{"id":904,"date":"2025-04-30T16:09:03","date_gmt":"2025-04-30T08:09:03","guid":{"rendered":"https:\/\/beijian99.top\/?p=904"},"modified":"2025-05-08T14:11:51","modified_gmt":"2025-05-08T06:11:51","slug":"%e5%b8%83%e9%9a%86%e8%bf%87%e6%bb%a4%e5%99%a8","status":"publish","type":"post","link":"https:\/\/beijian99.top\/?p=904","title":{"rendered":"\u5e03\u9686\u8fc7\u6ee4\u5668"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n
\n

\u5e03\u9686\u8fc7\u6ee4\u5668\uff08Bloom Filter\uff09\u662f\u4e00\u79cd\u7a7a\u95f4\u6548\u7387\u6781\u9ad8\u7684\u6982\u7387\u578b\u6570\u636e\u7ed3\u6784\uff0c\u7531Burton Howard Bloom\u4e8e1970\u5e74\u63d0\u51fa\u3002\u6700\u6838\u5fc3\u7684\u4f5c\u7528\u662f\u200b\u200b\u5feb\u901f\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u53ef\u80fd\u5b58\u5728\u4e8e\u4e00\u4e2a\u96c6\u5408\u4e2d\u200b<\/strong>\u200b\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u4e00\u3001\u5e03\u9686\u8fc7\u6ee4\u5668\u57fa\u7840\u7406\u8bba<\/h2>\n\n\n\n

1.1 \u6570\u636e\u7ed3\u6784\u539f\u7406<\/h3>\n\n\n\n

\u5e03\u9686\u8fc7\u6ee4\u5668\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a<\/p>\n\n\n\n

    \n
  • \u4e00\u4e2a\u957f\u5ea6\u4e3am\u7684\u4f4d\u6570\u7ec4\uff08Bit Array\uff09<\/li>\n\n\n\n
  • k\u4e2a\u4e0d\u540c\u7684\u54c8\u5e0c\u51fd\u6570<\/li>\n<\/ul>\n\n\n\n

    \u5f53\u6dfb\u52a0\u5143\u7d20\u65f6\uff0c\u4f1a\u4f7f\u7528k\u4e2a\u54c8\u5e0c\u51fd\u6570\u8ba1\u7b97\u51fak\u4e2a\u54c8\u5e0c\u503c\uff0c\u5e76\u5c06\u4f4d\u6570\u7ec4\u4e2d\u5bf9\u5e94\u7684\u4f4d\u7f6e\u8bbe\u4e3a1\u3002\u67e5\u8be2\u65f6\uff0c\u540c\u6837\u8ba1\u7b97k\u4e2a\u54c8\u5e0c\u503c\uff0c\u53ea\u6709\u6240\u6709\u5bf9\u5e94\u4f4d\u90fd\u4e3a1\u65f6\u624d\u8ba4\u4e3a\u5143\u7d20\u53ef\u80fd\u5b58\u5728\uff08\u53ef\u80fd\u6709\u8bef\u5224\uff09\u3002<\/p>\n\n\n\n

    1.2 \u7279\u6027\u5206\u6790<\/h3>\n\n\n\n

    \u4f18\u70b9\uff1a<\/p>\n\n\n\n

      \n
    • \u7a7a\u95f4\u6548\u7387\u6781\u9ad8\uff0c\u8fdc\u8d85\u8fc7\u54c8\u5e0c\u8868<\/li>\n\n\n\n
    • \u67e5\u8be2\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(k)\uff0c\u4e0e\u5143\u7d20\u6570\u91cf\u65e0\u5173<\/li>\n\n\n\n
    • \u6dfb\u52a0\u5143\u7d20\u65f6\u95f4\u4e5f\u662fO(k)<\/li>\n<\/ul>\n\n\n\n

      \u7f3a\u70b9\uff1a<\/p>\n\n\n\n

        \n
      • \u5b58\u5728\u8bef\u5224\u7387\uff08False Positive\uff09<\/li>\n\n\n\n
      • \u65e0\u6cd5\u5220\u9664\u5143\u7d20\uff08\u9664\u975e\u4f7f\u7528\u53d8\u79cd\u5982Counting Bloom Filter\uff09<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        1.3 \u53c2\u6570\u8bbe\u8ba1<\/h3>\n\n\n\n

        \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u6027\u80fd\u53d6\u51b3\u4e8e\u4e09\u4e2a\u53c2\u6570\uff1a<\/p>\n\n\n\n

          \n
        • n\uff1a\u9884\u671f\u5143\u7d20\u6570\u91cf<\/li>\n\n\n\n
        • m\uff1a\u4f4d\u6570\u7ec4\u957f\u5ea6<\/li>\n\n\n\n
        • k\uff1a\u54c8\u5e0c\u51fd\u6570\u6570\u91cf<\/li>\n<\/ul>\n\n\n\n

          \u6700\u4f18\u53c2\u6570\u5173\u7cfb\uff1a<\/p>\n\n\n\n

            \n
          • m = – (n * ln p) \/ (ln 2)^2<\/li>\n\n\n\n
          • k = (m \/ n) * ln 2<\/li>\n<\/ul>\n\n\n\n

            \u5176\u4e2dp\u662f\u671f\u671b\u7684\u8bef\u5224\u7387<\/p>\n\n\n\n

            \u4e8c\u3001bits-and-blooms\/bloom\/v3\u67b6\u6784\u89e3\u6790<\/h2>\n\n\n\n

            2.1 \u6a21\u5757\u7ec4\u6210<\/h3>\n\n\n\n

            \u8be5\u5e93\u4e3b\u8981\u7531\u4ee5\u4e0b\u6838\u5fc3\u7ec4\u4ef6\u6784\u6210\uff1a<\/p>\n\n\n\n

              \n
            1. BloomFilter\u7ed3\u6784\u4f53\uff1a\u4e3b\u8fc7\u6ee4\u5668\u5b9e\u73b0<\/li>\n\n\n\n
            2. \u54c8\u5e0c\u51fd\u6570\u6a21\u5757\uff1a\u4f18\u5316\u7684MurmurHash3\u5b9e\u73b0<\/li>\n\n\n\n
            3. bitset\uff1a\u9ad8\u6548\u7684\u4f4d\u96c6\u5408\u64cd\u4f5c<\/li>\n\n\n\n
            4. \u53c2\u6570\u4f30\u7b97\u6a21\u5757\uff1a\u81ea\u52a8\u8ba1\u7b97\u6700\u4f18m\u548ck<\/li>\n<\/ol>\n\n\n\n

              2.2 \u6838\u5fc3\u6570\u636e\u7ed3\u6784<\/h3>\n\n\n
              \ntype BloomFilter struct {\n    m uint          \/\/ \u4f4d\u6570\u7ec4\u957f\u5ea6\n    k uint          \/\/ \u54c8\u5e0c\u51fd\u6570\u6570\u91cf\n    b *bitset.BitSet \/\/ \u4f4d\u96c6\u5408\u5b9e\u73b0\n}\n<\/pre><\/div>\n\n\n
              2.3 \u54c8\u5e0c\u51fd\u6570\u5b9e\u73b0<\/h3>\n\n\n\n
              \u8be5\u5e93\u4f7f\u7528\u81ea\u884c\u5b9e\u73b0\u7684MurmurHash3\u53d8\u79cd\uff0c\u5173\u952e\u4f18\u5316\u70b9\u5305\u62ec\uff1a<\/p>\n\n\n\n
                \n
              1. \u5b8c\u5168\u907f\u514d\u5806\u5185\u5b58\u5206\u914d<\/li>\n\n\n\n
              2. \u4f7f\u7528unsafe\u76f4\u63a5\u64cd\u4f5c\u5b57\u8282\u5207\u7247<\/li>\n\n\n\n
              3. \u5185\u8054\u5173\u952e\u4f4d\u64cd\u4f5c<\/li>\n\n\n\n
              4. \u4e00\u6b21\u8ba1\u7b97\u53ef\u751f\u62104\u4e2a\u54c8\u5e0c\u503c<\/li>\n<\/ol>\n\n\n
                \nfunc (d *digest128) sum256(data []byte) (hash1, hash2, hash3, hash4 uint64) {\n    \/\/ \u4f18\u5316\u7684\u54c8\u5e0c\u8ba1\u7b97\u8fc7\u7a0b\n   \/\/ We always start from zero.\n\td.h1, d.h2 = 0, 0\n\t\/\/ Process as many bytes as possible.\n\td.bmix(data)\n\t\/\/ We have enough to compute the first two 64-bit numbers\n\tlength := uint(len(data))\n\ttail_length := length % block_size\n\ttail := data[length-tail_length:]\n\thash1, hash2 = d.sum128(false, length, tail)\n\t\/\/ Next we want to 'virtually' append 1 to the input, but,\n\t\/\/ we do not want to append to an actual array!!!\n\tif tail_length+1 == block_size {\n\t\t\/\/ We are left with no tail!!!\n\t\tword1 := binary.LittleEndian.Uint64(tail[:8])\n\t\tword2 := uint64(binary.LittleEndian.Uint32(tail[8 : 8+4]))\n\t\tword2 = word2 | (uint64(tail[12]) << 32) | (uint64(tail[13]) << 40) | (uint64(tail[14]) << 48)\n\t\t\/\/ We append 1.\n\t\tword2 = word2 | (uint64(1) << 56)\n\t\t\/\/ We process the resulting 2 words.\n\t\td.bmix_words(word1, word2)\n\t\ttail := data[length:] \/\/ empty slice, deliberate.\n\t\thash3, hash4 = d.sum128(false, length+1, tail)\n\t} else {\n\t\t\/\/ We still have a tail (fewer than 15 bytes) but we\n\t\t\/\/ need to append '1' to it.\n\t\thash3, hash4 = d.sum128(true, length+1, tail)\n\t}\n\n\treturn hash1, hash2, hash3, hash4\n}\n<\/pre><\/div>\n\n\n
                \u4e09\u3001\u5173\u952e\u64cd\u4f5c\u5b9e\u73b0\u89e3\u6790<\/h2>\n\n\n\n
                3.1 \u521d\u59cb\u5316\u8fc7\u6ee4\u5668<\/h3>\n\n\n
                \n\/\/ \u76f4\u63a5\u6307\u5b9a\u53c2\u6570\nfilter := bloom.New(m, k)\n\n\/\/ \u81ea\u52a8\u4f30\u7b97\u53c2\u6570\nfilter := bloom.NewWithEstimates(n, fp)\n<\/pre><\/div>\n\n\n
                \u53c2\u6570\u4f30\u7b97\u7b97\u6cd5\uff1a<\/p>\n\n\n
                \nfunc EstimateParameters(n uint, p float64) (m uint, k uint) {\n    m = uint(math.Ceil(-1 * float64(n) * math.Log(p) \/ math.Pow(math.Log(2), 2)))\n    k = uint(math.Ceil(math.Log(2) * float64(m) \/ float64(n)))\n    return\n}\n<\/pre><\/div>\n\n\n
                3.2 \u6dfb\u52a0\u5143\u7d20<\/h3>\n\n\n
                \nfunc (f *BloomFilter) Add(data []byte) *BloomFilter {\n    h := baseHashes(data)  \/\/ \u83b7\u53d64\u4e2a\u57fa\u7840\u54c8\u5e0c\u503c\n    for i := uint(0); i < f.k; i++ {\n        \/\/ \u8ba1\u7b97k\u4e2a\u4f4d\u7f6e\u5e76\u8bbe\u7f6e\u4f4d\n        f.b.Set(f.location(h, i))\n    }\n    return f\n}\n<\/pre><\/div>\n\n\n
                \u4f4d\u7f6e\u8ba1\u7b97\u7b97\u6cd5\uff1a<\/p>\n\n\n
                \nfunc location(h [4]uint64, i uint) uint64 {\n    ii := uint64(i)\n    return h[ii%2] + ii*h[2+(((ii+(ii%2))%4)\/2)]\n}\n<\/pre><\/div>\n\n\n
                3.3 \u67e5\u8be2\u5143\u7d20<\/h3>\n\n\n
                \nfunc (f *BloomFilter) Test(data []byte) bool {\n    h := baseHashes(data)\n    for i := uint(0); i < f.k; i++ {\n        if !f.b.Test(f.location(h, i)) {\n            return false\n        }\n    }\n    return true\n}\n<\/pre><\/div>\n\n\n
                3.4 \u9ad8\u7ea7\u64cd\u4f5c<\/h3>\n\n\n\n
                  \n
                1. \u539f\u5b50\u6027\u6d4b\u8bd5\u5e76\u6dfb\u52a0\uff1a<\/li>\n<\/ol>\n\n\n
                  \nfunc (f *BloomFilter) TestOrAdd(data []byte) bool {\n    present := true\n    h := baseHashes(data)\n    for i := uint(0); i < f.k; i++ {\n        l := f.location(h, i)\n        if !f.b.Test(l) {\n            present = false\n            f.b.Set(l)\n        }\n    }\n    return present\n}\n<\/pre><\/div>\n\n\n
                    \n
                  1. \u5408\u5e76\u8fc7\u6ee4\u5668\uff1a<\/li>\n<\/ol>\n\n\n
                    \nfunc (f *BloomFilter) Merge(g *BloomFilter) error {\n    if f.m != g.m || f.k != g.k {\n        return errors.New("\u53c2\u6570\u4e0d\u5339\u914d")\n    }\n    f.b.InPlaceUnion(g.b)\n    return nil\n}\n<\/pre><\/div>\n\n\n
                    3.5 \u57fa\u672c\u7528\u6cd5<\/h3>\n\n\n
                    \npackage main\n\nimport (\n\t"fmt"\n\t"github.com\/bits-and-blooms\/bloom\/v3"\n)\n\nfunc main() {\n\t\/\/ \u521b\u5efa\u4e00\u4e2a\u5e03\u9686\u8fc7\u6ee4\u5668\uff0c\u9884\u8ba1\u5305\u542b10000\u4e2a\u5143\u7d20\uff0c\u8bef\u5224\u7387\u4e3a0.01%\n\tfilter := bloom.NewWithEstimates(10000, 0.0001)\n\n\t\/\/ \u6dfb\u52a0\u5143\u7d20\n\tfilter.Add([]byte("hello"))\n\tfilter.Add([]byte("world"))\n\tfilter.Add([]byte("golang"))\n\n\t\/\/ \u6d4b\u8bd5\u5143\u7d20\u662f\u5426\u5b58\u5728\n\tfmt.Println("Contains 'hello':", filter.Test([]byte("hello")))   \/\/ true\n\tfmt.Println("Contains 'world':", filter.Test([]byte("world")))   \/\/ true\n\tfmt.Println("Contains 'golang':", filter.Test([]byte("golang"))) \/\/ true\n\tfmt.Println("Contains 'python':", filter.Test([]byte("python"))) \/\/ false (\u53ef\u80fd)\n\n\t\/\/ \u83b7\u53d6\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u7edf\u8ba1\u4fe1\u606f\n\tfmt.Printf("Filter capacity: %d\\n", filter.Cap())\n\tfmt.Printf("Filter K (number of hash functions): %d\\n", filter.K())\n}\n\n<\/pre><\/div>\n\n\n
                    \u56db\u3001\u6027\u80fd\u4f18\u5316\u6280\u672f<\/h2>\n\n\n\n
                    4.1 \u54c8\u5e0c\u8ba1\u7b97\u4f18\u5316<\/h3>\n\n\n\n
                      \n
                    1. \u4f7f\u7528unsafe.Pointer\u76f4\u63a5\u8bbf\u95ee\u5b57\u8282\u5207\u7247\uff0c\u907f\u514d\u62f7\u8d1d\uff1a<\/li>\n<\/ol>\n\n\n\n
                      b := (*[16]byte)(unsafe.Pointer(&p[i*block_size]))<\/code><\/pre>\n\n\n\n
                        \n
                      1. \u5185\u8054\u5173\u952e\u4f4d\u64cd\u4f5c\uff1a<\/li>\n<\/ol>\n\n\n
                        \nh1 = bits.RotateLeft64(h1, 27)\nh1 += h2\nh1 = h1 * 5 + 0x52dce729\n<\/pre><\/div>\n\n\n
                        4.2 \u5185\u5b58\u7ba1\u7406<\/h3>\n\n\n\n
                          \n
                        1. \u4f4d\u96c6\u5408\u4f7f\u7528\u7d27\u51d1\u5b58\u50a8<\/li>\n\n\n\n
                        2. \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5185\u5b58\u5206\u914d<\/li>\n\n\n\n
                        3. \u6279\u91cf\u64cd\u4f5c\u51cf\u5c11\u51fd\u6570\u8c03\u7528\u5f00\u9500<\/li>\n<\/ol>\n\n\n\n
                          4.3 \u5e76\u53d1\u5b89\u5168<\/h3>\n\n\n\n
                          \u6807\u51c6\u5b9e\u73b0\u4e0d\u662f\u5e76\u53d1\u5b89\u5168\u7684\uff0c\u5982\u9700\u5e76\u53d1\u4f7f\u7528\u9700\u8981\uff1a<\/p>\n\n\n\n
                            \n
                          1. \u4f7f\u7528sync.Mutex\u5305\u88c5<\/li>\n\n\n\n
                          2. \u6216\u4f7f\u7528\u6bcf\u4e2agoroutine\u72ec\u7acb\u7684\u8fc7\u6ee4\u5668\u6700\u540e\u5408\u5e76<\/li>\n<\/ol>\n\n\n\n
                            \u4e94\u3001\u5b9e\u8df5\u5e94\u7528\u6848\u4f8b<\/h2>\n\n\n\n
                            <\/p>\n\n\n\n
                            5.1 \u7f13\u5b58\u7a7f\u900f\u9632\u62a4<\/h3>\n\n\n\n
                            func getFromCache(key string) ([]byte, error) {
                                if !bloomFilter.TestString(key) {
                                    return nil, ErrNotExist
                                }
                                \/\/ \u7ee7\u7eed\u67e5\u8be2\u7f13\u5b58...
                            }<\/code><\/pre>\n\n\n\n
                            5.2 \u722c\u866bURL\u53bb\u91cd<\/h3>\n\n\n\n
                            func shouldCrawl(url string) bool {
                                if bloomFilter.TestString(url) {
                                    return false
                                }
                                bloomFilter.AddString(url)
                                return true
                            }<\/code><\/pre>\n\n\n\n
                            5.3 \u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316<\/h3>\n\n\n\n
                            func queryDB(userID string) {
                                if !filter.TestString(userID) {
                                    return \/\/ \u80af\u5b9a\u4e0d\u5b58\u5728
                                }
                                \/\/ \u7ee7\u7eed\u67e5\u8be2\u6570\u636e\u5e93...
                            }<\/code><\/pre>\n\n\n\n
                            \u516d\u3001\u6700\u4f73\u5b9e\u8df5\u5efa\u8bae<\/h2>\n\n\n\n
                              \n
                            1. \u53c2\u6570\u9009\u62e9\uff1a\n
                                \n
                              • \u5bf9\u4e8e100\u4e07\u5143\u7d20\uff0c1%\u8bef\u5224\u7387\u7ea6\u97009585059\u4f4d(1.14MB)\u548c7\u4e2a\u54c8\u5e0c\u51fd\u6570 <\/li>\n\n\n\n
                              • \u4f7f\u7528EstimateParameters<\/code>\u81ea\u52a8\u8ba1\u7b97<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                              • \u6027\u80fd\u8c03\u4f18\uff1a\n
                                  \n
                                • \u5bf9\u4e8e\u5df2\u77e5\u56fa\u5b9a\u5927\u5c0f\u6570\u636e\u96c6\uff0c\u53ef\u9002\u5f53\u589e\u52a0m\u51cf\u5c11\u8bef\u5224\u7387 <\/li>\n\n\n\n
                                • \u5bf9\u4e8e\u5185\u5b58\u654f\u611f\u573a\u666f\uff0c\u53ef\u63a5\u53d7\u7a0d\u9ad8\u8bef\u5224\u7387\u51cf\u5c11\u5185\u5b58\u4f7f\u7528<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                                • \u9519\u8bef\u5904\u7406\uff1a\n
                                    \n
                                  • \u5bf9\u4e8e\u5173\u952e\u4e1a\u52a1\uff0c\u5e03\u9686\u8fc7\u6ee4\u5668\u7ed3\u679c\u5e94\u4f5c\u4e3a\u524d\u7f6e\u6761\u4ef6\u800c\u975e\u6700\u7ec8\u5224\u65ad <\/li>\n\n\n\n
                                  • \u53ef\u7ed3\u5408\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u51cf\u5c11\u8bef\u5224\u5f71\u54cd<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                                  • \u6269\u5c55\u573a\u666f\uff1a\n
                                      \n
                                    • \u5927\u6570\u636e\u96c6\u8003\u8651\u5206\u7247\u5e03\u9686\u8fc7\u6ee4\u5668 <\/li>\n\n\n\n
                                    • \u52a8\u6001\u589e\u957f\u6570\u636e\u96c6\u8003\u8651Scalable Bloom Filter<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
                                      \u5e03\u9686\u8fc7\u6ee4\u5668\uff08Bloom Filter\uff09\u662f\u4e00\u79cd\u7a7a\u95f4\u6548\u7387\u6781\u9ad8\u7684\u6982\u7387\u578b\u6570\u636e\u7ed3\u6784\uff0c\u7531Burton Howard Blo […]<\/p>\n","protected":false},"author":1,"featured_media":925,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4],"tags":[148],"class_list":["post-904","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-algorithm","tag-bloom-filter"],"_links":{"self":[{"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/posts\/904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/beijian99.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=904"}],"version-history":[{"count":15,"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/posts\/904\/revisions"}],"predecessor-version":[{"id":956,"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/posts\/904\/revisions\/956"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/beijian99.top\/index.php?rest_route=\/wp\/v2\/media\/925"}],"wp:attachment":[{"href":"https:\/\/beijian99.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beijian99.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beijian99.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}