node.js使用readline按行读取文件内容到Array中

落日映苍穹つ 2022-04-23 12:40 205阅读 0赞

具体代码实现如下：

使用到的实例代码如下：

//ObserverMode.js
    
    const queuedObservers = new Set();
    
    const observe = fn => queuedObservers.add(fn);
    const observable = obj => new Proxy(obj, { set});
    
    function set(target, key, value, receiver) { 
        const result = Reflect.set(target, key, value, receiver);
        queuedObservers.forEach(observer => observer());
        return result;
    }
    
    const person = observable({ 
        name: '张三',
        age: 20
    });
    
    function print() { 
        console.log(`${ person.name}, ${ person.age}`)
    }
    
    observe(print);
    person.name = '李四';

示例执行结果如下：

"D:\software\WebStorm 2017.2.4\bin\runnerw.exe" "D:\Program Files\nodejs\node.exe" D:\Workspaces\Webstorm\web\javascript\ES6\src\readFileToArr.js
    readLine close....
    [ '',
      'const queuedObservers = new Set();',
      '',
      'const observe = fn => queuedObservers.add(fn);',
      'const observable = obj => new Proxy(obj, {set});',
      '',
      'function set(target, key, value, receiver) {',
      ' const result = Reflect.set(target, key, value, receiver);',
      ' queuedObservers.forEach(observer => observer());',
      ' return result;',
      '}',
      '',
      'const person = observable({',
      ' name: \'张三\',',
      ' age: 20',
      '});',
      '',
      'function print() {',
      ' console.log(`${person.name}, ${person.age}`)',
      '}',
      '',
      'observe(print);',
      'person.name = \'李四\';',
      '' ]
    
    Process finished with exit code 0