{"id":5034,"date":"2023-01-05T11:42:10","date_gmt":"2023-01-05T03:42:10","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5034"},"modified":"2023-01-05T11:42:10","modified_gmt":"2023-01-05T03:42:10","slug":"%e5%ad%b8%e7%bf%92typescript%e4%b8%ad%e7%9a%84%e6%95%b8%e7%b5%84%e6%a7%8b%e9%80%a0%e5%87%bd%e6%95%b8","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92typescript%e4%b8%ad%e7%9a%84%e6%95%b8%e7%b5%84%e6%a7%8b%e9%80%a0%e5%87%bd%e6%95%b8\/","title":{"rendered":"\u5b78\u7fd2TypeScript\u4e2d\u7684\u6578\u7d44\u69cb\u9020\u51fd\u6578"},"content":{"rendered":"

<\/p>\n

TypeScript \u6578\u7d44\u7684\u5e38\u7528\u69cb\u9020\u51fd\u6578(Array Constructors)<\/h1>\n

TypeScript \u662f\u4e00\u7a2e JavaScript \u7684\u8d85\u96c6\uff0c\u5b83\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7279\u6027\uff0c\u4f8b\u5982\u985e\u578b\u6aa2\u67e5\u548c\u975c\u614b\u5206\u6790\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u958b\u767c\u51fa\u5065\u58ef\u7684\u7a0b\u5f0f\u78bc\u3002\u5728 TypeScript \u4e2d\uff0c\u6578\u7d44\u4e5f\u6709\u4e00\u4e9b\u5e38\u7528\u7684\u69cb\u9020\u51fd\u6578\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u64cd\u4f5c\u6578\u7d44\u3002<\/p>\n

Array.from()<\/h2>\n

Array.from() \u65b9\u6cd5\u53ef\u4ee5\u5c07\u4e00\u500b\u53ef\u8fed\u4ee3\u7684\u7269\u4ef6\u8f49\u63db\u70ba\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u4f8b\u5982\u5b57\u4e32\u3001Set\u3001Map \u7b49\u3002<\/p>\n

\n\/\/ \u5c07\u5b57\u4e32\u8f49\u63db\u70ba\u6578\u7d44\nlet str = 'Hello World';\nlet arr = Array.from(str);\nconsole.log(arr); \/\/ ['H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd']\n\n\/\/ \u5c07 Set \u8f49\u63db\u70ba\u6578\u7d44\nlet set = new Set([1, 2, 3]);\nlet arr = Array.from(set);\nconsole.log(arr); \/\/ [1, 2, 3]\n<\/pre>\n
<\/p>\n
Array.of()<\/h2>\n
Array.of() \u65b9\u6cd5\u53ef\u4ee5\u5c07\u4e00\u7cfb\u5217\u7684\u53c3\u6578\u8f49\u63db\u70ba\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u53c3\u6578\u7684\u6578\u91cf\u53ef\u4ee5\u662f\u4efb\u610f\u591a\u500b\u3002<\/p>\n
\nlet arr = Array.of(1, 2, 3);\nconsole.log(arr); \/\/ [1, 2, 3]\n<\/pre>\n
Array.prototype.fill()<\/h2>\n
Array.prototype.fill() \u65b9\u6cd5\u53ef\u4ee5\u5c07\u6578\u7d44\u4e2d\u7684\u6307\u5b9a\u7bc4\u570d\u5167\u7684\u5143\u7d20\u586b\u5145\u70ba\u6307\u5b9a\u7684\u503c\u3002<\/p>\n
\nlet arr = [1, 2, 3, 4, 5];\narr.fill(0, 2, 4);\nconsole.log(arr); \/\/ [1, 2, 0, 0, 5]\n<\/pre>\n
Array.prototype.find()<\/h2>\n
Array.prototype.find() \u65b9\u6cd5\u53ef\u4ee5\u5728\u6578\u7d44\u4e2d\u67e5\u627e\u7b26\u5408\u689d\u4ef6\u7684\u5143\u7d20\uff0c\u4e26\u8fd4\u56de\u8a72\u5143\u7d20\uff0c\u5982\u679c\u6c92\u6709\u627e\u5230\u5247\u8fd4\u56de undefined\u3002<\/p>\n
\nlet arr = [1, 2, 3, 4, 5];\nlet result = arr.find(x => x > 3);\nconsole.log(result); \/\/ 4\n<\/pre>\n
Array.prototype.filter()<\/h2>\n
Array.prototype.filter() \u65b9\u6cd5\u53ef\u4ee5\u5728\u6578\u7d44\u4e2d\u67e5\u627e\u7b26\u5408\u689d\u4ef6\u7684\u5143\u7d20\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u6578\u7d44\uff0c\u5982\u679c\u6c92\u6709\u627e\u5230\u5247\u8fd4\u56de\u7a7a\u6578\u7d44\u3002<\/p>\n
\nlet arr = [1, 2, 3, 4, 5];\nlet result = arr.filter(x => x > 3);\nconsole.log(result); \/\/ [4, 5]\n<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f TypeScript \u4e2d\u6578\u7d44\u7684\u5e38\u7528\u69cb\u9020\u51fd\u6578\uff0c\u5b83\u5011\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u64cd\u4f5c\u6578\u7d44\uff0c\u63d0\u9ad8\u958b\u767c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39TypeScript\u4e2d\u7684\u6578\u7d44\u69cb\u9020\u51fd\u6578\uff0c\u5305\u62ecArray.from()\u3001Array.of()\u3001Array.isArray()\u3001Array.prototype.concat()\u3001Array.prototype.slice()\u7b49\uff0c\u8b93\u8b80\u8005\u53ef\u4ee5\u66f4\u52a0\u4e86\u89e3TypeScript\u4e2d\u7684\u6578\u7d44\u69cb\u9020\u51fd\u6578\u7684\u529f\u80fd\u8207\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[187],"tags":[186],"class_list":["post-5034","post","type-post","status-publish","format-standard","hentry","category-typescript","tag-typescript"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1jc","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=5034"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5034\/revisions"}],"predecessor-version":[{"id":5035,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5034\/revisions\/5035"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}