课程代码

nodejs/nodeExperiment2/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+.DS_Store
+dist
+dist-ssr
+coverage
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+*.tsbuildinfo
+
+.eslintcache
+
+# Cypress
+/cypress/videos/
+/cypress/screenshots/
+
+# Vitest
+__screenshots__/

nodejs/nodeExperiment2/array_practice.js

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+const numbers = [15, 8, 23, 4, 42, 16, 7];
+const students = [
+    { name: '张三', score: 85 },
+    { name: '李四', score: 62 },
+    { name: '王五', score: 91 }
+];
+
+console.log('1. slice() - 数组切片');
+const sliced = numbers.slice(1, 4);
+console.log('numbers.slice(1, 4):', sliced);
+
+console.log('\n2. filter() - 筛选元素');
+const evenNumbers = numbers.filter(numbers => numbers % 3 == 0);
+console.log('偶数:', evenNumbers);
+
+console.log('\n3. find() - 查找元素');
+const findScore = students.find(student => student.score > 90);
+console.log('分数>90的学生:', findScore);
+
+console.log('\n4. findIndex() - 查找索引');
+const index = numbers.findIndex(numbers => numbers > 20);
+console.log('第一个>20的数的索引:', index);
+
+console.log('\n5. every() - 所有元素满足条件');
+
+const allPassed = students.every(student => student.score >= 60);
+console.log('所有学生都及格:', allPassed);
+
+
+console.log('\n6. some() - 至少一个满足条件');
+const hasHighScore = students.some(student => student.score > 90);
+console.log('有高分学生:', hasHighScore);
+
+console.log('\n7. unshift() - 开头添加');
+const arr = [2, 3];
+arr.unshift(1);
+console.log('添加后:', arr);
+
+console.log('\n8. splice() - 添加删除');
+const colors = ['red', 'green', 'blue'];
+colors.splice(1, 1, 'yellow');
+console.log('替换后:', colors);
+
+console.log('\n9. sort() - 排序');
+const sortedAsc = [...numbers].sort((a, b) => a - b);
+const sortedDesc = [...numbers].sort((a, b) => b - a);
+console.log('升序:', sortedAsc, '降序:', sortedDesc);
+
+console.log('\n10. reduce() - 累加');
+const sum = numbers.reduce((total, num) => total + num, 0);
+console.log('数组求和:', sum);

nodejs/nodeExperiment2/index.js

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+// index.js
+const myModule = require('./myModule');
+
+console.log(`Author: ${myModule.author}`);
+console.log(myModule.greet('Alice'));
+console.log(`Sum: ${myModule.add(5, 3)}`);

nodejs/nodeExperiment2/index2.js

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+const lodash =require('lodash')
+
+
+const arry =[1,2,3,4,5]
+
+const result = lodash.reverse(arry.slice(arry))
+console.log('Reversed arry:',result);
+
+const result2 = lodash.filter(arry, (num)=> {
+    return num >= 3;
+  });
+
+  console.log(result2);
+

nodejs/nodeExperiment2/myModule.js

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+// 属性
+const author = "harry";
+
+// 方法
+function greet(name) {
+    return `Hello, ${name}`;
+}
+
+function add(a, b) {
+    return a + b;
+}
+
+// 共享属性 author 和 greet()、add()方法
+module.exports = {
+    author,
+    greet,
+    add
+};

nodejs/nodeExperiment2/package-lock.json

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+{
+  "name": "nodeExpriment2",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "lodash": "^4.17.21"
+      }
+    },
+    "node_modules/lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+      "license": "MIT"
+    }
+  }
+}

nodejs/nodeExperiment2/package.json

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+{
+  "dependencies": {
+    "lodash": "^4.17.21"
+  }
+}