{"id":5256,"date":"2025-06-01T13:27:04","date_gmt":"2025-06-04T06:14:03","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5256"},"modified":"2025-06-04T13:27:04","modified_gmt":"2025-06-04T06:14:03","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e8%a8%88%e7%ae%97%e6%95%b8%e7%b5%84%e7%9a%84%e6%96%b9%e5%b7%ae","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e8%a8%88%e7%ae%97%e6%95%b8%e7%b5%84%e7%9a%84%e6%96%b9%e5%b7%ae\/","title":{"rendered":"\u6df1\u5165\u5b78\u7fd2 TypeScript\uff1a\u8f15\u9b06\u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee"},"content":{"rendered":"

<\/p>\n

\u6df1\u5165\u5b78\u7fd2 TypeScript\uff1a\u8f15\u9b06\u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee<\/h1>\n

\u5728\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u4efb\u52d9\u3002\u65b9\u5dee\u4f5c\u70ba\u4e00\u7a2e\u7d71\u8a08\u6307\u6a19\uff0c\u7528\u4f86\u8861\u91cf\u6578\u64da\u7684\u5206\u6563\u7a0b\u5ea6\uff0c\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u6a5f\u5668\u5b78\u7fd2\u7b49\u9818\u57df\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 TypeScript \u7de8\u5beb\u7c21\u55ae\u7684\u7a0b\u5f0f\u4f86\u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee\uff0c\u8b93\u4f60\u8f15\u9b06\u638c\u63e1\u9019\u9805\u6280\u80fd\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u65b9\u5dee\uff1f<\/h2>\n

\u65b9\u5dee\u662f\u7528\u4f86\u8861\u91cf\u4e00\u7d44\u6578\u64da\u5206\u6563\u7a0b\u5ea6\u7684\u6307\u6a19\u3002\u5b83\u53cd\u6620\u4e86\u6578\u64da\u9ede\u76f8\u5c0d\u65bc\u5e73\u5747\u503c\u7684\u8b8a\u5316\u60c5\u6cc1\uff0c\u8a08\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n

\nvariance = (sum(x_i - mean)^2) \/ n\n<\/pre>\n
\u5728\u9019\u88e1\uff0cx_i<\/code> \u4ee3\u8868\u6578\u7d44\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\uff0cmean<\/code> \u662f\u6578\u7d44\u7684\u5e73\u5747\u503c\uff0c\u800c n<\/code> \u5247\u662f\u6578\u7d44\u4e2d\u5143\u7d20\u7684\u7e3d\u6578\u3002<\/p>\n
\u5982\u4f55\u4f7f\u7528 TypeScript \u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee<\/h2>\n
\u4ee5\u4e0b\u662f\u4f7f\u7528 TypeScript \u8a08\u7b97\u6578\u7d44\u65b9\u5dee\u7684\u5b8c\u6574\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff1a<\/p>\n
\nfunction calculateVariance(arr: number[]): number {\n  const n = arr.length;\n  if (n === 0) return 0; \/\/ \u9632\u6b62\u7a7a\u6578\u7d44\u7684\u60c5\u6cc1\n\n  const mean = arr.reduce((acc, val) => acc + val, 0) \/ n;\n\n  const variance = arr.reduce((acc, val) => acc + Math.pow(val - mean, 2), 0) \/ n;\n\n  return variance;\n}\n<\/pre>\n
\u4ee5\u4e0a\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5148\u8a08\u7b97\u6578\u7d44\u7684\u5e73\u5747\u503c\uff0c\u7136\u5f8c\u4f7f\u7528 reduce<\/code> \u65b9\u6cd5\u4f86\u8a08\u7b97\u6bcf\u500b\u6578\u64da\u9ede\u8207\u5e73\u5747\u503c\u4e4b\u9593\u7684\u5dee\u5e73\u65b9\u548c\uff0c\u6700\u5f8c\u9664\u4ee5\u6578\u7d44\u7684\u9577\u5ea6\u4ee5\u5f97\u5230\u65b9\u5dee\u3002<\/p>\n
\u73fe\u5728\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u9019\u500b\u51fd\u6578\u4f86\u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee\uff1a<\/p>\n
\nconst numbers = [1, 2, 3, 4, 5];\nconst result = calculateVariance(numbers);\nconsole.log(result); \/\/ 2.5\n<\/pre>\n
\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u6578\u7d44 numbers<\/code>\uff0c\u4e26\u8abf\u7528 calculateVariance()<\/code> \u51fd\u6578\u4f86\u8a08\u7b97\u65b9\u5dee\uff0c\u6700\u7d42\u5c07\u7d50\u679c\u8f38\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u5728 TypeScript \u4e2d\u8a08\u7b97\u6578\u7d44\u7684\u65b9\u5dee\u3002\u5f9e\u5b9a\u7fa9\u65b9\u5dee\u7684\u610f\u7fa9\uff0c\u5230\u63d0\u4f9b\u7c21\u55ae\u6613\u7528\u7684\u8a08\u7b97\u51fd\u6578\uff0c\u9019\u4e9b\u5167\u5bb9\u5c07\u5e6b\u52a9\u4f60\u5728\u6578\u64da\u5206\u6790\u904e\u7a0b\u4e2d\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u5206\u6563\u7a0b\u5ea6\u3002\u638c\u63e1\u9019\u9805\u6280\u80fd\u5f8c\uff0c\u4f60\u5c07\u80fd\u5920\u5728\u672a\u4f86\u7684\u6578\u64da\u5206\u6790\u548c\u6a5f\u5668\u5b78\u7fd2\u4efb\u52d9\u4e2d\u66f4\u52a0\u6e38\u5203\u6709\u9918\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
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