{"id":469,"date":"2021-09-17T15:22:52","date_gmt":"1970-01-01T00:00:00","guid":{"rendered":"http:\/\/swift.tecc0.com\/?p=469"},"modified":"2021-09-17T15:22:52","modified_gmt":"1970-01-01T00:00:00","slug":"post-469","status":"publish","type":"post","link":"https:\/\/swift.tecc0.com\/?p=469","title":{"rendered":"Swift\u3067\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u8abf\u3079\u308b\u65b9\u6cd5(isEmpty)"},"content":{"rendered":"<p>Swift\u3067\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u306b\u306f <strong>isEmpty<\/strong> \u3092\u4f7f\u3046\u3068\u826f\u3044\u3088\u3002<\/p>\n<h3>Swift\u3067\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b<\/h3>\n<pre class=\"lang:swift decode:true\">let str1 = \"\"\nlet str2 = \"swift\"\n\nprint(str1.isEmpty) \/\/ true\nprint(str2.isEmpty) \/\/ false<\/pre>\n<p>\u3053\u3093\u306a\u611f\u3058\u3067\u6587\u5b57\u5217\u304c\u7a7a\u306e\u5834\u5408\u306f\u3001true\u304c\u8fd4\u3063\u3066\u304f\u308b\u3088\u3002<\/p>\n<p>\u3088\u304f\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092if\u6587\u3067\u5224\u65ad\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3068\u601d\u3046\u3051\u3069\u3001\u4ee5\u4e0b\u307f\u305f\u3044\u306b\u66f8\u3051\u308b\u3088\u3002<\/p>\n<h3>if\u6587\u3067\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b<\/h3>\n<pre class=\"lang:swift decode:true \">if str1.count == 0 {\n    print(\"empty!!\")\n}\n\nif str1 == \"\" {\n    print(\"empty!!\")\n}\n\nif str1.isEmpty {\n    print(\"empty!!\")\n}<\/pre>\n<p>\u3053\u3093\u306a\u611f\u3058\u3067\u3044\u304f\u3064\u304b\u3067\u304d\u308b\u3063\u3061\u3083\u3067\u304d\u308b\u3051\u3069\u3001\u00a0<strong>isEmpty<\/strong> \u3092\u4f7f\u3063\u305f\u307b\u3046\u304c\u53ef\u8aad\u6027\u304c\u826f\u3044\u306e\u3067\u3001isEmpty\u3092\u4f7f\u3046\u7656\u3092\u3064\u3051\u3088\u3046\u3002<\/p>\n<h4>\u304a\u307e\u3051: nil\u306e\u5834\u5408\u306f\uff1f<\/h4>\n<p>\u3061\u306a\u307f\u306b\u4ed6\u8a00\u8a9e\u304b\u3089\u6d41\u308c\u3067\u3044\u3046\u3068\u3001<strong>nil\u306e\u5834\u5408\u306f\u3069\u3046\u306a\u308b\u306e\uff1f<\/strong>\u3063\u3066\u7591\u554f\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3051\u3069\u3001\u305d\u3082\u305d\u3082String\u578b\u306bnil\u306e\u4ee3\u5165\u306f\u8a31\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u3001Optional\u578b\u306b\u306a\u308b\u3002<\/p>\n<p>\u306a\u306e\u3067\u3001isEmpty\u3092\u305d\u3082\u305d\u3082\u4f7f\u3048\u306a\u3044(nil\u3060\u3068\u30a2\u30f3\u30e9\u30c3\u30d7\u3082\u3067\u304d\u306a\u3044)\u3001\u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u30c1\u30a7\u30fc\u30f3\u3092\u4f7f\u3063\u3066\u3082nil\u304c\u8fd4\u3063\u3066\u304f\u308b\u3060\u3051\u306a\u306e\u3067\u610f\u5473\u304c\u306a\u3044\u3002<\/p>\n<p>\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3088\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Swift\u3067\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u306b\u306f isEmpty \u3092\u4f7f\u3046\u3068\u826f\u3044\u3088\u3002 Swift\u3067\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b let str1 = &#8220;&#8221; let str2 = &#8220;swift&#8221; print(str1.isEmpt&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=\/wp\/v2\/posts\/469"}],"collection":[{"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=469"}],"version-history":[{"count":4,"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=\/wp\/v2\/posts\/469\/revisions"}],"predecessor-version":[{"id":858,"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=\/wp\/v2\/posts\/469\/revisions\/858"}],"wp:attachment":[{"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swift.tecc0.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}