{"id":9018,"date":"2020-09-04T07:31:37","date_gmt":"2020-09-03T22:31:37","guid":{"rendered":"http:\/\/pineplanter.moo.jp\/non-it-salaryman\/?p=9018"},"modified":"2025-08-13T21:00:50","modified_gmt":"2025-08-13T12:00:50","slug":"dart-list","status":"publish","type":"post","link":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/2020\/09\/04\/dart-list\/","title":{"rendered":"Dart: \u914d\u5217\u51e6\u7406\uff08List\uff09"},"content":{"rendered":"

Flutter\/Dart\u3067\u914d\u5217\u3092\u6271\u3046\u3053\u3068\u304c\u3042\u3063\u305f\u306e\u3067\u5099\u5fd8\u9332\u3068\u3057\u3066\u66f8\u304d\u7559\u3081\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n

 <\/p>\n

\u521d\u671f\u5316<\/h5>\n
\r\n\/\/\u521d\u671f\u5316(\u521d\u671f\u5024\u306a\u3057)\r\nvar list1 = []; \/\/\u578b\u5ba3\u8a00\u306a\u3057\r\n\/\/var list1 = List(); \/\/\u578b\u5ba3\u8a00\u306a\u3057\r\n\/\/List<int> list1 = []; \/\/\u578b\u5ba3\u8a00\u3042\u308a\r\n\r\nprint(list1); \/\/\u51fa\u529b: []\r\nlist1.add(1);\r\nlist1.add(2);\r\nprint(list1); \/\/\u51fa\u529b: [1, 2]\r\n\r\n\/\/\u9577\u30553\u3001\u30c7\u30fc\u30bf\u306e\u578b\u5ba3\u8a00\u306a\u3057(\u521d\u671f\u5024\u306a\u3057)\r\nvar list2 = []..length = 3; \/\/\u9577\u3055\u6307\u5b9a\u3042\u308a\r\nprint(list2); \/\/\u51fa\u529b: [null, null, null]\r\nlist2.add(4);\r\nprint(list2); \/\/\u51fa\u529b: [null, null, null, 4]\r\n \r\n<\/pre>\n
 <\/p>\n
 <\/p>\n
\u914d\u5217\u306b\u8ffd\u52a0<\/h5>\n
\r\n\/\/\u9577\u30553\u3001\u30c7\u30fc\u30bf\u306e\u578b\u5ba3\u8a00\u306a\u3057(\u521d\u671f\u5024\u3042\u308a)\r\nvar list3 = [1, 2, 3];\r\nprint(list3); \/\/\u51fa\u529b: [1, 2, 3]\r\nlist3.add(4);\r\nprint(list3); \/\/\u51fa\u529b: [1, 2, 3, 4]\r\n \r\n<\/pre>\n
 <\/p>\n
 <\/p>\n
2\u6b21\u5143\u914d\u5217<\/h5>\n
\r\nList<List<int>> list4 = [[11, 12, 13], [21, 22, 23], [31, 32, 33]];\r\nprint(list4); \/\/\u51fa\u529b: [[11, 12, 13], [21, 22, 23], [31, 32, 33]]\r\nprint(list4.length); \/\/\u51fa\u529b: 3\r\nlist4.insert(1, [0,1,2]);\r\nprint(list4); \/\/\u51fa\u529b: [[11, 12, 13], [0, 1, 2], [21, 22, 23], [31, 32, 33]]\r\nlist4.removeAt(2);\r\nprint(list4); \/\/\u51fa\u529b: [[11, 12, 13], [0, 1, 2], [31, 32, 33]]\r\nvar i = list4.indexOf([21, 22, 23]); \/\/1\r\nprint(1);\r\nvar j = list4[0].indexOf(13); \/\/2\r\nprint(j);\r\n\r\nList<String> list51 = ['a1', 'b1', 'c1'];\r\nList<String> list52 = ['a2', 'b2', 'c2'];\r\nList<String> list53 = ['a3', 'b3', 'c3'];\r\nList<Lis<String>> list5 = [list51, list52, list53];\r\nprint(list5);\r\n\/\/\u51fa\u529b: [[a1, b1, c1], [a2, b2, c2], [a3, b3, c3]]\r\n \r\n<\/pre>\n
 <\/p>\n
 <\/p>\n
\u7e70\u308a\u8fd4\u3057\u51e6\u7406<\/h5>\n
\r\nvar list6 = [1, 2, 3, 4, 5];\r\n\r\nfor (int i = 0; i &lt; list6.length; i++){\r\n  print(list6[i]);\r\n}\r\nlist6.forEach(\r\n  (int value){\r\n    print(value);\r\n});\r\n \r\n<\/pre>\n
 <\/p>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
Flutter\/Dart\u3067\u914d\u5217\u3092\u6271\u3046\u3053\u3068\u304c\u3042\u3063\u305f\u306e\u3067\u5099\u5fd8\u9332\u3068\u3057\u3066\u66f8\u304d\u7559\u3081\u3066\u304a\u304d\u307e … <\/p>\n","protected":false},"author":1,"featured_media":9019,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[],"class_list":["post-9018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dart-flutter"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/posts\/9018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/comments?post=9018"}],"version-history":[{"count":6,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/posts\/9018\/revisions"}],"predecessor-version":[{"id":12926,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/posts\/9018\/revisions\/12926"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/media\/9019"}],"wp:attachment":[{"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/media?parent=9018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/categories?post=9018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pineplanter.moo.jp\/non-it-salaryman\/wp-json\/wp\/v2\/tags?post=9018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}