{"id":185153,"date":"2020-11-02T17:18:32","date_gmt":"2020-11-02T09:18:32","guid":{"rendered":"http:\/\/4563.org\/?p=185153"},"modified":"2020-11-02T17:18:32","modified_gmt":"2020-11-02T09:18:32","slug":"golang-%e5%88%87%e7%89%87%e7%9a%84%e4%b8%80%e4%b8%aa%e5%a5%87%e6%80%aa%e7%9a%84%e7%8e%b0%e8%b1%a1","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=185153","title":{"rendered":"golang \u5207\u7247\u7684\u4e00\u4e2a\u5947\u602a\u7684\u73b0\u8c61"},"content":{"rendered":"
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golang \u5207\u7247\u7684\u4e00\u4e2a\u5947\u602a\u7684\u73b0\u8c61 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : vzard <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u6709\u5982\u4e0b\u6c42\u5168\u6392\u5217\u4ee3\u7801\uff1a<\/p>\n

package main  import (  \"fmt\" )  func main() {  res := permute([]int{5,4,6,2})  fmt.Println(res) }  var result [][]int func permute(nums []int) [][]int {  result = make([][]int,0)  track := make([]int,0)  trackBack(nums,track)  return result }  func trackBack(nums []int, track []int) {  if len(track) == len(nums) {   \/\/tmp := make([]int,len(nums))   \/\/copy(tmp,track)   \/\/result = append(result,tmp)      result = append(result,track)   return  }   for _,i := range nums {   \/\/ \u5df2\u7ecf\u5728\u8def\u5f84\u4e2d\u7684\u526a\u679d\u526a\u6389   if isInSlice(track,i) {    continue   }   track = append(track,i)   trackBack(nums,track)   track = track[:len(track)-1]  }  }  func isInSlice(nums []int,item int) bool {  for _,i := range nums {   if i == item {    return true   }  }  return false }  <\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
[[5 4 2 6] [5 4 2 6] [5 6 2 4] [5 6 2 4] [5 2 6 4] [5 2 6 4] [4 5 2 6] [4 5 2 6] [4 6 2 5] [4 6 2 5] [4 2 6 5] [4 2 6 5] [6 5 2 4] [6 5 2 4] [6 4 2 5] [6 4 2 5] [6 2 4 5] [6 2 4 5] [2 5 6 4] [2 5 6 4] [2 4 6 5] [2 4 6 5] [2 6 4 5] [2 6 4 5]] <\/code><\/pre>\n
\u7531\u4e8e\u5207\u7247\u5e95\u5c42\u90fd\u662f\u516c\u7528\u4e00\u4efd\u5185\u5b58,\u4fee\u6539\u5b50\u5207\u7247\u7684\u503c\u4e5f\u4f1a\u5f71\u54cd\u5230\u7236\u5207\u7247,\u6240\u4ee5\u6b63\u5e38\u7684\u4f7f\u7528\u65b9\u5f0f\u5e94\u8be5\u662f\u5728\u6bcf\u6b21 append \u7684\u65f6\u5019\u8981\u4f7f\u7528\u4e00\u4e2a tmp \u5207\u7247\u6765 copy \u4e00\u4e2a\u590d\u5236\u7684\u503c,\u7136\u540e append tmp \u5207\u7247\uff0c\u4e0d\u7136\u7ed3\u679c\u91cc\u7684\u503c\u90fd\u5c06\u4f1a\u662f\u6700\u540e append \u7684\u5143\u7d20\u7684\u503c\uff08\u56e0\u4e3a\u5b83\u4eec\u90fd\u662f\u516c\u7528\u7684\u4e00\u4efd\u5185\u5b58\u6570\u636e\uff09\uff0c\u4f46\u662f\u8fd9\u4e2a\u95ee\u9898\u6bd4\u8f83\u8be1\u5f02\u7684\u5730\u65b9\u662f\uff0c\u4ed6\u53ea\u6709\u76f8\u90bb\u7684\u4e24\u4e24\u5143\u7d20\u662f\u4e00\u6837\u7684\uff0c\u4e0d\u7b26\u5408\u9884\u671f\uff0c\u6709\u5927\u4f6c\u9047\u5230\u8fc7\u7c7b\u4f3c\u7684\u95ee\u9898\u4e48\uff1f<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (1<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vzard <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u627e\u5230\u539f\u56e0\u4e86\uff0c\u662f\u5207\u7247\u5185\u5b58\u81ea\u52a8\u6269\u5bb9\u548c\u7f29\u5bb9\u7684\u5751\uff1a
    “`
    \/\/ The append built-in function appends elements to the end of a slice. If
    \/\/ it has sufficient capacity, the destination is resliced to accommodate the
    \/\/ new elements. If it does not, a new underlying array will be allocated.
    \/\/ Append returns the updated slice. It is therefore necessary to store the
    \/\/ result of append, often in the variable holding the slice itself:
    \/\/ slice = append(slice, elem1, elem2)
    \/\/ slice = append(slice, anotherSlice…)
    \/\/ As a special case, it is legal to append a string to a byte slice, like this:
    \/\/ slice = append([]byte(“hello “), “world”…)
    func append(slice []Type, elems …Type) []Type
    “`
    \u5f53 cap \u4e0d\u591f\u7684\u65f6\u5019\u4f1a\u81ea\u52a8\u6269\u5bb9\uff0c\u5f53\u591a\u6b21\u6267\u884c`track = track[:len(track)-1]`\u8fd9\u6837\u7684\u64cd\u4f5c\u4e4b\u5207\u7247\u53c8\u4f1a\u81ea\u52a8\u7f29\u5bb9\uff0c\u6bcf\u6b21\u6269\u5bb9\u548c\u7f29\u5bb9\u90fd\u4f1a\u5bfc\u81f4\u5e95\u5c42\u6570\u7ec4\u7684\u5185\u5b58\u91cd\u65b0\u7533\u8bf7\uff0c\u6bcf\u4e24\u6b21\u5185\u5b58\u91cd\u65b0\u7533\u8bf7\u4e4b\u524d\u7684 append \u7684\u503c\u5c31\u4f1a\u4e00\u6837\uff0c\u589e\u52a0\u65e5\u5fd7\u53ef\u4ee5\u9a8c\u8bc1\uff1a
    “`
    Cap Before: 1, track: [5]
    Cap Before: 2, track: [5 4]
    Cap Before: 4, track: [5 4 6]
    Cap Before: 4, track: [5 4 6 2]
    Cap After: 4, track: [5 4 6]
    Cap After: 4, track: [5 4]
    Cap Before: 4, track: [5 4 2]
    Cap Before: 4, track: [5 4 2 6]
    Cap After: 4, track: [5 4 2]
    Cap After: 4, track: [5 4]
    Cap After: 2, track: [5]
    Cap Before: 2, track: [5 6]
    Cap Before: 4, track: [5 6 4]
    Cap Before: 4, track: [5 6 4 2]
    Cap After: 4, track: [5 6 4]
    Cap After: 4, track: [5 6]
    Cap Before: 4, track: [5 6 2]
    Cap Before: 4, track: [5 6 2 4]
    Cap After: 4, track: [5 6 2]
    Cap After: 4, track: [5 6]
    Cap After: 2, track: [5]
    Cap Before: 2, track: [5 2]
    Cap Before: 4, track: [5 2 4]
    Cap Before: 4, track: [5 2 4 6]
    Cap After: 4, track: [5 2 4]
    Cap After: 4, track: [5 2]
    Cap Before: 4, track: [5 2 6]
    Cap Before: 4, track: [5 2 6 4]
    Cap After: 4, track: [5 2 6]
    Cap After: 4, track: [5 2]
    Cap After: 2, track: [5]
    Cap After: 1, track: []
    Cap Before: 1, track: [4]
    Cap Before: 2, track: [4 5]
    Cap Before: 4, track: [4 5 6]
    Cap Before: 4, track: [4 5 6 2]
    Cap After: 4, track: [4 5 6]
    Cap After: 4, track: [4 5]
    Cap Before: 4, track: [4 5 2]
    Cap Before: 4, track: [4 5 2 6]
    Cap After: 4, track: [4 5 2]
    Cap After: 4, track: [4 5]
    Cap After: 2, track: [4]
    Cap Before: 2, track: [4 6]
    Cap Before: 4, track: [4 6 5]
    Cap Before: 4, track: [4 6 5 2]
    Cap After: 4, track: [4 6 5]
    Cap After: 4, track: [4 6]
    Cap Before: 4, track: [4 6 2]
    Cap Before: 4, track: [4 6 2 5]
    Cap After: 4, track: [4 6 2]
    Cap After: 4, track: [4 6]
    Cap After: 2, track: [4]
    Cap Before: 2, track: [4 2]
    Cap Before: 4, track: [4 2 5]
    Cap Before: 4, track: [4 2 5 6]
    Cap After: 4, track: [4 2 5]
    Cap After: 4, track: [4 2]
    Cap Before: 4, track: [4 2 6]
    Cap Before: 4, track: [4 2 6 5]
    Cap After: 4, track: [4 2 6]
    Cap After: 4, track: [4 2]
    Cap After: 2, track: [4]
    Cap After: 1, track: []
    Cap Before: 1, track: [6]
    Cap Before: 2, track: [6 5]
    Cap Before: 4, track: [6 5 4]
    Cap Before: 4, track: [6 5 4 2]
    Cap After: 4, track: [6 5 4]
    Cap After: 4, track: [6 5]
    Cap Before: 4, track: [6 5 2]
    Cap Before: 4, track: [6 5 2 4]
    Cap After: 4, track: [6 5 2]
    Cap After: 4, track: [6 5]
    Cap After: 2, track: [6]
    Cap Before: 2, track: [6 4]
    Cap Before: 4, track: [6 4 5]
    Cap Before: 4, track: [6 4 5 2]
    Cap After: 4, track: [6 4 5]
    Cap After: 4, track: [6 4]
    Cap Before: 4, track: [6 4 2]
    Cap Before: 4, track: [6 4 2 5]
    Cap After: 4, track: [6 4 2]
    Cap After: 4, track: [6 4]
    Cap After: 2, track: [6]
    Cap Before: 2, track: [6 2]
    Cap Before: 4, track: [6 2 5]
    Cap Before: 4, track: [6 2 5 4]
    Cap After: 4, track: [6 2 5]
    Cap After: 4, track: [6 2]
    Cap Before: 4, track: [6 2 4]
    Cap Before: 4, track: [6 2 4 5]
    Cap After: 4, track: [6 2 4]
    Cap After: 4, track: [6 2]
    Cap After: 2, track: [6]
    Cap After: 1, track: []
    Cap Before: 1, track: [2]
    Cap Before: 2, track: [2 5]
    Cap Before: 4, track: [2 5 4]
    Cap Before: 4, track: [2 5 4 6]
    Cap After: 4, track: [2 5 4]
    Cap After: 4, track: [2 5]
    Cap Before: 4, track: [2 5 6]
    Cap Before: 4, track: [2 5 6 4]
    Cap After: 4, track: [2 5 6]
    Cap After: 4, track: [2 5]
    Cap After: 2, track: [2]
    Cap Before: 2, track: [2 4]
    Cap Before: 4, track: [2 4 5]
    Cap Before: 4, track: [2 4 5 6]
    Cap After: 4, track: [2 4 5]
    Cap After: 4, track: [2 4]
    Cap Before: 4, track: [2 4 6]
    Cap Before: 4, track: [2 4 6 5]
    Cap After: 4, track: [2 4 6]
    Cap After: 4, track: [2 4]
    Cap After: 2, track: [2]
    Cap Before: 2, track: [2 6]
    Cap Before: 4, track: [2 6 5]
    Cap Before: 4, track: [2 6 5 4]
    Cap After: 4, track: [2 6 5]
    Cap After: 4, track: [2 6]
    Cap Before: 4, track: [2 6 4]
    Cap Before: 4, track: [2 6 4 5]
    Cap After: 4, track: [2 6 4]
    Cap After: 4, track: [2 6]
    Cap After: 2, track: [2]
    Cap After: 1, track: []<\/p>\n
    “`                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    golang \u5207\u7247\u7684\u4e00\u4e2a\u5947\u602a\u7684\u73b0\u8c61…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/185153"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=185153"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/185153\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=185153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=185153"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=185153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}