{"id":4200,"date":"2021-08-23T08:23:25","date_gmt":"2021-08-22T23:23:25","guid":{"rendered":"https:\/\/suzutukiblog.com\/?p=4200"},"modified":"2023-01-06T01:31:33","modified_gmt":"2023-01-05T16:31:33","slug":"javascript2-5","status":"publish","type":"post","link":"https:\/\/suzutukiblog.com\/index.php\/2021\/08\/23\/javascript2-5\/","title":{"rendered":"JavaScript\u5b66\u7fd2\u306e\u307e\u3068\u30812.5(\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3068\u30eb\u30fc\u30d7\u51e6\u7406)"},"content":{"rendered":"

2\u304b\u3089\u7d9a\u304d\u307e\u3059\u3002<\/a><\/p>\n

\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3068\u306f?<\/h3>\n

\u5f15\u6570\u306b\u6e21\u3059\u95a2\u6570\u3092callback\u95a2\u6570\u3068\u3044\u3046\u3002<\/p>\n

HTML\u306e\u8a18\u8ff0<\/h3>\n
\n
<!DOCTYPE html>\r\n<html lang=\"en\">\r\n<head>\r\n  <meta charset=\"UTF-8\">\r\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n  <meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\">\r\n<title>Document<\/title>\r\n<\/head>\r\n<body>\r\n  <h1>JavaScript\u306e\u57fa\u790e<\/h1>\r\n   <script src=\"main.js\"><\/script>\r\n<\/body>\r\n<\/html><\/code><\/pre>\n<\/div>\n
main.js\u306e\u8a18\u8ff0<\/h3>\n
\n
\/\/ \u3044\u3064\u3082\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\r\n\/\/ function hello(name) {\r\n\/\/ console.log(\"hello \" + name);\r\n\/\/ }\r\n\/\/ hello(\"Tanaka Tarou\");\r\n\r\n\/\/ callback\u306b\u95a2\u6570getname\u304c\u6e21\u308b(\u623b\u308a\u5024'Tanaka Tarou')\r\nfunction hello(callback, lastname) {\r\n\/\/ \u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081callback()\u3068\u3057\u3066\u3044\u308b\r\n console.log('hello ' + callback());\r\n }\r\n\/\/ \u5f15\u6570\u306b\u6e21\u3059\u95a2\u6570\u3092callback\u95a2\u6570\u3068\u3044\u3046\r\n function getFirstName() {\r\n return 'Tanaka';\r\n}\r\n function getName() {\r\n return 'Tanaka\u3000Tarou';\r\n}\r\n\r\n\/\/ \u95a2\u6570\u3092\u6e21\u3059\u3068\u623b\u308a\u5024'Tanaka Tarou'\u304c\u6e21\u308b\r\n hello(getFirstName);\r\n hello(getName); \r\n\/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u5f15\u6570\u3092\u6e21\u3057\u305f\u3044\u5834\u5408\u3001lastname\u306bAkina\u304c\u6e21\u3063\u3066\u304f\u308b\r\nfunction hello2(callback, lastname) {\r\n\/\/ \u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081callback()\u3068\u3057\u3066\u3044\u308b\r\n\/\/ callback(\u7b2c\u4e00\u5f15\u6570)\u306e\u4e2d\u8eab\u304c\u3053\u308c\r\nconsole.log(callback)\r\nconsole.log(lastname)\r\nconsole.log(callback(lastname))\r\nconsole.log(callback(callback))\r\nconsole.log('hello ' + callback(lastname));\r\n}\r\n\/\/ \u7121\u540d\u95a2\u6570\r\nhello2(function(name) {\r\nreturn 'suzutuki ' + name;\r\n}, 'Akina');\r\n\r\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\u306e\u8a18\u6cd5\u306b\u76f4\u3059\u3068(function\u3068{}\u3068return\u3092\u7701\u7565)\r\n\/\/ hello(() => 'suzutuki');\r\n\r\nfunction doSomething(a, b, callback) {\r\n\/\/ \u7d50\u679c\u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u6e21\u3059\r\nconst result = callback(a, b);\r\nconsole.log(result);\r\n}\r\n\r\nfunction plus(a, b) {\r\nreturn a + b;\r\n}\r\nfunction multiply(a, b) {\r\nreturn a * b;\r\n}\r\n\/\/ \u51e6\u7406\u7d50\u679c\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\r\ndoSomething(2, 3, plus);\r\ndoSomething(2, 4, multiply);<\/code><\/pre>\n<\/div>\n
<\/p>\n
\u691c\u8a3c\u3057\u3066\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u304b\u3081\u308b\u3068\u30fb\u30fb\u30fb<\/h3>\n
\"\"<\/p>\n
\u2191\u304c\u306a\u305c\u51fa\u529b\u3055\u308c\u305f\u304b\uff1f<\/p>\n
    \n
  1. \u95a2\u6570getFirstName\u306e\u623b\u308a\u5024’Tanaka’\u304ccallback\u306b\u6e21\u3055\u308c\u308b\u306e\u3067hello Tanaka\u306b\u306a\u3063\u305f<\/li>\n
  2. \u95a2\u6570getName\u306e\u623b\u308a\u5024’Tanaka Tarou’\u304ccallback\u306b\u6e21\u3055\u308c\u308b\u306e\u3067hello Tanaka Tarou\u306b\u306a\u3063\u305f<\/li>\n
  3. \u7121\u540d\u95a2\u6570function(name) { return ‘suzutuki ‘ + name; }\u306e\u90e8\u5206\u304c\u7b2c\u4e00\u5f15\u6570\u306e\u4e2d\u306b\u5165\u3063\u3066\u3044\u308b\u305f\u3081\u3053\u306e\u3088\u3046\u306b\u51fa\u529b\u3055\u308c\u305f<\/strong><\/li>\n
  4. \u7121\u540d\u95a2\u6570’Akina’\u306e\u90e8\u5206\u304c\u7b2c\u4e8c\u5f15\u6570\u306a\u306e\u3067Akina\u304c\u51fa\u529b\u3055\u308c\u305f<\/li>\n
  5. \u7121\u540d\u95a2\u6570function(name) { return ‘suzutuki ‘ + name; }\u306e\u90e8\u5206\u306ename\u306e\u90e8\u5206\u306f\u7b2c\u4e8c\u5f15\u6570\u306eAkina\u304c\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u306e\u3067Suzutuki Akina\u3068\u51fa\u529b\u3055\u308c\u305f\u3002<\/strong><\/li>\n
  6. \u7121\u540d\u95a2\u6570function(name) { return ‘suzutuki ‘ + name; }\u306e\u90e8\u5206\u306ename\u306e\u90e8\u5206\u306f\u7b2c\u4e00\u5f15\u6570\u306e\u95a2\u6570\u306e\u7121\u540d\u95a2\u6570function(name) { return ‘suzutuki ‘ + name; }\u304c\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u306e\u3067Suzutuki \uff0b\u7121\u540d\u95a2\u6570function(name) { return ‘suzutuki ‘ + name; }\u3068\u51fa\u529b\u3055\u308c\u305f\u3002<\/strong><\/li>\n
  7. 5\u306b\u5358\u7d14\u306b’hello’\u304c\u8ffd\u52a0\u3055\u308c\u305f\u3060\u3051\u306a\u306e\u3067\u51fa\u529b\u3055\u308c\u305f\u3002<\/li>\n
  8. console.log(callback);\u306ecallback\u306e\u4e2d\u8eab\u306fcallback\u95a2\u6570\u306a\u306e\u3067function plus(a, b) { return a + b; } \u304c\u51fa\u529b\u3055\u308c\u305f\u3002<\/span><\/li>\n
  9. \u5909\u6570result\u306b\u306f\u7b2c\u4e09\u5f15\u6570\u306ecallback\u95a2\u6570 function plus(a, b) { return a + b; <\/span>}\u304c\u5165\u3063\u3066\u3044\u3066\u3001\u5f0f\u5c55\u958b\u304c\u884c\u308f\u308c\u305f\u7d50\u679c5\u304c\u51fa\u529b\u3055\u308c\u305f\u3002<\/span><\/li>\n
  10. console.log(callback);\u306ecallback\u306e\u4e2d\u8eab\u306fcallback\u95a2\u6570\u306a\u306e\u3067\n
    \n
    function multiply(a, b) { return a + b; } \u304c\u51fa\u529b\u3055\u308c\u305f\u3002<\/div>\n<\/div>\n<\/li>\n
  11. \u5909\u6570result\u306b\u306f\u7b2c\u4e09\u5f15\u6570\u306ecallback\u95a2\u6570 function multiply(a, b) { return a * b; <\/span>}\u304c\u5165\u3063\u3066\u3044\u3066\u3001\u5f0f\u5c55\u958b\u304c\u884c\u308f\u308c\u305f\u7d50\u679c8\u304c\u51fa\u529b\u3055\u308c\u305f\u3002<\/span><\/li>\n<\/ol>\n
    \u203b\u30dd\u30a4\u30f3\u30c8<\/h3>\n
    \n
    console.log()\u3067\u4e2d\u8eab\u3092\u78ba\u8a8d\u3059\u308b\u3068\u7406\u89e3\u3057\u3084\u3059\u3044\u306e\u3067\u3001\u7a4d\u6975\u7684\u306b\u4f7f\u304a\u3046\uff01<\/div>\n<\/div>\n
    <\/div>\n
    \n
    2:\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3068\u30eb\u30fc\u30d7\u51e6\u7406<\/h3>\n
    HTML\u306e\u8a18\u8ff0<\/h3>\n
    \n
    <!DOCTYPE html>\r\n<html lang=\"en\">\r\n<head>\r\n  <meta charset=\"UTF-8\">\r\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n  <meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\">\r\n<title>Document<\/title>\r\n<\/head>\r\n<body>\r\n  <h1>JavaScript\u306e\u57fa\u790e<\/h1>\r\n   <script src=\"main.js\"><\/script>\r\n<\/body>\r\n<\/html><\/code><\/pre>\n<\/div>\n
    main.js\u306e\u8a18\u8ff0<\/h3>\n
    \n
    \/\/ \u666e\u901a\u306e\u30eb\u30fc\u30d7\u6587\r\n\/\/ const arry = [1,2,3,4,5,];\r\n\/\/ for(let i = 0; i< arry.length; i++) {\r\n\/\/ console.log(arry[i]);\r\n\/\/ }\r\n\r\nconst arry = [1, 2, 3, 4, 5];\r\n  function forEach(ary, callback) {\r\n  for (let i = 0; i < ary.length; i++) {\r\n  callback(ary[i]);\r\n}\r\n}\r\n\/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u7528\u610f\u3059\u308b\r\nfunction log(val) {\r\n  console.log(val);\r\n}\r\n\r\nfunction double(val) {\r\n  val = val * 2;\r\n  log(val);\r\n }\r\n\/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u3067\u540c\u3058\u95a2\u6570\u3067\u3082\u51fa\u529b\u7d50\u679c\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\r\n\r\nforEach(arry, log);\r\nforEach(arry, double);\r\n<\/code><\/pre>\n<\/div>\n
    \u691c\u8a3c\u3057\u3066\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u304b\u3081\u308b\u3068\u30fb\u30fb\u30fb<\/h3>\n
    \"\"<\/p>\n
    \u3053\u306e\u3088\u3046\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u3067\u540c\u3058\u95a2\u6570\u3067\u3082\u51fa\u529b\u7d50\u679c\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088<\/span><\/p>\n<\/div>\n
    <\/div>\n
    \u305d\u306e3\u3078\u7d9a\u304d\u307e\u3059<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"
    2\u304b\u3089\u7d9a\u304d\u307e\u3059\u3002 \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3068\u306f? \u5f15\u6570\u306b\u6e21\u3059\u95a2\u6570\u3092callback\u95a2\u6570\u3068\u3044\u3046\u3002 HTML\u306e\u8a18\u8ff0 <!DOCTYPE html> <html lang=”en”> <head>  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[17,27],"tags":[],"class_list":["post-4200","post","type-post","status-publish","format-standard","hentry","category-javascript","category-programming-note"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/4200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/comments?post=4200"}],"version-history":[{"count":16,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/4200\/revisions"}],"predecessor-version":[{"id":7277,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/4200\/revisions\/7277"}],"wp:attachment":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media?parent=4200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/categories?post=4200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/tags?post=4200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}