如何在ReactJS中应用我的Vanilla JS数组操作方法

import React from 'react';

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      myArray: [1, 2, 3, 4, 5]
    };
  }

  render() {
    return (
      <div>
        {/* JSX代码 */}
      </div>
    );
  }
}

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      myArray: [1, 2, 3, 4, 5]
    };
  }

  render() {
    // 使用数组操作方法
    const newArray = this.state.myArray.map(item => item * 2);
    const filteredArray = this.state.myArray.filter(item => item > 2);
    const sum = this.state.myArray.reduce((total, item) => total + item, 0);

    return (
      <div>
        {/* JSX代码 */}
      </div>
    );
  }
}

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      myArray: [1, 2, 3, 4, 5]
    };
  }

  render() {
    const newArray = this.state.myArray.map(item => item * 2);
    const filteredArray = this.state.myArray.filter(item => item > 2);
    const sum = this.state.myArray.reduce((total, item) => total + item, 0);

    return (
      <div>
        <p>New Array: {newArray.join(', ')}</p>
        <p>Filtered Array: {filteredArray.join(', ')}</p>
        <p>Sum: {sum}</p>
      </div>
    );
  }
}