{"id":1049,"date":"2021-12-18T07:59:00","date_gmt":"2021-12-17T22:59:00","guid":{"rendered":"http:\/\/kiyonagi.jp\/?p=1049"},"modified":"2022-10-31T16:55:20","modified_gmt":"2022-10-31T07:55:20","slug":"map%e3%81%a8filter%e3%81%ae%e3%82%a2%e3%83%ad%e3%83%bc%e9%96%a2%e6%95%b0%e5%88%a9%e7%94%a8","status":"publish","type":"post","link":"http:\/\/kiyonagi.jp\/?p=1049","title":{"rendered":"map\u3068filter\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u5229\u7528"},"content":{"rendered":"\n<p>filter \u306f where\u53e5\u3067\u300c\u9078\u629e\u300d\u306e\u64cd\u4f5c\u3001map\u304c select\u3059\u308b\u5bfe\u8c61\u5217\u3067\u300c\u5c04\u5f71\u300d\u306e\u64cd\u4f5c<br><br><code>var array = <strong>datalist<\/strong>.filter(value => <strong>value[\"prefecture\"] ==\"\u611b\u77e5\u770c\"<\/strong>).map(item => <strong>item[\"city\"]<\/strong>);<\/code><br><br>\u3053\u306e\u4f8b\u3060\u3068\u3001datalist\u304b\u3089\u300cprefecture\uff1d\u611b\u77e5\u770c\u300d\u306e\u300ccity\u300d\u306e\u30ea\u30b9\u30c8\u3067array\u3092\u4f5c\u3063\u3066\u308b\u3002<br>select city from datalist where prefecture = \u611b\u77e5\u770c \u3068\u3044\u3046\u3053\u3068\u3002<br><br>\u6065\u305a\u304b\u3057\u306a\u304c\u3089\u521d\u3081\u3066\u3061\u3083\u3093\u3068\u4f7f\u3063\u3066\u611f\u52d5\u3057\u305f\u3002<br>\u4eca\u56de\u3084\u3063\u3066\u308b\u4f5c\u696d\u306f\u3001jQuery\u306b\u983c\u3089\u305aES6\u3092\u304d\u3061\u3093\u3068\u7406\u89e3\u3057\u3066 Vanilla \u3067\u66f8\u304f\u3053\u3068\u304c\u91cd\u8981\u306a\u30df\u30c3\u30b7\u30e7\u30f3\u3060\u3063\u305f\u306e\u3067\u3001\u826f\u3044\u6a5f\u4f1a\u3068\u306a\u3063\u305f\u3002<br><br>\u4ed5\u4e8b\u3060\u3068\u3086\u3063\u304f\u308a\u8abf\u3079\u306a\u304c\u3089\u65b0\u3057\u3044\u8a18\u6cd5\u3092\u8a66\u3059\u3068\u3044\u3046\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u3001\u3042\u308b\u3044\u306f\u65e2\u5b58\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u904e\u53bb\u30bd\u30fc\u30b9\u306b\u5023\u3063\u3066\u4f5c\u308b\u5834\u5408\u304c\u591a\u304f\u3001\u305d\u3053\u306b\u500b\u4eba\u306e\u5b66\u7fd2\u610f\u6b32\u3084\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306f\u6c42\u3081\u3089\u308c\u3066\u306a\u3044\u3002<br>\u5927\u62b5\u306e\u3053\u3068\u306f\u6761\u4ef6\u5206\u5c90\u3068\u7e70\u308a\u8fd4\u3057\u6587\u3060\u3051\u3067\u5b9f\u88c5\u3067\u304d\u308b\u3057\u3001\u305d\u308c\u3089\u306e\u4f4e\u30ec\u30d9\u30eb\u306a\u547d\u4ee4\u306e\u7d44\u307f\u5408\u308f\u305b\u306e\u307b\u3046\u304c\u7d50\u679c\u7684\u306b\u9ad8\u901f\u3060\u3063\u305f\u308a\u3001\u90fd\u5408\u304c\u60aa\u3051\u308c\u3070\u5b9f\u88c5\u3092\u76f4\u305b\u308b\u308f\u3051\u3060\u304b\u3089\u3001\u305d\u308c\u3082\u60aa\u304f\u306f\u306a\u3044\u3002\uff08\u300c\u4f4e\u30ec\u30d9\u30eb\u300d\u3063\u3066\u306e\u306f\u3088\u308a\u6a5f\u68b0\u306b\u8fd1\u3044\u3068\u3044\u3046\u610f\u5473\u3067\uff09<br><br>\u305f\u3060\u3001\u305d\u306e\u4e21\u65b9\u3092\u4f7f\u3044\u3053\u306a\u305b\u3066\u3001\u9078\u629e\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u304c\u6211\u3005\u306e\u4fa1\u5024\u3067\u3042\u308b\u3068\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>filter \u306f where\u53e5\u3067\u300c\u9078\u629e\u300d\u306e\u64cd\u4f5c\u3001map\u304c select\u3059\u308b\u5bfe\u8c61\u5217\u3067\u300c\u5c04\u5f71\u300d\u306e\u64cd\u4f5c var array = datalist.filter(value => value[&#8220;prefecture&#8221;] ==&#8221;\u611b&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1049","post","type-post","status-publish","format-standard","hentry","category-4"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=\/wp\/v2\/posts\/1049","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1049"}],"version-history":[{"count":6,"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=\/wp\/v2\/posts\/1049\/revisions"}],"predecessor-version":[{"id":3166,"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=\/wp\/v2\/posts\/1049\/revisions\/3166"}],"wp:attachment":[{"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1049"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kiyonagi.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}