{"id":1333,"date":"2011-09-06T14:28:01","date_gmt":"2011-09-06T05:28:01","guid":{"rendered":"http:\/\/www.webcyou.com\/?p=1333"},"modified":"2012-02-10T02:20:00","modified_gmt":"2012-02-09T17:20:00","slug":"javascript-%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e5%9f%ba%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/www.webcyou.com\/?p=1333","title":{"rendered":"JavaScript \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c"},"content":{"rendered":"

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7c21\u5358\u306a\u8003\u3048\u65b9<\/strong><\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f \u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\u300c\u30c7\u30fc\u30bf\u3092\u6301\u3063\u3066\u3044\u3066\u3001\u64cd\u4f5c\u306e\u5bfe\u8c61\u3068\u306a\u308b\u30e2\u30ce\u300d<\/p>\n

\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u6570\u3092\u6301\u305f\u305b\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30c7\u30fc\u30bf\u3068\u306a\u308a
\n \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u6570\u3092\u6301\u305f\u305b\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u64cd\u4f5c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u6570\u2192\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u6570\u2192\u30e1\u30bd\u30c3\u30c9<\/strong><\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u8a08\u56f3\u306e\u3053\u3068\u3092\u30af\u30e9\u30b9\u8a2d\u8a08\u3092\u5143\u306b\u3057\u3066\u4f5c\u6210\u3057\u305f\u5404\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3053\u3068\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n

ECMAScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong><\/th>\n\u6a5f\u80fd<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Object<\/td>\n\u4e00\u822c\u7684\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td>\n<\/tr>\n
String<\/td>\n\u6587\u5b57\u5217\u7528\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td>\n<\/tr>\n
Number<\/td>\n\u6570\u5024\u7528\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td>\n<\/tr>\n
Boolean<\/td>\n\u8ad6\u7406\u5024\u7528\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td>\n<\/tr>\n
Array<\/td>\n\u914d\u5217\u306e\u64cd\u4f5c<\/td>\n<\/tr>\n
Date<\/td>\n\u65e5\u4ed8\u3068\u6642\u9593\u3092\u6271\u3046<\/td>\n<\/tr>\n
Math<\/td>\n\u6570\u5b66\u95a2\u6570\u3084\u5b9a\u6570\u3092\u542b\u3080<\/td>\n<\/tr>\n
Function<\/td>\n\u95a2\u6570\u3092\u4f5c\u6210\u3059\u308b<\/td>\n<\/tr>\n
RegExp<\/td>\n\u6b63\u898f\u8868\u73fe\u3092\u6271\u3046<\/td>\n<\/tr>\n
Error<\/td>\n\u4f8b\u5916\uff08\u30a8\u30e9\u30fc\uff09\u3092\u8868\u3059<\/td>\n<\/tr>\n
\u30b0\u30ed\u30fc\u30d0\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td>\n\u3059\u3079\u3066\u306e\u5909\u6570\u3084\u95a2\u6570\u306e\u89aa\u3068\u306a\u308b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9
\n <\/strong>
\n \u5b9f\u969b\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u306b\u306fnew \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d()\u3068\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u3092\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n

\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u306f\u3001\u95a2\u6570\u306e\u3088\u3046\u306b\u5f15\u6570\u306e\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

str = new String(“\u306f\u3058\u3081\u307e\u3057\u3066!”);<\/p>\n

\u4e0a\u8a18\u306e\u4f8b\u306e\u3088\u3046\u306bStrong\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\u3068\u300c\u306f\u3058\u3081\u307e\u3057\u3066!\u300d<\/p>\n

\u3068\u3044\u3046\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u3092\u6301\u3064\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u4f5c\u6210\u3055\u308c<\/p>\n

\u5909\u6570str\u306f\u305d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53c2\u7167\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\uff08\u4ee3\u5165\u3067\u306f\u306a\u3044\u3002\u53c2\u7167\uff09<\/strong><\/p>\n

\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u4f5c\u6210\u3059\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u30d7\u30ed\u30d1\u30c6\u30a3\u304b\u3089\u5024\u3092\u53d6\u5f97\u3059\u308b\u3068\u304d\u306b\u306f\u300c.\u300d\u3092\u4f7f\u3044\u300c\u5909\u6570\u540d.\u30d7\u30ed\u30d1\u30c6\u30a3\u300d<\/strong><\/p>\n

len = str.length;<\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306f\u300c . \u300d\u3092\u4f7f\u3044\u300c\u5909\u6570\u540d.\u30e1\u30bd\u30c3\u30c9()\u300d<\/strong><\/p>\n

ch = str.charAt(2);<\/p>\n

\u300c.\u300d\u306f\u300c\u306e\u300d\u3068\u8aad\u3080\u3068\u3044\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u300cstr\u306elength\u30d7\u30ed\u30d1\u30c6\u30a3\u300d\u300cstr\u306echarAt\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3002\u300d<\/strong><\/p>\n

\u3053\u306e\u3088\u3046\u306a\u8003\u3048\u3067\u8a18\u8ff0\u3057\u3066\u3044\u3051\u3070\u3001\u611f\u899a\u7684\u306b\u7406\u89e3\u3057\u3066\u3044\u3051\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u3067\u306f\u3001\u6587\u5b57\u306e\u9577\u3055\u3068\u629c\u304d\u51fa\u3057\u3092\u884c\u3046\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u3059\u3002<\/p>\n

<script type="text\/javascript">\r\nstr = new String("\u306f\u3058\u3081\u307e\u3057\u3066"); \/\/String\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\r\nlen = str.length;\r\ndocument.write("\u6587\u5b57\u5217\u306e\u9577\u3055\u306f\u3001" + len + "\u3067\u3059\u3002\r\n");\r\nch = str.charAt (2);\r\ndocument.write("3\u756a\u76ee\u306e\u6587\u5b57\u306f\u3001\u300c" + ch + "\u300d\u3067\u3059\u3002");\r\n<\/script>\r\n<\/pre>\n<\/p>\n
\u6587\u5b57\u5217\u306e\u9577\u3055\u306f\u30016\u3067\u3059\u3002<\/p>\n
3\u756a\u76ee\u306e\u6587\u5b57\u306f\u3001\u300c\u3081\u300d\u3067\u3059\u3002<\/p>\n
length(); \u6587\u5b57\u306e\u9577\u3055\u3092\u6c42\u3081\u307e\u3059<\/strong><\/p>\n
charAt(); \u6307\u5b9a\u4f4d\u7f6e\u306e1\u6587\u5b57\u3092\u629c\u304d\u51fa\u3057\u307e\u3059\u3002<\/strong><\/p>\n
\u30d6\u30e9\u30a6\u30b6\u30fc\u3067\u64cd\u4f5c\u3059\u308bJavaScript\u3067\u306f\u3001<\/p>\n
\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u8868\u3059 window\u3084HTML\u6587\u66f8\u3092\u8868\u3059document\u3082\u4f7f\u7528\u3067\u304d\u308b\u3002
\n \u3053\u308c\u3089\u306f\u30b3\u30f3\u30b9\u30bf\u30e9\u30af\u30bf\u3067\u4f5c\u6210\u3057\u306a\u304f\u3066\u3082\u3001\u3042\u3089\u304b\u3058\u3081\u4f5c\u6210\u3055\u308c\u3066\u308b\u306e\u3067\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092
\n \u305d\u306e\u307e\u307e\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n
document.write\u306fDocument\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ewrite\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7c21\u5358\u306a\u8003\u3048\u65b9 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f \u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\u300c\u30c7\u30fc\u30bf\u3092\u6301\u3063\u3066\u3044\u3066\u3001\u64cd\u4f5c\u306e\u5bfe\u8c61\u3068\u306a\u308b\u30e2\u30ce\u300d \u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u6570\u3092\u6301\u305f\u305b\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30c7\u30fc\u30bf\u3068\u306a\u308a \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u6570\u3092\u6301\u305f\u305b\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u64cd […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[47,46],"class_list":["post-1333","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-javascript-2","tag-js"],"_links":{"self":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/1333","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1333"}],"version-history":[{"count":25,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/1333\/revisions"}],"predecessor-version":[{"id":2932,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/1333\/revisions\/2932"}],"wp:attachment":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}