{"id":346,"date":"2015-08-17T03:11:18","date_gmt":"2015-08-17T03:11:18","guid":{"rendered":"http:\/\/ta.onionmixer.net\/wordpress\/?p=346"},"modified":"2015-08-17T03:11:18","modified_gmt":"2015-08-17T03:11:18","slug":"design-pattern-for-smalltalk-state","status":"publish","type":"post","link":"http:\/\/ta.onionmixer.net\/wordpress\/?p=346","title":{"rendered":"Design Pattern for Smalltalk &#8211; State"},"content":{"rendered":"<p><a href=\"http:\/\/ta.onionmixer.net\/wordpress\/?attachment_id=347\" rel=\"attachment wp-att-347\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_State_01.jpg\" alt=\"t_Dpsc_chapter05_State_01\" width=\"800\" height=\"321\" class=\"alignnone size-full wp-image-347\" srcset=\"http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_State_01.jpg 800w, http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_State_01-480x193.jpg 480w, http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_State_01-300x120.jpg 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/p>\n<p>\ub514\uc790\uc778 \ud328\ud134\uc740 \uba87\uac00\uc9c0\ub85c \ubd84\ub958\ub41c\ub2e4. \uc0dd\uc131,\uad6c\uc870,\ud589\uc704 \uc758 3\uac00\uc9c0\uac00 \uadf8\uac83\uc778\ub370 \ud2b9\ud788 \ud589\uc704(behaviord) \ud328\ud134\uc5d0 \uc18d\ud558\ub294 \ud328\ud134\ub4e4\uc740 \uac1d\uccb4\ub4e4 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \ud1b5\ud574 \uc5b4\ub5a4 \uacb0\uacfc\uac00 \uc77c\uc5b4\ub098\ub294\uc9c0\uc5d0 \ucd08\uc810\uc774 \ub9de\ucdb0\uc838 \uc788\ub2e4. State \ud328\ud134\ub3c4 \uadf8 \uc911 \ud558\ub098\uc774\ub2e4. State \ud328\ud134\uc740 \uc774\ub984 \uadf8\ub300\ub85c &#8220;\uc0c1\ud0dc&#8221;\ub97c \uac1d\uccb4\ub85c \ud45c\ud604\ud558\ub294 \uac83\uc774 \ubaa9\uc801\uc774\ub2e4. \ud558\uc9c0\ub9cc \uc911\uc694\ud55c \uac83\uc740 &#8220;\uc65c \uc0c1\ud0dc\ub97c \uc0c1\uc218\uac00 \uc544\ub2cc \uad73\uc774 \uac1d\uccb4\ub85c \uc815\uc758\ud558\ub294\uac00&#8221;\uc5d0 \ub300\ud55c \uac83\uacfc &#8220;\uc774\ub807\uac8c \uc815\uc758 \ub41c \uc0c1\ud0dc\ub294 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ub418\ub294\uac00&#8221;\uc815\ub3c4\uac00 \ub420 \uac83\uc774\ub2e4.<\/p>\n<p>State \ud328\ud134\uc758 \ub0b4\uc6a9\uc744 \uac04\ub7b5\ud558\uac8c \uc815\ub9ac\ud574\ubcf4\uc790.<\/p>\n<p>1. Client \ub294 context\uc640 \uc791\uc5c5\ud55c\ub2e4.<br \/>\n2.context \ub0b4\ubd80\uc5d0\uc11c\ub294 \uc5b8\uc81c\ub098 \ub3d9\uc77c\ud55c \uac1c\ub150\uc73c\ub85c State \uc778\uc2a4\ud134\uc2a4\ub97c \ub2e4\ub8ec\ub2e4. (ex: state :: Open ( ) \ud638\ucd9c \ub4f1)<br \/>\n3. context \ub0b4\ubd80\uc5d0\uc11c \uad00\ub9ac\ub418\ub294 State\uc758 \uc778\uc2a4\ud134\uc2a4\uac00 \uc0c1\ud669\uc5d0 \ub9de\uac8c \uad50\uccb4\ub418\uae30 \ub54c\ubb38\uc5d0 open \uba54\uc11c\ub4dc\uc758 \ub3d9\uc791\uacb0\uacfc\ub294 \ubc14\ub00c\uac8c \ub41c\ub2e4.<\/p>\n<p>\uc774\ub7f0 State\uc758 \ub3d9\uc791\uc6d0\uce59 \ub355\ubd84\uc5d0 context \uac1d\uccb4\uc758 \ub0b4\ubd80\uc5d0\uc11c\ub294 \uba54\uc138\uc9c0\ub97c \ub2e4\ub8e8\ub294 \uc791\uc5c5\uc5d0 \ub300\ud55c \uc77c\uad00\uc131\uc744 \ud655\ubcf4\ud558\uac8c \ub41c\ub2e4.<\/p>\n<p>State \ud074\ub798\uc2a4\uc758 \ucd94\uc0c1\ud074\ub798\uc2a4\ud654\ub97c \ud1b5\ud55c State\uc758 \ub2e4\uc591\ud55c \uc0c1\ud0dc\ub97c \uc218\ud3c9\uc801\uc73c\ub85c \ub298\uc77c \uc218 \uc788\ub2e4. State\uac00 \ud45c\ud604\ud574\uc57c \ud558\ub294 \uac01 \uc0c1\ud0dc\ub97c \uc0c1\uc218\ub85c \uc815\uc758\ud558\uba74 context \uac1d\uccb4 \ub0b4\ubd80\uc5d0\ub294 \uc0c1\uc218\uac12\uc744 \ud310\ubcc4\ud574\uc11c \ub3d9\uc791\ud558\ub294 \ub0b4\ubd80\uc870\uc9c1\uc774 \uc9c1\uc811 \uad6c\ud604\ub418\uc5b4 \uc788\uc5b4\uc57c\ub9cc \ud55c\ub2e4.<\/p>\n<p>\ud558\uc9c0\ub9cc State \uac1d\uccb4\ub97c \uc4f0\uba74 \uc0c1\ud0dc\uc5d0 \ub530\ub978 \ub3d9\uc791\uc744 State \ud074\ub798\uc2a4\uad70\uc5d0\uc11c \ucc45\uc784\uc9c0\uae30 \ub54c\ubb38\uc5d0 \uc0c1\ud0dc\ubcc4 \ub3d9\uc791\uc5d0 \ub530\ub978 \ucf54\ub4dc\ub97c \uc0c8\ub85c\uc6b4 Context \ub9c8\ub2e4 \ubcf5\uc0ac\ud574\uc11c \uc0ac\uc6a9\ud558\ub294 \ub300\uc2e0\uc5d0, \uc7ac\uc0ac\uc6a9\uc744 \uc27d\uac8c\ud558\uba70 \uc0c1\ud0dc\ubcc4 \ub3d9\uc791\uc5d0 \ub300\ud55c \ucf54\ub4dc\uc758 \uc720\uc9c0\ubcf4\uc218\ub97c \ubcf4\ub2e4 \uc27d\uac8c \ud560 \uc218 \uc788\ub2e4. State\uc758 \ud558\uc704 \uc778\uc2a4\ud134\uc2a4\ub294 \uadf8 \uc790\uccb4\ub85c \uc0c1\ud0dc\uc758 \ud0c0\uc785\uc744 \uc758\ubbf8\ud558\uae30 \ub54c\ubb38\uc5d0 State\uc758 \uc778\uc2a4\ud134\uc2a4\uc5d0\uac8c \ub3d9\uc801\uc778 \ub9ac\uc18c\uc2a4\ub97c \uac00\uc9c0\uace0 \uc788\uac8c \uad6c\uc870\ub97c \ub9cc\ub4dc\ub294 \uac83\uc740 \ud53c\ud558\ub3c4\ub85d \ud558\ub2e4. Context\uc778\uc2a4\ud134\uc2a4 \ub0b4\ubd80\uc5d0\uc11c \uad00\ub9ac\ub418\ub294 State \ubcc0\uc218\uc758 \uc778\uc2a4\ud134\uc2a4 \uad50\ud658\/\uad00\ub9ac\ub294 context\uc758 \ubaab\uc774\uc9c0\ub9cc State \ud074\ub798\uc2a4\uad70\uc5d0 \uc0c1\ud0dc\ubcc4 \uaddc\uce59\uc744 \ub123\uc5b4 State\uc758 \ud558\uc704 \ud074\ub798\uc2a4\ub4e4\uac04\uc5d0 \uc11c\ub85c \uc0c1\ud638\uc791\uc6a9\ud558\uba70 \ubc18\uc751\ud558\uac8c \ud560 \uc218 \uc788\ub2e4\uba74 \ubcf4\ub2e4 \uc88b\uc740 \uad6c\ud604\uc774 \ub420 \uac83\uc774\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub514\uc790\uc778 \ud328\ud134\uc740 \uba87\uac00\uc9c0\ub85c \ubd84\ub958\ub41c\ub2e4. \uc0dd\uc131,\uad6c\uc870,\ud589\uc704 \uc758 3\uac00\uc9c0\uac00 \uadf8\uac83\uc778\ub370 \ud2b9\ud788 \ud589\uc704(behaviord) \ud328\ud134\uc5d0 \uc18d\ud558\ub294 \ud328\ud134\ub4e4\uc740 \uac1d\uccb4\ub4e4 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \ud1b5\ud574 \uc5b4\ub5a4 \uacb0\uacfc\uac00 \uc77c\uc5b4\ub098\ub294\uc9c0\uc5d0 \ucd08\uc810\uc774 \ub9de\ucdb0\uc838 \uc788\ub2e4. State \ud328\ud134\ub3c4 \uadf8 \uc911 \ud558\ub098\uc774\ub2e4. State \ud328\ud134\uc740 \uc774\ub984 \uadf8\ub300\ub85c &#8220;\uc0c1\ud0dc&#8221;\ub97c \uac1d\uccb4\ub85c \ud45c\ud604\ud558\ub294 \uac83\uc774 \ubaa9\uc801\uc774\ub2e4. \ud558\uc9c0\ub9cc \uc911\uc694\ud55c \uac83\uc740 &#8220;\uc65c \uc0c1\ud0dc\ub97c \uc0c1\uc218\uac00 \uc544\ub2cc \uad73\uc774 \uac1d\uccb4\ub85c \uc815\uc758\ud558\ub294\uac00&#8221;\uc5d0 \ub300\ud55c \uac83\uacfc &#8220;\uc774\ub807\uac8c \uc815\uc758 \ub41c \uc0c1\ud0dc\ub294 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ub418\ub294\uac00&#8221;\uc815\ub3c4\uac00 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74],"tags":[],"_links":{"self":[{"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/346"}],"collection":[{"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=346"}],"version-history":[{"count":1,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/346\/revisions"}],"predecessor-version":[{"id":348,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/346\/revisions\/348"}],"wp:attachment":[{"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=346"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}