{"id":10382,"date":"2020-10-07T11:12:23","date_gmt":"2020-10-07T02:12:23","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=10382"},"modified":"2020-10-25T09:21:24","modified_gmt":"2020-10-25T00:21:24","slug":"strategy-%ed%8c%a8%ed%84%b4","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=10382","title":{"rendered":"[GoF] Strategy \ud328\ud134"},"content":{"rendered":"

\ud328\ud134\uba85\uce6d<\/h4>\n

Strategy<\/p>\n

\ud544\uc694\ud55c \uc0c1\ud669 <\/h4>\n

\ubcc0\uacbd\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc740 \uc5b4\ub5a4 \uc54c\uace0\ub9ac\uc998\uc744 \uc27d\uace0 \ud6a8\uacfc\uc801\uc73c\ub85c \uad50\uccb4\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\ub294 \ud328\ud134\uc774\ub2e4.<\/p>\n

\uc608\uc81c \ucf54\ub4dc <\/h4>\n

\"\"<\/p>\n

\uc608\uc2dc\ub97c \uc704\ud574 \uc774 \uae00\uc5d0\uc11c\ub294 \ubcc0\uacbd\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc740 \uc54c\uace0\ub9ac\uc998\uc744 1\ubd80\ud130 N\uae4c\uc9c0\uc758 \ud569\uacc4\ub97c \uad6c\ud558\ub294 \uac83\uc73c\ub85c \ud55c\ub2e4. \uc704\uc758 \ud074\ub798\uc2a4 \ub2e4\uc774\uc5b4\uadf8\ub7a8\uc5d0\uc11c NSumStrategy\ub294 \uc774 \uc54c\uace0\ub9ac\uc998\uc758 \uc5f0\uc0b0 \uacb0\uacfc\ub97c \uc5bb\uae30 \uc704\ud55c \uc778\ud130\ud398\uc774\uc2a4\ub9cc\uc744 \uc815\uc758\ud558\ub294 \uc778\ud130\ud398\uc774\uc2a4\uc774\uba70 Strategy \ud328\ud134\uc758 \ud575\uc2ec\uc774\ub2e4. \ucf54\ub4dc\ub294 \uc544\ub798\uc640 \uac19\ub2e4.<\/p>\n

\r\npackage pattern;\r\n\r\npublic interface NSumStrategy {\r\n\tlong sum(long N);\r\n}\r\n<\/pre>\n
Calculator \ud074\ub798\uc2a4\ub294 \uc5b4\ub5a4 \ubcf5\uc7a1\ud55c \uc5f0\uc0b0\uc744 \uc218\ud589\ud558\ub294 \uae30\ub2a5\uc744 \ud558\ub294\ub370, \ubcf5\uc7a1\ud55c \uc5f0\uc0b0 \uc18d\uc5d0 1\ubd80\ud130 N\uae4c\uc9c0 \ud569\uacc4\ub97c \ub0b4\ub294 \uc5f0\uc0b0\uc774 \ud544\uc694\ud558\ub2e4. \ucf54\ub4dc\ub294 \uc544\ub798\uc640 \uac19\ub2e4.<\/p>\n
\r\npackage pattern;\r\n\r\npublic class Calculator {\r\n\tprivate NSumStrategy strategy;\r\n\t\r\n\tpublic Calculator(NSumStrategy strategy) {\r\n\t\tthis.strategy = strategy;\r\n\t}\r\n\t\r\n\tpublic double run(int N) {\r\n\t\treturn Math.log(strategy.sum(N));\t\r\n\t}\r\n}\r\n<\/pre>\n
\uc774\uc81c 1\ubd80\ud130 N\uae4c\uc9c0 \ud569\uacc4\ub97c \ub0b4\ub294 \uc5f0\uc0b0\uc5d0 \ub300\ud55c \uad6c\uccb4\uc801\uc778 \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud574\ubcf4\uc790. \uba3c\uc800 SimpleSumStrategy \ud074\ub798\uc2a4\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4. \uac00\uc7a5 \ud754\ud558\uac8c \uc0ac\uc6a9\ub418\uba70 \ub9e4\uc6b0 \uc9c1\uad00\uc801\uc778 \ucf54\ub4dc\uc774\uc9c0\ub9cc, \ubc18\ubcf5\ubb38\uc744 \uc0ac\uc6a9\ud568\uc73c\ub85c\uc368 \uc218\ud589\uc18d\ub3c4\ub294 \ub290\ub9b0 \ubc29\ubc95\uc774\ub2e4.<\/p>\n
\r\npackage pattern;\r\n\r\npublic class SimpleNSumStrategy implements NSumStrategy {\r\n\t@Override\r\n\tpublic long sum(long N) {\r\n\t\tlong sum = N;\r\n\t\t\r\n\t\tfor(long i=1; i<N; i++) {\r\n\t\t\tsum += i;\r\n\t\t}\r\n\t\t\r\n\t\treturn sum;\r\n\t}\r\n}\r\n<\/pre>\n
\ub2e4\uc74c\uc740 \uac00\uc6b0\uc2a4 \ubc29\uc2dd\uc744 \uc0ac\uc6a9\ud558\ub294 GaussSumStrategy \ud074\ub798\uc2a4\uc774\ub2e4. \ubc18\ubcf5\ubb38\uc744 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uc544 \ub9e4\uc6b0 \uc18d\ub3c4\uac00 \ube60\ub974\ub2e4.<\/p>\n
\r\npackage pattern;\r\n\r\npublic class GaussSumStrategy implements NSumStrategy {\r\n\t@Override\r\n\tpublic long sum(long N) {\r\n\t\treturn (N+1)*N\/2;\r\n\t}\r\n}\r\n<\/pre>\n
\uc544\ub798\ub294 \uc2e4\uc81c 1\ubd80\ud130 N\uae4c\uc9c0\uc758 \ud569\uc744 \ud544\uc694\ub85c \ud558\ub294 \ubcf5\uc7a1\ud55c \uc5f0\uc0b0\uc744 \uc2e4\uc81c\ub85c \uc218\ud589\ud558\ub294 \ucf54\ub4dc\uc774\ub2e4.<\/p>\n
\r\npackage pattern;\r\n\r\npublic class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tCalculator cal1 = new Calculator(new SimpleNSumStrategy()); \r\n\t\tCalculator cal2 = new Calculator(new GaussSumStrategy());\r\n\t\t\r\n\t\tdouble result1 = cal1.run(10000000);\r\n\t\tdouble result2 = cal2.run(10000000);\r\n\t\t\r\n\t\tSystem.out.println(result1 + \" \" + result2);\r\n\t\t\r\n\t}\r\n}\r\n<\/pre>\n
\ubcf5\uc7a1\ud55c \uc5f0\uc0b0 \uc911 \uc77c\ubd80\ubd84\uc778 1\ubd80\ud130 N\uae4c\uc9c0\uc758 \ud569\uc744 \uad6c\ud558\ub294 \ubc29\uc2dd\uc744 \ubd84\ub9ac\ud558\uc5ec \uc27d\uac8c \uad50\uccb4\uac00 \uac00\ub2a5\ud55c \uac83\uc744 \ubcfc \uc218 \uc788\ub2e4.<\/p>\n
\uc774 \uae00\uc740 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc124\uacc4\uc758 \uae30\ubc18\uc774 \ub418\ub294 GoF\uc758 \ub514\uc790\uc778\ud328\ud134\uc5d0 \ub300\ud55c \uac15\uc758\uc790\ub8cc\uc785\ub2c8\ub2e4. \uc644\uc804\ud55c \uc2e4\uc2b5\uc744 \uc704\ud574 \uc774 \uae00\uc5d0\uc11c \uc18c\uac1c\ud558\ub294 \ud074\ub798\uc2a4 \ub2e4\uc774\uc5b4\uadf8\ub7a8\uacfc \uc608\uc81c \ucf54\ub4dc\ub294 \uc644\uc804\ud558\uac8c \uc2e4\ud589\ub418\ub3c4\ub85d \uc81c\uacf5\ub418\uc9c0\ub9cc, \uc0c1\ub300\uc801\uc73c\ub85c \uc608\uc81c \ucf54\ub4dc\uc640 \uad00\ub828\ub41c \uc124\uba85\uc774 \ud568\ucd95\uc801\uc73c\ub85c \uc81c\uacf5\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uae00\uc5d0 \ub300\ud574 \uad81\uae08\ud55c \uc810\uc774 \uc788\uc73c\uba74 \ub313\uae00\uc744 \ud1b5\ud574 \ub0a8\uaca8\uc8fc\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/div>\n","protected":false},"excerpt":{"rendered":"
\ud328\ud134\uba85\uce6d Strategy \ud544\uc694\ud55c \uc0c1\ud669 \ubcc0\uacbd\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc740 \uc5b4\ub5a4 \uc54c\uace0\ub9ac\uc998\uc744 \uc27d\uace0 \ud6a8\uacfc\uc801\uc73c\ub85c \uad50\uccb4\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\ub294 \ud328\ud134\uc774\ub2e4. \uc608\uc81c \ucf54\ub4dc \uc608\uc2dc\ub97c \uc704\ud574 \uc774 \uae00\uc5d0\uc11c\ub294 \ubcc0\uacbd\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc740 \uc54c\uace0\ub9ac\uc998\uc744 1\ubd80\ud130 N\uae4c\uc9c0\uc758 \ud569\uacc4\ub97c \uad6c\ud558\ub294 \uac83\uc73c\ub85c \ud55c\ub2e4. \uc704\uc758 \ud074\ub798\uc2a4 \ub2e4\uc774\uc5b4\uadf8\ub7a8\uc5d0\uc11c NSumStrategy\ub294 \uc774 \uc54c\uace0\ub9ac\uc998\uc758 \uc5f0\uc0b0 \uacb0\uacfc\ub97c \uc5bb\uae30 \uc704\ud55c \uc778\ud130\ud398\uc774\uc2a4\ub9cc\uc744 \uc815\uc758\ud558\ub294 \uc778\ud130\ud398\uc774\uc2a4\uc774\uba70 Strategy \ud328\ud134\uc758 \ud575\uc2ec\uc774\ub2e4. \ucf54\ub4dc\ub294 \uc544\ub798\uc640 \uac19\ub2e4. package pattern; public interface … <\/p>\n
\ub354 \ubcf4\uae30 “[GoF] Strategy \ud328\ud134”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-10382","post","type-post","status-publish","format-standard","hentry","category-design"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/10382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10382"}],"version-history":[{"count":7,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/10382\/revisions"}],"predecessor-version":[{"id":10571,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/10382\/revisions\/10571"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10382"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}