j++ {
if _, exists := node.Children[key[j]]; exists {
node = node.Children[key[j]]
if node.End == true {
if chars == nil {
chars = key
}
for t := i; t <= j; t++ {
return true
}
i = j
node = this.Root
break
}
}
}
node = this.Root
}
}
return false
}
func (this *Trie) Replace(txt string) string {
if len(txt) < 1 {
return txt
}
node := this.Root
key := []rune(txt)
var chars []rune = nil
slen := len(key)
for i := 0; i < slen; i++ {
if _, exists := node.Children[key[i]]; exists {
node = node.Children[key[i]]
for j := i + 1; j < slen; j++ {
if _, exists := node.Children[key[j]]; exists {
node = node.Children[key[j]]
if node.End == true {
if chars == nil {
chars = key
}
for t := i; t <= j; t++ {
c, _ := utf8.DecodeRuneInString("*")
chars[t] = c
}
i = j
node = this.Root
break
}
}
}
node = this.Root
}
}
if chars == nil {
return txt
} else {
return string(chars)
}
}
// Trie_test.go
// 358860528@qq.com
// 测试案例
package comm
import (
"testing"
)
//测试案例
func Test_trie(t *testing.T) {
ti := NewTrie()
ti.Inster("脏话")
ti.Inster("mb")
s := ti.Replace("不能说脏话也不能说mb")
t.Log(ti.HasDirty("不能说脏话也不能说mb"))
t.Log(s)
s = ti.Replace("不能说脏也不能说m")
t.Log(ti.HasDirty("不能说脏也不能说m"))
t.Log(s)
}
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