{"id":1510,"date":"2021-07-31T18:45:06","date_gmt":"2021-07-31T09:45:06","guid":{"rendered":"http:\/\/leenux.kr\/?p=1510"},"modified":"2021-08-02T19:52:08","modified_gmt":"2021-08-02T10:52:08","slug":"flutter-nullsafety","status":"publish","type":"post","link":"https:\/\/leenux.kr\/?p=1510","title":{"rendered":"[Flutter] NullSafety"},"content":{"rendered":"\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p class=\"has-text-color has-medium-font-size has-very-dark-gray-color\"><strong>Flutter 2.0 \ubc84\uc804\uc774 \uc62c\ub77c\uc624\uba74\uc11c \ud50c\ub7ec\ud130\uc5d0\uc11c NullSasfety\ub77c\ub294 \uae30\ub2a5\uc744 \uc9c0\uc6d0\ud55c\ub2e4.<br>NullSafety\ub294 \uc548\uc804\uc131\uc744 \ubcf4\uc7a5\ud55c \uc0c1\ud0dc\ub85c \uac1c\ubc1c\ub418\uac8c \uc9c4\ud589\ud558\ub294 \uae30\ub2a5\uc774\ub2e4.<br>NullSafety\ub97c \uc9c0\uc6d0\ud558\uc9c0 \uc54a\ub294 \uc5b8\uc5b4\ub4e4\uc740 \uac1d\uccb4 \uc0dd\uc131\ub584 null\uac12\uc774 \ub300\uc785\uc774 \uac00\ub2a5\ud558\uba70 null \uc0c1\ud0dc\uc758 \uac1d\uccb4\uc5d0 \uba64\ubc84 \uc811\uadfc\uc744 \ud558\uac8c \ub418\uba74 NPE \uc5d0\ub7ec(Runtime Error)\uac00 \ubc1c\uc0dd\ud55c\ub2e4.<\/strong><br><strong>\uadf8\ub798\uc11c NullSafety\ub97c \uc9c0\uc6d0\ud558\uac8c \ub418\uba74 \ucef4\ud30c\uc77c\ub7ec\uac00 NPE \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uac00\ub2a5\uc131\uc744 \uccb4\ud06c\ud574 NPE \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc5c6\ub294 \ucf54\ub4dc\ub97c \uc791\uc131\ud560 \uc218 \ubc16\uc5d0 \ub9cc\ub4e0\ub2e4.<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size has-very-dark-gray-color\"><strong>NullSafety\ub294 \uae30\ubcf8\uc801\uc73c\ub85c Nullable\uacfc Non-Nullable\ub85c \uad6c\ubd84\ub418\uba70 \ucef4\ud30c\uc77c\ub7ec\uc5d0\uac8c \ud574\ub2f9 \ubcc0\uc218\uc5d0 Null\uac12\uc774 \ub300\uc785\ud560 \uc218 \uc788\ub294\uc9c0 \uc5c6\ub294\uc9c0 \uc54c\ub824\uc8fc\ub294 \uac83\uc774\ub2e4. <\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p class=\"has-text-color has-medium-font-size has-very-dark-gray-color\"><strong>NullSafety<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>main(){\n  int a = null;\n  int? b = null;\n  print(a); \/\/\/ \uc5d0\ub7ec \ubc1c\uc0dd\n  print(b); \n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p class=\"has-text-color has-medium-font-size has-very-dark-gray-color\"><strong>Late <\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int a; \/\/\/ \ucef4\ud30c\uc77c \uc5d0\ub7ec \ubc1c\uc0dd\nlate int b; <\/code><\/pre>\n\n\n\n<p class=\"has-text-color has-medium-font-size has-very-dark-gray-color\"><strong>\ucf54\ub4dc\ub97c \uc791\uc131\ud560 \ub584 \uc9c0\uc5ed\ubcc0\uc218\uc5d0 \uac12\uc774 \uc5c6\ub294 \ubcc0\uc218\ub97c \uc120\uc5b8 \ud560 \ub584\uac00 \ub9ce\ub2e4, \uc774\ub7ec\ud55c \uacbd\uc6b0\uc5d0\ub294 \ubcc0\uc218 \ud0c0\uc785 \uc55e\uc5d0 &#8220;late&#8221;\ub77c\ub294 \ucf54\ub4dc\ub97c \ubd99\uc5ec\uc918\uc57c\ub418\ub294 NullSafety \uaddc\uce59\uc774\ub2e4.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Flutter] NullSafety<\/p>\n","protected":false},"author":1,"featured_media":1001,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[44,89,74,57],"_links":{"self":[{"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/posts\/1510"}],"collection":[{"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/leenux.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1510"}],"version-history":[{"count":4,"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/posts\/1510\/revisions"}],"predecessor-version":[{"id":1518,"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/posts\/1510\/revisions\/1518"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/leenux.kr\/index.php?rest_route=\/wp\/v2\/media\/1001"}],"wp:attachment":[{"href":"https:\/\/leenux.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leenux.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leenux.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}