“`” \u53c2\u8003\u56de\u7b54\uff1a<\/p>\n
\u7b97\u6cd51.map(key,value)<\/p>\n
\u8f93\u5165\uff1a\u5168\u5c40\u53d8\u91cfcenters\uff0c\u504f\u79fb\u91cfkey\uff0c\u6837\u672cvalue<\/p>\n
\u8f93\u51fa\uff1a<key\u2019,value>\u5bf9\uff0c\u5176\u4e2dkey\u2019\u662f\u6700\u8fd1\u4e2d\u5fc3\u7684\u7d22\u5f15\uff0cvalue\u2019\u662f\u6837\u672c\u4fe1\u606f\u7684\u5b57\u7b26\u4e32<\/p>\n
\u4ecevalue\u6784\u9020\u6837\u672c\u7684instance\uff1b<\/p>\n
<pre><code>minDis=Double.MAX_VALUE\uff1b
\nIndex=-1\uff1b
\nFor i=0 to centers.length do
\ndis=ComputeDist(instance,centers[i]);
\nIf dis<minDis{
\nminDis=dis;
\nindex=i;
\n}
\nEnd For
\n<\/code><\/pre><\/p>\n
\u628aindex\u4f5c\u4e3akey\u2019\uff1b<\/p>\n
\u628a\u4e0d\u540c\u7ef4\u5ea6\u7684values\u6784\u9020\u6210value\u2019\uff1b<\/p>\n
\u8f93\u51fa<key\u2019,value\u2019>\u5bf9\uff1b<\/p>\n
End<\/p>\n
\u6ce8\u610f\u8fd9\u91cc\u7684Step 2\u548cStep 3\u521d\u59cb\u5316\u4e86\u8f85\u52a9\u53d8\u91cfminDis\u548cindex\uff1bStep 4\u901a\u8fc7\u8ba1\u7b97\u627e\u51fa\u4e86\u4e0e\u6837\u672c\u6700\u8fd1\u7684\u4e2d\u5fc3\u70b9\uff0c\u51fd\u6570ComputeDist(instance,centers[i])\u8fd4\u56de\u6837\u672c\u548c\u4e2d\u5fc3\u70b9centers[i]\u7684\u8ddd\u79bb\uff1bStep 8\u8f93\u51fa\u4e86\u7528\u6765\u8fdb\u884c\u4e0b\u4e00\u4e2a\u8fc7\u7a0b\uff08combiner\uff09\u7684\u4e2d\u95f4\u6570\u636e\u3002<\/p>\n
Combine\u51fd\u6570.\u2003\u6bcf\u4e2amap\u4efb\u52a1\u5b8c\u6210\u4e4b\u540e\uff0c\u6211\u4eec\u7528combiner\u53bb\u5408\u5e76\u540c\u4e00\u4e2amap\u4efb\u52a1\u7684\u4e2d\u95f4\u7ed3\u679c\u3002\u56e0\u4e3a\u4e2d\u95f4\u7ed3\u679c\u662f\u5b58\u50a8\u5728\u7ed3\u70b9\u7684\u672c\u5730\u78c1\u76d8\u4e0a\uff0c\u6240\u4ee5\u8fd9\u4e2a\u8fc7\u7a0b\u4e0d\u4f1a\u8017\u8d39\u7f51\u7edc\u4f20\u8f93\u7684\u4ee3\u4ef7\u3002\u5728combine\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u628a\u5c5e\u4e8e\u76f8\u540c\u7c07\u7684values\u6c42\u548c\u3002\u4e3a\u4e86\u8ba1\u7b97\u6bcf\u4e2a\u7c07\u7684\u5bf9\u8c61\u7684\u5e73\u5747\u503c\uff0c\u6211\u4eec\u9700\u8981\u8bb0\u5f55\u6bcf\u4e2amap\u7684\u6bcf\u4e2a\u7c07\u4e2d\u6837\u672c\u7684\u603b\u6570\u3002Combine\u51fd\u6570\u7684\u4f2a\u4ee3\u7801\u89c1\u7b97\u6cd52.<\/p>\n
\u7b97\u6cd52.combine(key,V)<\/p>\n
\u8f93\u5165\uff1akey\u4e3a\u7c07\u7684\u7d22\u5f15\uff0cV\u4e3a\u5c5e\u4e8e\u8be5\u7c07\u7684\u6837\u672c\u5217\u8868<\/p>\n
\u8f93\u51fa\uff1a<key\u2019,value\u2019>\u5bf9\uff0ckey\u2019\u4e3a\u7c07\u7684\u7d22\u5f15\uff0cvalue\u2019\u662f\u7531\u5c5e\u4e8e\u540c\u4e00\u7c7b\u7684\u6240\u6709\u6837\u672c\u603b\u548c\u4ee5\u53ca\u6837\u672c\u6570\u6240\u7ec4\u6210\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\u521d\u59cb\u5316\u4e00\u4e2a\u6570\u7ec4\uff0c\u7528\u6765\u8bb0\u5f55\u540c\u4e00\u7c7b\u7684\u6240\u6709\u6837\u672c\u7684\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u603b\u548c\uff0c\u6837\u672c\u662fV\u4e2d\u7684\u5143\u7d20\uff1b<\/p>\n
\u521d\u59cb\u5316\u4e00\u4e2a\u8ba1\u6570\u5668num\u4e3a0\u6765\u8bb0\u5f55\u5c5e\u4e8e\u540c\u4e00\u7c7b\u7684\u6837\u672c\u603b\u6570\uff1b<\/p>\n
While(V.hasNext()){<\/p>\n
\u4eceV.next()\u6784\u9020\u6837\u672c\u5b9e\u4f8binstance\uff1b<\/p>\n
\u628ainstance\u7684\u4e0d\u540c\u7ef4\u5ea6\u503c\u76f8\u52a0\u5230\u6570\u7ec4<\/p>\n
num++;<\/p>\n
}<\/p>\n
\u628akey\u4f5c\u4e3akey\u2019\uff1b<\/p>\n
\u6784\u9020value\u2019\uff1a\u4e0d\u540c\u7ef4\u5ea6\u7684\u6c42\u548c\u7ed3\u679c+num\uff1b<\/p>\n
\u8f93\u51fa<key\u2019,value\u2019>\u5bf9\uff1b<\/p>\n
End<\/p>\n
Reduce\u51fd\u6570.\u2003Reduce\u51fd\u6570\u7684\u8f93\u5165\u6570\u636e\u7531\u6bcf\u4e2a\u7ed3\u70b9\u7684combine\u51fd\u6570\u83b7\u5f97\u3002\u5982combine\u51fd\u6570\u6240\u63cf\u8ff0\uff0c\u8f93\u5165\u6570\u636e\u5305\u62ec\u90e8\u5206\u6837\u672c\uff08\u540c\u4e00\u7c7b\uff09\u7684\u6c42\u548c\u4ee5\u53ca\u5bf9\u5e94\u6837\u672c\u6570\u3002\u5728reduce\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u540c\u4e00\u7c7b\u7684\u6240\u6709\u6837\u672c\u6c42\u548c\u5e76\u4e14\u8ba1\u7b97\u51fa\u5bf9\u5e94\u7684\u6837\u672c\u6570\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u7528\u4e8e\u4e0b\u4e00\u8f6e\u8fed\u4ee3\u7684\u65b0\u4e2d\u5fc3\u3002Reduce\u51fd\u6570\u7684\u4f2a\u4ee3\u7801\u89c1\u7b97\u6cd53\u3002<\/p>\n
\u7b97\u6cd53.Reduce(key,V)<\/p>\n
\u8f93\u5165\uff1akey\u4e3a\u7c07\u7684\u7d22\u5f15\uff0cV\u4e3a\u6765\u81ea\u4e0d\u540c\u7ed3\u70b9\u7684\u90e8\u5206\u603b\u548c\u7684\u6837\u672c\u5217\u8868<\/p>\n
\u8f93\u51fa\uff1a<key\u2019,value\u2019>\u5bf9\uff0ckey\u2019\u4e3a\u7c07\u7684\u7d22\u5f15\uff0cvalue\u2019\u662f\u4ee3\u8868\u65b0\u7684\u805a\u7c7b\u4e2d\u5fc3\u7684\u5b57\u7b26\u4e32<\/p>\n
\u521d\u59cb\u5316\u4e00\u4e2a\u6570\u7ec4\uff0c\u7528\u6765\u8bb0\u5f55\u540c\u4e00\u7c7b\u7684\u6240\u6709\u6837\u672c\u7684\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u603b\u548c\uff0c\u6837\u672c\u662fV\u4e2d\u7684\u5143\u7d20\uff1b<\/p>\n
\u521d\u59cb\u5316\u4e00\u4e2a\u8ba1\u6570\u5668NUM\u4e3a0\u6765\u8bb0\u5f55\u5c5e\u4e8e\u540c\u4e00\u7c7b\u7684\u6837\u672c\u603b\u6570\uff1b<\/p>\n
While(V.hasNext()){<\/p>\n
\u4eceV.next()\u6784\u9020\u6837\u672c\u5b9e\u4f8binstance\uff1b<\/p>\n
\u628ainstance\u7684\u4e0d\u540c\u7ef4\u5ea6\u503c\u76f8\u52a0\u5230\u6570\u7ec4<\/p>\n
NUM+=num;<\/p>\n
}<\/p>\n
\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u9664\u4ee5NUM\u6765\u83b7\u5f97\u65b0\u7684\u4e2d\u5fc3\u5750\u6807\uff1b<\/p>\n
\u628akey\u4f5c\u4e3akey\u2019\uff1b<\/p>\n
\u6784\u9020value\u2019\u4e3a\u6240\u6709\u4e2d\u5fc3\u5750\u6807\u7684\u5b57\u7b26\u4e32\uff1b<\/p>\n
\u8f93\u51fa<key\u2019,value\u2019>\u5bf9\uff1b<\/p>\n
End<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u53c2\u8003\u56de\u7b54\uff1a \u7b97\u6cd51.map(key,value) \u8f93\u5165\uff1a\u5168\u5c40\u53d8\u91cfcenters […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-45001","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=45001"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45001\/revisions"}],"predecessor-version":[{"id":45002,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45001\/revisions\/45002"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=45001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=45001"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=45001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}