{"id":340,"date":"2015-08-17T03:08:22","date_gmt":"2015-08-17T03:08:22","guid":{"rendered":"http:\/\/ta.onionmixer.net\/wordpress\/?p=340"},"modified":"2015-08-17T03:08:22","modified_gmt":"2015-08-17T03:08:22","slug":"design-pattern-for-smalltalk-memento","status":"publish","type":"post","link":"http:\/\/ta.onionmixer.net\/wordpress\/?p=340","title":{"rendered":"Design Pattern for Smalltalk &#8211; Memento"},"content":{"rendered":"<p><a href=\"http:\/\/ta.onionmixer.net\/wordpress\/?attachment_id=341\" rel=\"attachment wp-att-341\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_Memento_01.jpg\" alt=\"t_Dpsc_chapter05_Memento_01\" width=\"800\" height=\"251\" class=\"alignnone size-full wp-image-341\" srcset=\"http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_Memento_01.jpg 800w, http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_Memento_01-480x151.jpg 480w, http:\/\/ta.onionmixer.net\/wordpress\/wp-content\/uploads\/2015\/08\/t_Dpsc_chapter05_Memento_01-300x94.jpg 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/p>\n<p>Memento\ud328\ud134\uc740 \uae30\ub85d\uc5d0 \ub300\ud55c \ud328\ud134\uc774\ub2e4. \uae30\ub85d\uc774 \ud544\uc694\ud55c \uc774\uc720\ub294 \ubb34\uc5c7\uc77c\uae4c? \uae30\ub85d\uc744 \ucc38\uace0\ud574\uc57c\ud560 \ubb34\uc5b8\uac00\uac00 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. \uae30\ub85d\uc774 \uc874\uc7ac\ud568\uc73c\ub85c\uc11c \uacfc\uac70\uc758 \uc774\ub825\uc744 \uc0b4\ud3b4\ubcf4\uace0, \uadf8 \uacb0\uacfc\ub85c \ubb34\uc5b8\uac00 \ub2e4\ub978 \ud589\ub3d9\uc744 \ud560 \uc218\ub3c4 \uc788\ub2e4. \uc774 \uacbd\uc6b0 \ub2e4\ub978 \ud589\ub3d9\uc740 redo\/undo \uac00 \ub420 \uac83\uc774\ub2e4.<\/p>\n<p>\uc5ec\uae30\uc11c \uc7a0\uc2dc \uac1d\uccb4\uc9c0\ud5a5\uc758 3\ub300 \uc694\uc18c\ub97c \uc0dd\uac01\ud574\ubcf4\uc790. \uadf8\ub807\ub2e4! \uc0c1\uc18d\uc131, \ucea1\uc290\ud654, \ub2e4\ud615\uc131\uc774\ub2e4. Memento \ud328\ud134\uc774 \uc874\uc7ac\ud558\ub294 \uc774\uc720\ub97c \uc0dd\uac01\ud574\ubcf4\uc790. \uac1d\uccb4\uc758 \uae30\ubcf8\uc740 \uc790\uc2e0\uc758 \ub0b4\ubd80\uc0c1\ud0dc\ub97c \uc678\ubd80\uc5d0 \ub4dc\ub7ec\ub0b4\uc9c0 \uc54a\uace0 \ub3d9\uc791\ud558\ub294 \uac83\uc5d0 \uc788\ub2e4. redo\/undo \ub97c \uc704\ud574 \uc790\uc2e0\uc758 \uc0c1\ud0dc\ub97c \ud544\uc694\ud560 \ub54c \ub9c8\ub2e4 \uc678\ubd80\uc5d0\uc11c \uc811\uadfc \uac00\ub2a5\ud558\uac8c \ub4dc\ub7ec\ub0b4\ub294 \uac83\uc740 \ucea1\uc290\ud654\uc758 \uc6d0\uce59\uc5d0 \uc704\ubc30\ub41c\ub2e4. \uc774\ub7f0 \ud544\uc694 \ub355\ubd84\uc5d0 Memento\ud328\ud134\uc774 \uad6c\uc0c1\ub418\uc5c8\ub2e4. \uac1d\uccb4\uac00 \ud544\uc694\ud560 \ub54c \uc790\uc2e0\uc758 \uc0c1\ud0dc\ub97c \uc800\uc7a5\ud558\ub294 &#8220;\uc790\uc2e0 \uc804\uc6a9\uc758 \ubcc4\ub3c4 \ucc3d\uace0&#8221;\uc5d0 \ubcf4\uad00\ud558\uace0, \uc678\ubd80\uc5d0\uc11c\uc758 \uc694\uccad\uc774 \uc788\uc744 \ub54c \uc2a4\uc2a4\ub85c\uac00 \ucc3d\uace0\uc5d0 \uc811\uadfc\ud574\uc11c \ud544\uc694\ud55c \uc815\ubcf4\ub97c \uc6a9\ub3c4\uc5d0 \ub9de\uac8c \uc0ac\uc6a9\ud558\uba74 \ub41c\ub2e4.<\/p>\n<p>originator\uc758 Memento class \ub294 \ub0b4\ubd80\uc801\uc73c\ub85c command \ud328\ud134 (status\uc758 \ud788\uc2a4\ud1a0\ub9ac \ubaa9\ub85d\uc744 \uc720\uc9c0)\uc744 \uad6c\ud604\ud558\uace0, \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158 \uc804\uccb5\uc801\uc73c\ub85c command \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774 \uc804\uccb4\uc801 \ud328\ud134\uc5d0 Originator\uc5d0 \ub300\ud55c \ud788\uc2a4\ud1a0\ub9ac\ub97c \ub0a8\uaca8\uc11c \uad00\ub9ac\ud558\uba74 \uc11c\ub85c\uc758 \uac04\uc12d\uc774 \uc801\uc740 redo\/undo\ub97c \uad6c\ud604 \ud560 \uc218 \uc788\ub2e4. originator\uc758 memento\uc778\uc2a4\ud134\uc2a4 \ub0b4\ubd80\uc5d0\uc11c\ub294 \ub370\uc774\ud130\ub97c collection\uc73c\ub85c \uad00\ub9ac\ud55c\ub2e4\uace0 \ud588\uc744 \ub54c, originator\uc758 \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 memento\uc758 \uc778\uc2a4\ud134\uc2a4\ub97c \uc778\uc2dd\ud560 \uc218 \uc5c6\uae30 \ub54c\ubb38\uc5d0 \ucea1\uc290\ud654\uac00 \uc704\ubc30\ub418\ub294 \uacbd\uc6b0\ub97c \ube44\uaef4\uac00\ub294\ub370\ub3c4 \uc720\uc6a9\ud558\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Memento\ud328\ud134\uc740 \uae30\ub85d\uc5d0 \ub300\ud55c \ud328\ud134\uc774\ub2e4. \uae30\ub85d\uc774 \ud544\uc694\ud55c \uc774\uc720\ub294 \ubb34\uc5c7\uc77c\uae4c? \uae30\ub85d\uc744 \ucc38\uace0\ud574\uc57c\ud560 \ubb34\uc5b8\uac00\uac00 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. \uae30\ub85d\uc774 \uc874\uc7ac\ud568\uc73c\ub85c\uc11c \uacfc\uac70\uc758 \uc774\ub825\uc744 \uc0b4\ud3b4\ubcf4\uace0, \uadf8 \uacb0\uacfc\ub85c \ubb34\uc5b8\uac00 \ub2e4\ub978 \ud589\ub3d9\uc744 \ud560 \uc218\ub3c4 \uc788\ub2e4. \uc774 \uacbd\uc6b0 \ub2e4\ub978 \ud589\ub3d9\uc740 redo\/undo \uac00 \ub420 \uac83\uc774\ub2e4. \uc5ec\uae30\uc11c \uc7a0\uc2dc \uac1d\uccb4\uc9c0\ud5a5\uc758 3\ub300 \uc694\uc18c\ub97c \uc0dd\uac01\ud574\ubcf4\uc790. \uadf8\ub807\ub2e4! \uc0c1\uc18d\uc131, \ucea1\uc290\ud654, \ub2e4\ud615\uc131\uc774\ub2e4. Memento \ud328\ud134\uc774 \uc874\uc7ac\ud558\ub294 \uc774\uc720\ub97c \uc0dd\uac01\ud574\ubcf4\uc790. \uac1d\uccb4\uc758 \uae30\ubcf8\uc740 \uc790\uc2e0\uc758 \ub0b4\ubd80\uc0c1\ud0dc\ub97c \uc678\ubd80\uc5d0 \ub4dc\ub7ec\ub0b4\uc9c0 [&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\/340"}],"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=340"}],"version-history":[{"count":1,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/340\/revisions"}],"predecessor-version":[{"id":342,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/340\/revisions\/342"}],"wp:attachment":[{"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=340"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ta.onionmixer.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}